services in own folder

* spitting services into multiple files in it's own folder
* making image links absolute
* some linting

17 files changed, 1763 insertions, 1714 deletions

diff --git a/docs/index.rst b/docs/index.rst
index defee653..f340f8b8 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -24,7 +24,7 @@ as a router and firewall platform for cloud deployments.
     nat.rst
     vpn.rst
     qos.rst
-    services
+    services/index.rst
     system.rst
     clustering.rst
     image-mgmt.rst
diff --git a/docs/services.rst b/docs/services.rst
deleted file mode 100644
index 3c092d91..00000000
--- a/docs/services.rst
+++ /dev/null
@@ -1,1713 +0,0 @@
-.. _services:
-
-Services
-========
-
-This chapter descriptes the available system/network services provided by VyOS.
-
-Conntrack
----------
-
-One of the important features built on top of the Netfilter framework is
-connection tracking. Connection tracking allows the kernel to keep track of all
-logical network connections or sessions, and thereby relate all of the packets
-which may make up that connection. NAT relies on this information to translate
-all related packets in the same way, and iptables can use this information to
-act as a stateful firewall.
-
-The connection state however is completely independent of any upper-level
-state, such as TCP's or SCTP's state. Part of the reason for this is that when
-merely forwarding packets, i.e. no local delivery, the TCP engine may not
-necessarily be invoked at all. Even connectionless-mode transmissions such as
-UDP, IPsec (AH/ESP), GRE and other tunneling protocols have, at least, a pseudo
-connection state. The heuristic for such protocols is often based upon a preset
-timeout value for inactivity, after whose expiration a Netfilter connection is
-dropped.
-
-Each Netfilter connection is uniquely identified by a (layer-3 protocol, source
-address, destination address, layer-4 protocol, layer-4 key) tuple. The layer-4
-key depends on the transport protocol; for TCP/UDP it is the port numbers, for
-tunnels it can be their tunnel ID, but otherwise is just zero, as if it were
-not part of the tuple. To be able to inspect the TCP port in all cases, packets
-will be mandatorily defragmented.
-
-Configuration
-^^^^^^^^^^^^^
-
-.. code-block:: sh
-
-  # Protocols only for which local conntrack entries will be synced (tcp, udp, icmp, sctp)
-  set service conntrack-sync accept-protocol
-
-  # Queue size for listening to local conntrack events (in MB)
-  set service conntrack-sync event-listen-queue-size <int>
-
-  # Protocol for which expect entries need to be synchronized. (all, ftp, h323, nfs, sip, sqlnet)
-  set service conntrack-sync expect-sync
-
-  # Failover mechanism to use for conntrack-sync [REQUIRED]
-  set service conntrack-sync failover-mechanism
-
-  set service conntrack-sync cluster group <string>
-  set service conntrack-sync vrrp sync-group <1-255>
-
-  # IP addresses for which local conntrack entries will not be synced
-  set service conntrack-sync ignore-address ipv4 <x.x.x.x>
-
-  # Interface to use for syncing conntrack entries [REQUIRED]
-  set service conntrack-sync interface <ifname>
-
-  # Multicast group to use for syncing conntrack entries
-  set service conntrack-sync mcast-group <x.x.x.x>
-
-  # Queue size for syncing conntrack entries (in MB)
-  set service conntrack-sync sync-queue-size <size>
-
-Example
-^^^^^^^
-The next exemple is a simple configuration of conntrack-sync.
-
-
-.. figure:: _static/images/service_conntrack_sync-schema.png
-   :scale: 60 %
-   :alt: Conntrack Sync Example
-
-   Conntrack Sync Example
-
-First of all, make sure conntrack is enabled by running
-
-.. code-block:: sh
-
-  show conntrack table ipv4
-
-If the table is empty and you have a warning message, it means conntrack is not
-enabled. To enable conntrack, just create a NAT or a firewall rule.
-
-.. code-block:: sh
-
-  set firewall state-policy established action accept
-
-You now should have a conntrack table
-
-.. code-block:: sh
-
-  $ show conntrack table ipv4
-  TCP state codes: SS - SYN SENT, SR - SYN RECEIVED, ES - ESTABLISHED,
-                   FW - FIN WAIT, CW - CLOSE WAIT, LA - LAST ACK,
-                   TW - TIME WAIT, CL - CLOSE, LI - LISTEN
-
-  CONN ID    Source                 Destination            Protocol         TIMEOUT
-  1015736576 10.35.100.87:58172     172.31.20.12:22        tcp [6] ES       430279
-  1006235648 10.35.101.221:57483    172.31.120.21:22       tcp [6] ES       413310
-  1006237088 10.100.68.100          172.31.120.21          icmp [1]         29
-  1015734848 10.35.100.87:56282     172.31.20.12:22        tcp [6] ES       300
-  1015734272 172.31.20.12:60286     239.10.10.14:694       udp [17]         29
-  1006239392 10.35.101.221          172.31.120.21          icmp [1]         29
-
-Now configure conntrack-sync service on ``router1`` **and** ``router2``
-
-.. code-block:: sh
-
-  set service conntrack-sync accept-protocol 'tcp,udp,icmp'
-  set service conntrack-sync event-listen-queue-size '8'
-  set service conntrack-sync failover-mechanism cluster group 'GROUP' # Or VRRP
-  set service conntrack-sync interface 'eth0'
-  set service conntrack-sync mcast-group '225.0.0.50'
-  set service conntrack-sync sync-queue-size '8'
-
-On the active router, you should have informations in the internal-cache of
-conntrack-sync. The same current active connections number should be shown in
-the external-cache of the standby router
-
-On active router run:
-
-
-.. code-block:: sh
-
-  $ show conntrack-sync statistics
-
-  Main Table Statistics:
-
-  cache internal:
-  current active connections:               10
-  connections created:                    8517    failed:            0
-  connections updated:                     127    failed:            0
-  connections destroyed:                  8507    failed:            0
-
-  cache external:
-  current active connections:                0
-  connections created:                       0    failed:            0
-  connections updated:                       0    failed:            0
-  connections destroyed:                     0    failed:            0
-
-  traffic processed:
-                     0 Bytes                         0 Pckts
-
-  multicast traffic (active device=eth0):
-                868780 Bytes sent               224136 Bytes recv
-                 20595 Pckts sent                14034 Pckts recv
-                     0 Error send                    0 Error recv
-
-  message tracking:
-                     0 Malformed msgs                    0 Lost msgs
-
-
-
-  On standby router run:
-
-
-  $ show conntrack-sync statistics
-
-  Main Table Statistics:
-
-  cache internal:
-  current active connections:                0
-  connections created:                       0    failed:            0
-  connections updated:                       0    failed:            0
-  connections destroyed:                     0    failed:            0
-
-  cache external:
-  current active connections:               10
-  connections created:                     888    failed:            0
-  connections updated:                     134    failed:            0
-  connections destroyed:                   878    failed:            0
-
-  traffic processed:
-                     0 Bytes                         0 Pckts
-
-  multicast traffic (active device=eth0):
-                234184 Bytes sent               907504 Bytes recv
-                 14663 Pckts sent                21495 Pckts recv
-                     0 Error send                    0 Error recv
-
-  message tracking:
-                     0 Malformed msgs                    0 Lost msgs
-
-
-DHCP
-----
-
-Multiple DHCP Servers can be run from a single machine. Each DHCP service is
-identified by a `shared-network-name`.
-
-DHCP Server Example
-^^^^^^^^^^^^^^^^^^^
-
-In this example, we are offering address space in the 172.16.17.0/24 network,
-which is on eth1, and pppoe0 is our connection to the internet. We are using
-the network name `dhcpexample`.
-
-Prerequisites
-^^^^^^^^^^^^^
-
-Configuring the PPPoE interface is assumed to be done already, and appears
-on `pppoe0`
-
-Interface Configuration
-^^^^^^^^^^^^^^^^^^^^^^^
-
-.. code-block:: sh
-
- set interface eth1 address 172.16.17.1/24
-
-Multiple ranges can be defined and can contain holes.
-
-.. code-block:: sh
-
-  set service dhcp-server shared-network-name dhcpexample authoritative
-  set service dhcp-server shared-network-name dhcpexample subnet 172.16.17.0/24 default-router 172.16.17.1
-  set service dhcp-server shared-network-name dhcpexample subnet 172.16.17.0/24 dns-server 172.16.17.1
-  set service dhcp-server shared-network-name dhcpexample subnet 172.16.17.0/24 lease 86400
-  set service dhcp-server shared-network-name dhcpexample subnet 172.16.17.0/24 range 0 start 172.16.17.100
-  set service dhcp-server shared-network-name dhcpexample subnet 172.16.17.0/24 range 0 stop 172.16.17.199
-
-Failover
-^^^^^^^^
-
-VyOS provides support for DHCP failover:
-
-.. code-block:: sh
-
-  set service dhcp-server shared-network-name 'LAN' subnet '192.168.0.0/24' failover local-address '192.168.0.1'
-  set service dhcp-server shared-network-name 'LAN' subnet '192.168.0.0/24' failover name 'foo'
-  set service dhcp-server shared-network-name 'LAN' subnet '192.168.0.0/24' failover peer-address '192.168.0.2'
-
-.. note:: `name` must be identical on both sides!
-
-The primary and secondary statements determines whether the server is primary or secondary
-
-.. code-block:: sh
-
-  set service dhcp-server shared-network-name 'LAN' subnet '192.168.0.0/24' failover status 'primary'
-
-or
-
-.. code-block:: sh
-
-  set service dhcp-server shared-network-name 'LAN' subnet '192.168.0.0/24' failover status 'secondary'
-
-.. note:: In order for the primary and the secondary DHCP server to keep
-   their lease tables in sync, they must be able to reach each other on TCP
-   port 647. If you have firewall rules in effect, adjust them accordingly.
-
-Static mappings MAC/IP
-^^^^^^^^^^^^^^^^^^^^^^
-
-.. code-block:: sh
-
-  set service dhcp-server shared-network-name dhcpexample subnet 172.16.17.0/24 static-mapping static-mapping-01 ip-address 172.16.17.10
-  set service dhcp-server shared-network-name dhcpexample subnet 172.16.17.0/24 static-mapping static-mapping-01 mac-address ff:ff:ff:ff:ff:ff
-
-Explanation
-^^^^^^^^^^^
-
-* :code:`set service dhcp-server shared-network-name dhcpexample authoritative`
-
-  This says that this device is the only DHCP server for this network. If other
-  devices are trying to offer DHCP leases, this machine will send 'DHCPNAK' to
-  any device trying to request an IP address that is not valid for this network.
-
-* :code:`set service dhcp-server shared-network-name dhcpexample subnet
-  172.16.17.0/24 default-router 172.16.17.1`
-
-  This is a configuration parameter for the subnet, saying that as part of the
-  response, tell the client that I am the default router for this network
-
-* :code:`set service dhcp-server shared-network-name dhcpexample subnet
-  172.16.17.0/24 dns-server 172.16.17.1`
-
-  This is a configuration parameter for the subnet, saying that as part of the
-  response, tell the client that I am the DNS server for this network. If you
-  do not want to run a DNS server, you could also provide one of the public
-  DNS servers, such as google's. You can add multiple entries by repeating the
-  line.
-
-* :code:`set service dhcp-server shared-network-name dhcpexample subnet
-  172.16.17.0/24 lease 86400`
-
-  Assign the IP address to this machine for 24 hours. It is unlikely you'd need
-  to shorten this period, unless you are running a network with lots of devices
-  appearing and disappearing.
-
-
-* :code:`set service dhcp-server shared-network-name dhcpexample subnet
-  172.16.17.0/24 range 0 start 172.16.17.100`
-
-  Make a range of addresses available for clients starting from .100 [...]
-
-* :code:`set service dhcp-server shared-network-name dhcpexample subnet
-  172.16.17.0/24 range 0 stop 172.16.17.199`
-
-  [...] and ending at .199
-
-
-DHCPv6 server
--------------
-
-VyOS provides DHCPv6 server functionality which is described in this section.
-In order to use the DHCPv6 server it has to be enabled first:
-
-.. code-block:: sh
-
-  set service dhcpv6-server
-
-To restart the DHCPv6 server (operational mode):
-
-.. code-block:: sh
-
-  restart dhcpv6 server
-
-To show the current status of the DHCPv6 server use:
-
-.. code-block:: sh
-
-  show dhcpv6 server status
-
-Show statuses of all assigned leases:
-
-.. code-block:: sh
-
-  show dhcpv6 server leases
-
-DHCPv6 server options
-^^^^^^^^^^^^^^^^^^^^^
-
-DHCPv6 server preference value
-******************************
-
-Clients receiving advertise messages from multiple servers choose the server
-with the highest preference value. The range for this value is `0...255`. Set
-a preference value for the DHCPv6 server:
-
-.. code-block:: sh
-
-  set service dhcpv6-server preference <preference value>
-
-Delete a preference:
-
-.. code-block:: sh
-
-  set service dhcpv6-server preference
-
-Show current preference:
-
-.. code-block:: sh
-
-  show service dhcpv6-server preference
-
-Specify address lease time
-**************************
-
-The default lease time for DHCPv6 leases is 24 hours. This can be changed by
-supplying a `default-time`, `maximum-time` and `minimum-time` (all values in
-seconds):
-
-.. code-block:: sh
-
-  set service dhcpv6-server shared-network-name <name> subnet <ipv6net> lease-time {default <default-time> | maximum <maximum-time> | minimum <minimum-time>}
-
-Reset the custom lease times:
-
-.. code-block:: sh
-
-  delete service dhcpv6-server shared-network-name <name> subnet <ipv6net> lease-time {default | maximum | minimum}
-
-Show the current configuration:
-
-.. code-block:: sh
-
-  show service dhcpv6-server shared-network-name <name> subnet <ipv6net> lease-time {default | maximum | minimum}
-
-Specify NIS domain
-******************
-
-A Network Information (NIS) domain can be set to be used for DHCPv6 clients:
-
-.. code-block:: sh
-
-  set service dhcpv6-server shared-network-name <name> subnet <ipv6net> nis-domain <nis-domain-name>
-
-To Delete the NIS domain:
-
-.. code-block:: sh
-
-  delete service dhcpv6-server shared-network-name <name> subnet <ipv6net> nis-domain <nis-domain-name>
-
-Show a configured NIS domain:
-
-.. code-block:: sh
-
-  show service dhcpv6-server shared-network-name <name> subnet <ipv6net> nis-domain <nis-domain-name>
-
-Specify NIS+ domain
-*******************
-
-The procedure to specify a Network Information Service Plus (NIS+) domain is
-similar to the NIS domain one:
-
-.. code-block:: sh
-
-  set service dhcpv6-server shared-network-name <name> subnet <ipv6net> nisplus-domain <nisplus-domain-name>
-
-To Delete the NIS+ domain:
-
-.. code-block:: sh
-
-  delete service dhcpv6-server shared-network-name <name> subnet <ipv6net> nisplus-domain <nisplus-domain-name>
-
-Show a configured NIS domain:
-
- # show service dhcpv6-server shared-network-name <name> subnet <ipv6net> nisplus-domain <nisplus-domain-name>
-
-Specify NIS server address
-**************************
-
-To specify a NIS server address for DHCPv6 clients:
-
-.. code-block:: sh
-
-  set service dhcpv6-server shared-network-name <name> subnet <ipv6net> nis-server <IPv6 address>
-
-Delete a specified NIS server address:
-
-.. code-block:: sh
-
-  delete service dhcpv6-server shared-network-name <name> subnet <ipv6net> nis-server <IPv6 address>
-
-Show specified NIS server addresses:
-
-.. code-block:: sh
-
-  show service dhcpv6-server shared-network-name <name> subnet <ipv6net> nis-server
-
-Specify NIS+ server address
-***************************
-
-To specify a NIS+ server address for DHCPv6 clients:
-
-.. code-block:: sh
-
-  set service dhcpv6-server shared-network-name <name> subnet <ipv6net> nisplus-server <IPv6 address>
-
-Delete a specified NIS+ server address:
-
-.. code-block:: sh
-
-  delete service dhcpv6-server shared-network-name <name> subnet <ipv6net> nisplus-server <IPv6 address>
-
-Show specified NIS+ server addresses:
-
-.. code-block:: sh
-
-  show service dhcpv6-server shared-network-name <name> subnet <ipv6net> nisplus-server
-
-Specify a SIP server address for DHCPv6 clients
-***********************************************
-
-By IPv6 address
-###############
-
-
-A Session Initiation Protocol (SIP) server address can be specified for DHCPv6 clients:
-
-.. code-block:: sh
-
-  set service dhcpv6-server shared-network-name <name> subnet <ipv6net> sip-server-address <IPv6 address>
-
-Delete a specified SIP server address:
-
-.. code-block:: sh
-
-  delete service dhcpv6-server shared-network-name <name> subnet <ipv6net> sip-server-address <IPv6 address>
-
-Show specified SIP server addresses:
-
-.. code-block:: sh
-
-  show service dhcpv6-server shared-network-name <name> subnet <ipv6net> sip-server-address
-
-By FQDN
-#######
-
-A name for SIP server can be specified:
-
-.. code-block:: sh
-
-  set service dhcpv6-server shared-network-name <name> subnet <ipv6net> sip-server-name <sip-server-name>
-
-Delete a specified SIP server name:
-
-.. code-block:: sh
-
-  delete service dhcpv6-server shared-network-name <name> subnet <ipv6net> sip-server-name <sip-server-name>
-
-Show specified SIP server names:
-
-.. code-block:: sh
-
-  show service dhcpv6-server shared-network-name <name> subnet <ipv6net> sip-server-name
-
-Simple Network Time Protocol (SNTP) server address for DHCPv6 clients
-*********************************************************************
-
-A SNTP server address can be specified for DHCPv6 clients:
-
-.. code-block:: sh
-
-  set service dhcpv6-server shared-network-name <name> subnet <ipv6net> sntp-server-address <IPv6 address>
-
-Delete a specified SNTP server address:
-
-.. code-block:: sh
-
-  delete service dhcpv6-server shared-network-name <name> subnet <ipv6net> sntp-server-address <IPv6 address>
-
-Show specified SNTP server addresses:
-
-.. code-block:: sh
-
-  show service dhcpv6-server shared-network-name <name> subnet <ipv6net> sntp-server-address
-
-DHCPv6 address pools
-^^^^^^^^^^^^^^^^^^^^
-
-DHCPv6 address pools must be configured for the system to act as a DHCPv6
-server. The following example describes a common scenario.
-
-Example 1: DHCPv6 address pool
-******************************
-
-A shared network named `NET1` serves subnet `2001:db8:100::/64` which is
-connected to `eth1`, a DNS server at `2001:db8:111::111` is used for name
-services. The range of the address pool shall be `::100` through `::199`. The
-lease time will be left at the default value which is 24 hours.
-
-.. code-block:: sh
-
-  set service dhcpv6-server shared-network-name NET1 subnet 2001:db8:100::/64 address-range start 2001:db8:100::100 stop 2001:db8:100::199
-  set service dhcpv6-server shared-network-name NET1 subnet 2001:db8:100::/64 name-server 2001:db8:111::111
-
-Commit the changes and show the configuration:
-
-.. code-block:: sh
-
-  commit
-  show service dhcpv6-server
-      shared-network-name NET1 {
-          subnet 2001:db8:100::/64 {
-             address-range {
-                start 2001:db8:100::100 {
-                   stop 2001:db8:100::199
-                }
-             }
-             name-server 2001:db8:111::111
-          }
-      }
-
-Static mappings
-^^^^^^^^^^^^^^^
-
-In order to map specific IPv6 addresses to specific hosts static mappings can
-be created. The following example explains the process.
-
-Example 1: Static IPv6 MAC-based mapping
-****************************************
-
-IPv6 address `2001:db8:100::101` shall be statically mapped to a device with
-MAC address `00:15:c5:b7:5e:23`, this host-specific mapping shall be named
-`client1`.
-
-.. note:: The MAC address identifier is defined by the last 4 byte of the
-   MAC address.
-
-.. code-block:: sh
-
-  set service dhcpv6-server shared-network-name NET1 subnet 2001:db8:100::/64 static-mapping client1 ipv6-address 2001:db8:100::101
-  set service dhcpv6-server shared-network-name NET1 subnet 2001:db8:100::/64 static-mapping client1 identifier c5b75e23
-
-Commit the changes and show the configuration:
-
-.. code-block:: sh
-
-  show service dhcp-server shared-network-name NET1
-     shared-network-name NET1 {
-         subnet 2001:db8:100::/64 {
-            name-server 2001:db8:111::111
-            address-range {
-                start 2001:db8:100::100 {
-                   stop 2001:db8:100::199 {
-                }
-            }
-            static-mapping client1 {
-               ipv6-address 2001:db8:100::101
-               identifier c5b75e23
-            }
-         }
-      }
-
-
-DHCP Relay
-----------
-
-If you want your router to forward DHCP requests to an external DHCP server
-you can configure the system to act as a DHCP relay agent. The DHCP relay
-agent works with IPv4 and IPv6 addresses.
-
-All interfaces used for the DHCP relay must be configured. See
-https://wiki.vyos.net/wiki/Network_address_setup.
-
-DHCP relay example
-^^^^^^^^^^^^^^^^^^
-
-.. figure:: _static/images/service_dhcp-relay01.png
-   :scale: 80 %
-   :alt: DHCP relay example
-
-   DHCP relay example
-
-In this example the interfaces used for the DHCP relay are eth1 and eth2. The
-router receives DHCP client requests on eth1 and relays them through eth2 to
-the DHCP server at 10.0.1.4.
-
-Configuration
-^^^^^^^^^^^^^
-
-Enable DHCP relay for eth1 and eth2:
-
-.. code-block:: sh
-
-  set service dhcp-relay interface eth1
-  set service dhcp-relay interface eth2
-
-Set the IP address of the DHCP server:
-
-.. code-block:: sh
-
-  set service dhcp-relay server 10.0.1.4
-
-The router should discard DHCP packages already containing relay agent
-information to ensure that only requests from DHCP clients are forwarded:
-
-.. code-block:: sh
-
-  set service dhcp-relay relay-options relay-agents-packets discard
-
-Commit the changes and show the results:
-
-.. code-block:: sh
-
-  commit
-  show service dhcp-relay
-      interface eth1
-      interface eth2
-      server 10.0.1.4
-      relay-options {
-         relay-agents-packets discard
-      }
-
-The DHCP relay agent can be restarted with:
-
-.. code-block:: sh
-
-  restart dhcp relay-agent
-
-DHCPv6 relay example
-^^^^^^^^^^^^^^^^^^^^
-
-.. figure:: _static/images/service_dhcpv6-relay01.png
-   :scale: 80 %
-   :alt: DHCPv6 relay example
-
-   DHCPv6 relay example
-
-In this example DHCPv6 requests are received by the router on eth1 (`listening
-interface`) and forwarded through eth2 (`upstream interface`) to the external
-DHCPv6 server at 2001:db8:100::4.
-
-Configuration
-*************
-
-Set eth1 to be the listening interface for the DHCPv6 relay:
-
-.. code-block:: sh
-
-  set service dhcpv6-relay listen-interface eth1
-
-Set eth2 to be the upstream interface and specify the IPv6 address of the DHCPv6 server:
-
-.. code-block:: sh
-
-  set service dhcpv6-relay upstream-interface eth2 address 2001:db8:100::4
-
-Commit the changes and show results:
-
-.. code-block:: sh
-
-  commit
-  show service dhcpv6-relay
-      listen-interface eth1 {
-      }
-      upstream-interface eth2 {
-         address 2001:db8:100::4
-      }
-
-Show the current status of the DHCPv6 relay agent:
-
-.. code-block:: sh
-
-  show dhcpv6 relay-agent status
-
-The DHCPv6 relay agent can be restarted with:
-
-.. code-block:: sh
-
-  restart dhcpv6 relay-agent
-
-Additional parameters
-^^^^^^^^^^^^^^^^^^^^^
-
-DHCP relay agent options
-************************
-
-Set the maximum hop count before packets are discarded. Range 0...255,
-default 10.
-
-* :code:`set service dhcp-relay relay-options hop-count 'count'`
-
-Set maximum size of DHCP packets including relay agent information. If a
-DHCP packet size surpasses this value it will be forwarded without appending
-relay agent information. Range 64...1400, default 576.
-
-* :code:`set service dhcp-relay relay-options max-size 'size'`
-
-Four policies for reforwarding DHCP packets exist:
-
-* **append:** The relay agent is allowed to append its own relay information
-  to a received DHCP packet, disregarding relay information already present in
-  the packet.
-
-* **discard:** Received packets which already contain relay information will
-  be discarded.
-
-* **forward:** All packets are forwarded, relay information already present
-  will be ignored.
-
-* **replace:** Relay information already present in a packet is stripped and
-  replaced with the router's own relay information set.
-
-* :code:`set service dhcp-relay relay-options relay-agents-packet 'policy'`
-
-DHCPv6 relay agent options
-**************************
-
-Set maximum hop count before packets are discarded. Default: 10.
-
-* :code:`set service dhcpv6-relay max-hop-count 'count'`
-
-If this is set the relay agent will insert the interface ID. This option is
-set automatically if more than one listening interfaces are in use.
-
-* :code:`set service dhcpv6-relay use-interface-id-option`
-
-DNS Forwarding
---------------
-
-Use DNS forwarding if you want your router to function as a DNS server for the
-local network. There are several options, the easiest being 'forward all
-traffic to the system DNS server(s)' (defined with set system name-server):
-
-.. code-block:: sh
-
-  set service dns forwarding system
-
-Manually setting DNS servers for forwarding:
-
-.. code-block:: sh
-
-  set service dns forwarding name-server 8.8.8.8
-  set service dns forwarding name-server 8.8.4.4
-
-Manually setting DNS servers with IPv6 connectivity:
-
-.. code-block:: sh
-
-  set service dns forwarding name-server 2001:4860:4860::8888
-  set service dns forwarding name-server 2001:4860:4860::8844
-
-Setting a forwarding DNS server for a specific domain:
-
-.. code-block:: sh
-
-  set service dns forwarding domain example.com server 192.0.2.1
-
-Example 1
-^^^^^^^^^
-
-Router with two interfaces eth0 (WAN link) and eth1 (LAN). A DNS server for the
-local domain (example.com) is at 192.0.2.1, other DNS requests are forwarded
-to Google's DNS servers.
-
-.. code-block:: sh
-
-  set service dns forwarding domain example.com server 192.0.2.1
-  set service dns forwarding name-server 8.8.8.8
-  set service dns forwarding name-server 8.8.4.4
-  set service dns forwarding listen-on 'eth1'
-
-Example 2
-^^^^^^^^^
-
-Same as example 1 but with additional IPv6 addresses for Google's public DNS
-servers:
-
-.. code-block:: sh
-
-  set service dns forwarding domain example.com server 192.0.2.1
-  set service dns forwarding name-server 8.8.8.8
-  set service dns forwarding name-server 8.8.4.4
-  set service dns forwarding name-server 2001:4860:4860::8888
-  set service dns forwarding name-server 2001:4860:4860::8844
-  set service dns forwarding listen-on 'eth1'
-
-Dynamic DNS
------------
-
-VyOS is able to update a remote DNS record when an interface gets a new IP
-address. In order to do so, VyOS includes ddclient_, a perl script written for
-this exact purpose.
-
-ddclient_ uses two methods to update a DNS record. The first one will send
-updates directly to the DNS daemon, in compliance with RFC2136_. The second
-one involves a third party service, like DynDNS.com or any other similar
-website. This method uses HTTP requests to transmit the new IP address. You
-can configure both in VyOS.
-
-VyOS CLI and RFC2136
-^^^^^^^^^^^^^^^^^^^^
-
-First, create an RFC2136_ config node :
-
-.. code-block:: sh
-
-  edit service dns dynamic interface eth0 rfc2136 <confignodename>
-
-Present your RNDC key to ddclient :
-
-.. code-block:: sh
-
-  set key /config/dyndns/mydnsserver.rndc.key
-
-Set the DNS server IP/FQDN :
-
-.. code-block:: sh
-
-  set server dns.mydomain.com
-
-Set the NS zone to be updated :
-
-.. code-block:: sh
-
-  set zone mydomain.com
-
-Set the records to be updated :
-
-.. code-block:: sh
-
-  set record dyn
-  set record dyn2
-
-You can optionally set a TTL (note : default value is 600 seconds) :
-
-.. code-block:: sh
-
-  set ttl 600
-
-This will generate the following ddclient config blocks:
-
-.. code-block:: sh
-
-  server=dns.mydomain.com
-  protocol=nsupdate
-  password=/config/dyndns/mydnsserver.rndc.key
-  ttl=600
-  zone=mydomain.com
-  dyn
-  server=dns.mydomain.com
-  protocol=nsupdate
-  password=/config/dyndns/mydnsserver.rndc.key
-  ttl=600
-  zone=mydomain.com
-  dyn2
-
-You can also keep a different dns zone updated. Just create a new config node:
-
-.. code-block:: sh
-
-  edit service dns dynamic interface eth0 rfc2136 <confignode2>
-
-VyOS CLI and HTTP dynamic DNS services
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-VyOS is also able to use any service relying on protocols supported by ddclient.
-
-To use such a service, you must define a login, a password, one or multiple
-hostnames, a protocol and a server.
-
-.. code-block:: sh
-
-  edit service dns dynamic interface eth0 service HeNet
-  set login my-login # set password my-password
-  set host-name my-tunnel-id
-  set protocol dyndns2
-  set server ipv4.tunnelbroker.net
-
-VyOS is also shipped with a list of known services. You don't need to set the
-protocol and server value as VyOS has defaults provided for those. These are
-the services VyOS knows about:
-
-* afraid
-* changeip
-* dnspark
-* dslreports
-* dyndns
-* easydns
-* namecheap
-* noip
-* zoneedit
-
-To use DynDNS for example:
-
-.. code-block:: sh
-
-  edit service dns dynamic interface eth0 service dyndns
-  set login my-login
-  set password my-password
-  set host-name my-dyndns-hostname
-
-It's possible to use multiple services :
-
-.. code-block:: sh
-
-  edit service dns dynamic interface eth0 service dyndns
-  set login my-login
-  set password my-password
-  set host-name my-dyndns-hostname
-  edit service dns dynamic interface eth0 service HeNet
-  set login my-login
-  set password my-password
-  set host-name my-tunnel-id
-  set protocol dyndns2
-  set server ipv4.tunnelbroker.net
-
-ddclient behind NAT
-^^^^^^^^^^^^^^^^^^^
-
-By default, ddclient will update a dynamic dns record using the IP address
-directly attached to the interface. If your VyOS instance is behind NAT, your
-record will be updated to point to your internal IP.
-
-ddclient_ has another way to determine the WAN IP address. This is controlled
-by these two options:
-
-.. code-block:: sh
-
-  set service dns dynamic interface eth0 use-web url
-  set service dns dynamic interface eth0 use-web skip
-
-ddclient_ will load the webpage at `[url]` and will try to extract an IP
-address for the response. ddclient_ will skip any address located before the
-string set in `[skip]`.
-
-LLDP
-----
-
-The Link Layer Discovery Protocol (LLDP) is a vendor-neutral link layer protocol
-in the Internet Protocol Suite used by network devices for advertising their
-identity, capabilities, and neighbors on an IEEE 802 local area network,
-principally wired Ethernet.[1] The protocol is formally referred to by the IEEE
-as Station and Media Access Control Connectivity Discovery specified in
-IEEE 802.1AB and IEEE 802.3-2012 section 6 clause 79.
-
-LLDP performs functions similar to several proprietary protocols, such as `Cisco
-Discovery Protocol`_, `Foundry Discovery Protocol`_, Nortel Discovery Protocol
-and Link Layer Topology Discovery.
-
-Information gathered
-^^^^^^^^^^^^^^^^^^^^
-
-Information gathered with LLDP is stored in the device as a management
-information database (MIB_) and can be queried with the Simple Network
-Management Protocol (SNMP_) as specified in RFC 2922. The topology of an
-LLDP-enabled network can be discovered by crawling the hosts and querying this
-database. Information that may be retrieved include:
-
-* System name and description
-* Port name and description
-* VLAN name
-* IP management address
-* System capabilities (switching, routing, etc.)
-* MAC/PHY information
-* MDI power
-* Link aggregation
-
-Configuration
-^^^^^^^^^^^^^
-
-* Enable service with:
-
-  :code:`set service lldp`
-
-Options
-*******
-
-* Configure a Define management-address:
-
-  :code:`set service lldp management-address <x.x.x.x>`
-
-* Define listening interfaces
-
-  :code:`set service lldp interface <all|interface name>`
-
-* LLDPd also implements an SNMP subagent. To Enable SNMP queries of the LLDP
-  database:
-
-  :code:`set service lldp snmp enable`
-
-* Enable optional/other protocols
-
-  :code:`set service lldp legacy-protocols cdp`
-
-  Supported legacy protocols:
-
- * ``cdp`` - Listen for CDP for Cisco routers/switches
- * ``edp`` - Listen for EDP for Extreme routers/switches
- * ``fdp`` - Listen for FDP for Foundry routers/switches
- * ``sonmp`` - Listen for SONMP for Nortel routers/switches
-
-
-Display neighbors
-^^^^^^^^^^^^^^^^^
-
-* Display with:
-
-``show lldp neighbors``
-
-Exemple:
-
-.. code-block:: sh
-
-  vyos@vyos:~# show lldp neighbors
-  Capability Codes: R - Router, B - Bridge, W - Wlan r - Repeater, S - Station
-                   D - Docsis, T - Telephone, O - Other
-  Device ID                 Local  Proto  Cap   Platform             Port ID
-  ---------                 -----  -----  ---   --------             -------
-  swA309                    eth0   LLDP   ?     Cisco IOS Software,  GigE0/33
-
-
-* Options:
-
- * ``detail`` - Show lldp neighbors detail
- * ``interface`` - Show LLDP for specified interface
-
-Troubleshooting
-^^^^^^^^^^^^^^^
-
-Use operationnal command ``show log lldp`` to display logs.
-
-mDNS Repeater
--------------
-
-Starting with VyOS 1.2 a `Multicast DNS`_ (mDNS) repeater functionality is
-provided.
-
-Multicast DNS uses the 224.0.0.51 address, which is "administratively scoped"
-and does not leave the subnet. It re-broadcast mDNS packets from one interface
-to other interfaces. This enables support for e.g. Apple Airplay devices across
-multiple VLANs.
-
-To enable mDNS repeater you need to configure at least two interfaces. To re-
-broadcast all mDNS packets from `eth0` to `eth1` and vice versa run:
-
-.. code-block:: sh
-
-  set service mdns repeater interface eth0
-  set service mdns repeater interface eth1
-
-mDNS repeater can be temporarily disabled without deleting the service using
-
-.. code-block:: sh
-
-  set service mdns repeater disable
-
-.. note:: You can not run this in a VRRP setup, if multiple mDNS repeaters
-   are launched in a subnet you will experience the mDNS packet storm death!
-
-PPPoE server
-------------
-
-VyOS utilizes `accel-ppp`_ to provide PPPoE server functionality. It can be
-used with local authentication or a connected RADIUS server. 
-
-.. note:: Please be aware, due to an upstream bug, config changes/commits
-   will restart the ppp daemon and will reset existing PPPoE connections from
-   connected users, in order to become effective.**
-
-Configuration
-^^^^^^^^^^^^^
-
-The example below uses ACN as access-concentrator name, assigns an address
-from the pool 10.1.1.100-111, terminates at the local endpoint 10.1.1.1 and
-serves requests only on eth1.
-
-.. code-block:: sh
-
-  set service pppoe-server access-concentrator 'ACN'
-  set service pppoe-server authentication local-users username foo password 'bar'
-  set service pppoe-server authentication mode 'local'
-  set service pppoe-server client-ip-pool start '10.1.1.100'
-  set service pppoe-server client-ip-pool stop '10.1.1.111'
-  set service pppoe-server dns-servers server-1 '10.100.100.1'
-  set service pppoe-server dns-servers server-2 '10.100.200.1'
-  set service pppoe-server interface 'eth1'
-  set service pppoe-server local-ip '10.1.1.2'
-
-
-Connections can be locally checked via the command 
-
-.. code-block:: sh
-
-  show pppoe-server sessions 
-  ifname | username |    calling-sid    |     ip     | type  | comp | state  |  uptime  
-  -------+----------+-------------------+------------+-------+------+--------+----------
-  ppp0   | foo      | 08:00:27:fa:3e:50 | 10.1.1.100 | pppoe |      | active | 00:04:15
-
-
-To use a radius server, you need to switch to authentication mode radius and
-of course need to specify an IP for the server. You can have multiple RADIUS
-server configured, if you wish to achieve redundancy. 
-
-.. code-block:: sh
-
-  set service pppoe-server access-concentrator 'ACN'
-  set service pppoe-server authentication mode 'radius'
-  set service pppoe-server authentication radius-server 10.1.100.1 secret 'secret'
-  set service pppoe-server interface 'eth1'
-  set service pppoe-server local-ip '10.1.1.2'
-
-RADIUS provides the IP addresses in the example above via Framed-IP-Address. 
-
-
-UDP broadcast relay
--------------------
-
-Certain vendors use broadcasts to identify their equipemnt within one ethernet
-segment. Unfortunately if you split your network with multiple VLANs you loose
-the ability of identifying your equiment.
-
-This is where "UDP broadcast relay" comes into play! It will forward received
-broadcasts to other configured networks.
-
-Every UDP port which will be forward requires one unique ID. Currently we
-support 99 IDs!
-
-Example #1: To forward all broadcast packets received on `UDP port 1900` on
-`eth3`, `eth4` or `eth5` to all other interfaces in this configuration.
-
-.. code-block:: sh
-
-  set service broadcast-relay id 1 description 'SONOS'
-  set service broadcast-relay id 1 interface 'eth3'
-  set service broadcast-relay id 1 interface 'eth4'
-  set service broadcast-relay id 1 interface 'eth5'
-  set service broadcast-relay id 1 port '1900'
-
-Example #2: To Forward all broadcasts packets received on `UDP port 6969` on
-`eth3` or `eth4` to the other interface in this configuration.
-
-.. code-block:: sh
-
-  set service broadcast-relay id 2 description 'SONOS MGMT'
-  set service broadcast-relay id 2 interface 'eth3'
-  set service broadcast-relay id 2 interface 'eth4'
-  set service broadcast-relay id 2 port '6969'
-
-Disable Instance(s)
-^^^^^^^^^^^^^^^^^^^
-
-Each broadcast relay instance can be individually disabled without deleting the
-configured node by using the following command:
-
-.. code-block:: sh
-
-  set service broadcast-relay id <n> disable
-
-In addition you can also disable the whole service without removing the
-configuration by:
-
-.. code-block:: sh
-
-  set service broadcast-relay disable
-
-.. note:: You can run the UDP broadcast relay service on multiple routers
-   connected to a subnet. There is **NO** UDP broadcast relay packet storm!
-
-SNMP
-----
-
-Simple Network Management Protocol (SNMP_) is an Internet Standard protocol
-for collecting and organizing information about managed devices on IP networks
-and for modifying that information to change device behavior. Devices that
-typically support SNMP include cable modems, routers, switches, servers,
-workstations, printers, and more.
-
-SNMP is widely used in network management for network monitoring. SNMP exposes
-management data in the form of variables on the managed systems organized in
-a management information base (MIB_) which describe the system status and
-configuration. These variables can then be remotely queried (and, in some
-circumstances, manipulated) by managing applications.
-
-Three significant versions of SNMP have been developed and deployed. SNMPv1 is
-the original version of the protocol. More recent versions, SNMPv2c and SNMPv3,
-feature improvements in performance, flexibility and security.
-
-SNMP is a component of the Internet Protocol Suite as defined by the Internet
-Engineering Task Force (IETF). It consists of a set of standards for network
-management, including an application layer protocol, a database schema, and a
-set of data objects.
-
-Overview and basic concepts
-^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-In typical uses of SNMP, one or more administrative computers called managers
-have the task of monitoring or managing a group of hosts or devices on a
-computer network. Each managed system executes a software component called an
-agent which reports information via SNMP to the manager.
-
-An SNMP-managed network consists of three key components:
-
-* Managed devices
-
-* Agent – software which runs on managed devices
-
-* Network management station (NMS) – software which runs on the manager
-
-A managed device is a network node that implements an SNMP interface that
-allows unidirectional (read-only) or bidirectional (read and write) access to
-node-specific information. Managed devices exchange node-specific information
-with the NMSs. Sometimes called network elements, the managed devices can be
-any type of device, including, but not limited to, routers, access servers,
-switches, cable modems, bridges, hubs, IP telephones, IP video cameras,
-computer hosts, and printers.
-
-An agent is a network-management software module that resides on a managed
-device. An agent has local knowledge of management information and translates
-that information to or from an SNMP-specific form.
-
-A network management station executes applications that monitor and control
-managed devices. NMSs provide the bulk of the processing and memory resources
-required for network management. One or more NMSs may exist on any managed
-network.
-
-.. figure:: _static/images/service_snmp_communication_principles_diagram.png
-   :scale: 20 %
-   :alt: Principle of SNMP Communication
-
-   Image thankfully borrowed from
-   https://en.wikipedia.org/wiki/File:SNMP_communication_principles_diagram.PNG
-   which is under the GNU Free Documentation License
-
-.. note:: VyOS SNMP supports both IPv4 and IPv6.
-
-SNMP protocol versions
-^^^^^^^^^^^^^^^^^^^^^^
-
-VyOS itself supports SNMPv2_ (version 2) and SNMPv3_ (version 3) where the
-later is recommended because of improved security (optional authentication and
-encryption).
-
-SNMPv2
-^^^^^^
-
-SNMPv2 is the original and most commonly used version. For authorizing clients,
-SNMP uses the concept of communities. Communities may have authorization set
-to read only (this is most common) or to read and write (this option is not
-actively used in VyOS).
-
-SNMP can work synchronously or asynchronously. In synchronous communication,
-the monitoring system queries the router periodically. In asynchronous, the
-router sends notification to the "trap" (the monitoring host).
-
-SNMPv2 does not support any authentication mechanisms, other than client source
-address, so you should specify addresses of clients allowed to monitor the
-router. Note that SNMPv2 also supports no encryption and always sends data in
-plain text.
-
-Example
-*******
-
-.. code-block:: sh
-
-  # Define a community
-  set service snmp community routers authorization ro
-
-  # Allow monitoring access from the entire network
-  set service snmp community routers network 192.0.2.0/24
-  set service snmp community routers network 2001::db8:ffff:eeee::/64
-
-  # Allow monitoring access from specific addresses
-  set service snmp community routers client 203.0.113.10
-  set service snmp community routers client 203.0.113.20
-
-  # Define optional router information
-  set service snmp location "UK, London"
-  set service snmp contact "admin@example.com"
-
-  # Trap target if you want asynchronous communication
-  set service snmp trap-target 203.0.113.10
-
-  # Listen only on specific IP addresses (port defaults to 161)
-  set service snmp listen-address 172.16.254.36 port 161
-  set service snmp listen-address 2001:db8::f00::1
-
-
-SNMPv3
-^^^^^^
-
-SNMPv3 is an updated version that, among other things, supports encryption and
-cryptographic authentication of clients.
-
-Example
-*******
-
-.. code-block:: sh
-
-  set service snmp v3 engineid '0x0aa0d6c6f450'
-  set service snmp v3 group defaultgroup mode 'ro'
-  set service snmp v3 group defaultgroup seclevel 'priv'
-  set service snmp v3 group defaultgroup view 'defaultview'
-  set service snmp v3 view defaultview oid '1'
-
-  set service snmp v3 user testUser1 auth plaintext-key testUserKey1
-  set service snmp v3 user testUser1 auth type 'md5'
-  set service snmp v3 user testUser1 engineid '0x0aa0d6c6f450'
-  set service snmp v3 user testUser1 group 'defaultgroup'
-  set service snmp v3 user testUser1 mode 'ro'
-  set service snmp v3 user testUser1 privacy type aes
-  set service snmp v3 user testUser1 privacy plaintext-key testUserKey1
-
-After commit the resulting configuration will look like:
-
-.. note:: SNMPv3 keys won't we stored in plaintext. On ``commit`` the keys
-   will be encrypted and the encrypted key is based on the engineid!
-
-.. code-block:: sh
-
-  vyos@vyos# show service snmp
-   v3 {
-       engineid 0x0aa0d6c6f450
-       group defaultgroup {
-           mode ro
-           seclevel priv
-           view defaultview
-       }
-       user testUser1 {
-           auth {
-               encrypted-key 0x3b68d4162c2c817b8e9dfb6f08583e5d
-               type md5
-           }
-           engineid 0x0aa0d6c6f450
-           group defaultgroup
-           mode ro
-           privacy {
-               encrypted-key 0x3b68d4162c2c817b8e9dfb6f08583e5d
-               type aes
-           }
-       }
-       view defaultview {
-           oid 1 {
-           }
-       }
-   }
-
-SSH
----
-
-Secure Shell (SSH_) is a cryptographic network protocol for operating network
-services securely over an unsecured network.[1] The standard TCP port for SSH
-is 22. The best known example application is for remote login to computer
-systems by users.
-
-SSH provides a secure channel over an unsecured network in a client-server
-architecture, connecting an SSH client application with an SSH server. Common
-applications include remote command-line login and remote command execution,
-but any network service can be secured with SSH. The protocol specification
-distinguishes between two major versions, referred to as SSH-1 and SSH-2.
-
-The most visible application of the protocol is for access to shell accounts
-on Unix-like operating systems, but it sees some limited use on Windows as
-well. In 2015, Microsoft announced that they would include native support for
-SSH in a future release.
-
-SSH was designed as a replacement for Telnet and for unsecured remote shell
-protocols such as the Berkeley rlogin, rsh, and rexec protocols. Those protocols
-send information, notably passwords, in plaintext, rendering them susceptible
-to interception and disclosure using packet analysis. The encryption used by
-SSH is intended to provide confidentiality and integrity of data over an
-unsecured network, such as the Internet.
-
-Configuration
-^^^^^^^^^^^^^
-
-Enabling SSH only requires you to add ``service ssh port NN``, where 'NN' is
-the port you want SSH to listen on. By default, SSH runs on port 22.
-
-.. code-block:: sh
-
-  set service ssh port 22
-
-Options
-*******
-
-* Listening address - Specify the IPv4/IPv6 listening address for connection
-  requests. Multiple ``listen-address`` nodes can be defined.
-
-  :code:`set service ssh listen-address <address>`
-
-* Allow ``root`` login, this can be set to allow ``root`` logins on SSH
-  connections, however it is not advisable to use this setting as this bears
-  serious security risks. The default system user posesses all required
-  privileges.
-
-  :code:`set service ssh allow-root`
-
-* Allowed ciphers - A number of allowed ciphers can be specified, use multiple
-  occurances to allow multiple ciphers.
-
-  :code:`set service ssh ciphers <cipher>`
-
-  Available ciphers:
-
- * `3des-cbc`
- * `aes128-cbc`
- * `aes192-cbc`
- * `aes256-cbc`
- * `aes128-ctr`
- * `aes192-ctr`
- * `aes256-ctr`
- * `arcfour128`
- * `arcfour256`
- * `arcfour`
- * `blowfish-cbc`
- * `cast128-cbc`
-
-* Disable password authentication - If SSH key authentication is set up,
-  password-based user authetication can be disabled. This hardens security!
-
-  :code:`set service ssh disable-password-authentication`
-
-* Disable host validation - Disable the host validation through reverse DNS
-  lookups.
-
-  :code:`set service ssh disable-host-validation`
-
-* MAC algorithms - Specifies the available MAC (message authentication code)
-  algorithms. The MAC algorithm is used in protocol version 2 for data
-  integrity protection. Multiple algorithms can be entered.
-
-  :code:`set service ssh macs <macs>`
-
-  Supported MACs:
-
- * `hmac-md5`
- * `hmac-md5-96`
- * `hmac-ripemd160`
- * `hmac-sha1`
- * `hmac-sha1-96`
- * `hmac-sha2-256`
- * `hmac-sha2-512`
- * `umac-64@openssh.com`
- * `umac-128@openssh.com`
- * `hmac-md5-etm@openssh.com`
- * `hmac-md5-96-etm@openssh.com`
- * `hmac-ripemd160-etm@openssh.com`
- * `hmac-sha1-etm@openssh.com`
- * `hmac-sha1-96-etm@openssh.com`
- * `hmac-sha2-256-etm@openssh.com`
- * `hmac-sha2-512-etm@openssh.com`
- * `umac-64-etm@openssh.com`
- * `umac-128-etm@openssh.com`
-
-
-Key Authentication
-##################
-
-It is highly recommended to use SSH Key authentication. By default there is
-only one user (``vyos``), and you can assign any number of keys to that user.
-You can generate a ssh key with the ``ssh-keygen`` command on your local
-machine, which will (by default) save it as ``~/.ssh/id_rsa.pub`` which is in
-three parts:
-
- ``ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAA...VByBD5lKwEWB username@host.example.com``
-
-Only the type (``ssh-rsa``) and the key (``AAAB3N...``) are used. Note that
-the key will usually be several hundred characters long, and you will need to
-copy and paste it. Some terminal emulators may accidentally split this over
-several lines. Be attentive when you paste it that it only pastes as a single
-line. The third part is simply an identifier, and is for your own reference.
-
-
-**Assign SSH Key to user**
-
-Under the user (in this example, ``vyos``), add the public key and the type.
-The `identifier` is simply a string that is relevant to you.
-
-.. code-block:: sh
-
-  set system login user vyos authentication public-keys 'identifier' key "AAAAB3Nz...."
-  set system login user vyos authentication public-keys 'identifier' type ssh-rsa"
-
-You can assign multiple keys to the same user by changing the identifier. In
-the following example, both Unicron and xrobau will be able to SSH into VyOS
-as the ``vyos`` user using their own keys.
-
-.. code-block:: sh
-
-  set system login user vyos authentication public-keys 'Unicron' key "AAAAB3Nz...."
-  set system login user vyos authentication public-keys 'Unicron' type ssh-rsa
-  set system login user vyos authentication public-keys 'xrobau' key "AAAAQ39x...."
-  set system login user vyos authentication public-keys 'xrobau' type ssh-rsa
-
-TFTP
-----
-
-Trivial File Transfer Protocol (TFTP_) is a simple lockstep File Transfer
-Protocol which allows a client to get a file from or put a file onto a remote
-host. One of its primary uses is in the early stages of nodes booting from a
-local area network. TFTP has been used for this application because it is very
-simple to implement.
-
-Example
-^^^^^^^
-
-.. code-block:: sh
-
-  # If you want to enable uploads, else TFTP server will act as read-only (optional)
-  set service tftp-server allow-upload
-
-  # Directory for TFTP server content
-  set service tftp-server directory '/config/tftpboot'
-
-  # On which addresses we want to listen for incoming TFTP connections? (mandatory)
-  set service tftp-server listen-address '2001:db8:ffee::1'
-  set service tftp-server listen-address '10.10.1.1'
-
-.. note:: Choose your ``directory`` location carefully or you will loose the
-   content on image upgrades. Any directory under ``/config`` is save at this
-   will be migrated.
-
-.. note:: Configuring a listen-address is essential for the service to work.
-
-The resulting configuration will look like:
-
-.. code-block:: sh
-
-  vyos@vyos# show service
-   tftp-server {
-      allow-upload
-      directory /config/tftpboot
-      listen-address 2001:db8:ffee::1
-      listen-address 10.10.1.1
-   }
-
-Webproxy
---------
-
-The proxy service in VyOS is based on Squid3 and some related modules.
-
-Squid is a caching and forwarding HTTP web proxy. It has a wide variety of uses,
-including speeding up a web server by caching repeated requests, caching web,
-DNS and other computer network lookups for a group of people sharing network
-resources, and aiding security by filtering traffic. Although primarily used
-for HTTP and FTP, Squid includes limited support for several other protocols
-including Internet Gopher, SSL,[6] TLS and HTTPS. Squid does not support the
-SOCKS protocol.
-
-All examples here assumes that your inside ip address is ``192.168.0.1``.
-Replace with your own where applicable.
-
-URL Filtering is provided by Squidguard_.
-
-Configuration
-^^^^^^^^^^^^^^
-
-.. code-block:: sh
-
-  # Enable proxy service
-  set service webproxy listen-address 192.168.0.1
-
-  # By default it will listen to port 3128. If you wan't something else you have to define that.
-  set service webproxy listen-address 192.168.0.1 port 2050
-
-  # By default the transparent proxy on that interface is enabled. To disable that you simply
-  set service webproxy listen-address 192.168.0.1 disable-transparent
-
-  # Block specific urls
-  set service webproxy url-filtering squidguard local-block myspace.com
-
-  # If you want to you can log these blocks
-  set service webproxy url-filtering squidguard log local-block
-
-
-Options
-*******
-
-Filtering by category
-^^^^^^^^^^^^^^^^^^^^^
-
-If you wan't to use existing blacklists you have to create/download a database
-first. Otherwise you will not be able to commit the config changes.
-
-.. code-block:: sh
-
-  vyos@vyos# commit
-  [ service webproxy ]
-  Warning: no blacklists installed
-  Unknown block-category [ads] for policy [default]
-
-  [[service webproxy]] failed
-  Commit failed
-
-* Download/Update complete blacklist
-
-  :code:`update webproxy blacklists`
-
-* Download/Update partial blacklist
-
-  :code:`update webproxy blacklists category ads`
-
-  Use tab completion to get a list of categories.
-
-* To auto update the blacklist files
-
-  :code:`set service webproxy url-filtering squidguard auto-update update-hour 23`
-
-* To configure blocking add the following to the configuration
-
-  :code:`set service webproxy url-filtering squidguard block-category ads`
-
-  :code:`set service webproxy url-filtering squidguard block-category malware`
-
-Authentication
-^^^^^^^^^^^^^^
-
-TBD: https://wiki.vyos.net/wiki/Web_proxy_LDAP_authentication
-
-Adjusting cache size
-^^^^^^^^^^^^^^^^^^^^
-
-The size of the proxy cache can be adjusted by the user.
-
-.. code-block:: sh
-
-  set service webproxy cache-size
-   Possible completions:
-     <0-4294967295>
-                  Disk cache size in MB (default 100)
-     0            Disable disk caching
-     100
-
-.. _ddclient: http://sourceforge.net/p/ddclient/wiki/Home/
-.. _RFC2136: https://www.ietf.org/rfc/rfc2136.txt
-.. _`Cisco Discovery Protocol`: https://en.wikipedia.org/wiki/Cisco_Discovery_Protocol
-.. _`Foundry Discovery Protocol`: https://en.wikipedia.org/wiki/Foundry_Discovery_Protocol
-.. _`Multicast DNS`: https://en.wikipedia.org/wiki/Multicast_DNS
-.. _SSH: https://en.wikipedia.org/wiki/Secure_Shell
-.. _SNMP: https://en.wikipedia.org/wiki/Simple_Network_Management_Protocol
-.. _SNMPv2: https://en.wikipedia.org/wiki/Simple_Network_Management_Protocol#Version_2
-.. _SNMPv3: https://en.wikipedia.org/wiki/Simple_Network_Management_Protocol#Version_3
-.. _MIB: https://en.wikipedia.org/wiki/Management_information_base
-.. _TFTP: https://en.wikipedia.org/wiki/Trivial_File_Transfer_Protocol
-.. _Squid3: http://www.squid-cache.org/
-.. _Squidguard: http://www.squidguard.org/
-.. _`accel-ppp`: https://accel-ppp.org/
-
-Bypassing the webproxy
-^^^^^^^^^^^^^^^^^^^^^^
-
-Some services don't work correctly when being handled via a web proxy.
-So sometimes it is useful to bypass a transparent proxy:
-
-* To bypass the proxy for every request that is directed to a specific destination:
-
-  :code:`set service webproxy whitelist destination-address 1.2.3.4`
-
-  :code:`set service webproxy whitelist destination-address 4.5.6.0/24`
-
-
-* To bypass the proxy for every request that is coming from a specific source:
-
-  :code:`set service webproxy whitelist source-address 192.168.1.2`
-
-  :code:`set service webproxy whitelist source-address 192.168.2.0/24`
-
-  (This can be useful when a called service has many and/or often changing destination addresses - e.g. Netflix.)
diff --git a/docs/services/conntrack.rst b/docs/services/conntrack.rst
new file mode 100644
index 00000000..27db622d
--- /dev/null
+++ b/docs/services/conntrack.rst
@@ -0,0 +1,178 @@
+Conntrack
+---------
+
+One of the important features built on top of the Netfilter framework is
+connection tracking. Connection tracking allows the kernel to keep track of all
+logical network connections or sessions, and thereby relate all of the packets
+which may make up that connection. NAT relies on this information to translate
+all related packets in the same way, and iptables can use this information to
+act as a stateful firewall.
+
+The connection state however is completely independent of any upper-level
+state, such as TCP's or SCTP's state. Part of the reason for this is that when
+merely forwarding packets, i.e. no local delivery, the TCP engine may not
+necessarily be invoked at all. Even connectionless-mode transmissions such as
+UDP, IPsec (AH/ESP), GRE and other tunneling protocols have, at least, a pseudo
+connection state. The heuristic for such protocols is often based upon a preset
+timeout value for inactivity, after whose expiration a Netfilter connection is
+dropped.
+
+Each Netfilter connection is uniquely identified by a (layer-3 protocol, source
+address, destination address, layer-4 protocol, layer-4 key) tuple. The layer-4
+key depends on the transport protocol; for TCP/UDP it is the port numbers, for
+tunnels it can be their tunnel ID, but otherwise is just zero, as if it were
+not part of the tuple. To be able to inspect the TCP port in all cases, packets
+will be mandatorily defragmented.
+
+Configuration
+^^^^^^^^^^^^^
+
+.. code-block:: sh
+
+  # Protocols only for which local conntrack entries will be synced (tcp, udp, icmp, sctp)
+  set service conntrack-sync accept-protocol
+
+  # Queue size for listening to local conntrack events (in MB)
+  set service conntrack-sync event-listen-queue-size <int>
+
+  # Protocol for which expect entries need to be synchronized. (all, ftp, h323, nfs, sip, sqlnet)
+  set service conntrack-sync expect-sync
+
+  # Failover mechanism to use for conntrack-sync [REQUIRED]
+  set service conntrack-sync failover-mechanism
+
+  set service conntrack-sync cluster group <string>
+  set service conntrack-sync vrrp sync-group <1-255>
+
+  # IP addresses for which local conntrack entries will not be synced
+  set service conntrack-sync ignore-address ipv4 <x.x.x.x>
+
+  # Interface to use for syncing conntrack entries [REQUIRED]
+  set service conntrack-sync interface <ifname>
+
+  # Multicast group to use for syncing conntrack entries
+  set service conntrack-sync mcast-group <x.x.x.x>
+
+  # Queue size for syncing conntrack entries (in MB)
+  set service conntrack-sync sync-queue-size <size>
+
+Example
+^^^^^^^
+The next exemple is a simple configuration of conntrack-sync.
+
+
+.. figure:: /_static/images/service_conntrack_sync-schema.png
+   :scale: 60 %
+   :alt: Conntrack Sync Example
+
+   Conntrack Sync Example
+
+First of all, make sure conntrack is enabled by running
+
+.. code-block:: sh
+
+  show conntrack table ipv4
+
+If the table is empty and you have a warning message, it means conntrack is not
+enabled. To enable conntrack, just create a NAT or a firewall rule.
+
+.. code-block:: sh
+
+  set firewall state-policy established action accept
+
+You now should have a conntrack table
+
+.. code-block:: sh
+
+  $ show conntrack table ipv4
+  TCP state codes: SS - SYN SENT, SR - SYN RECEIVED, ES - ESTABLISHED,
+                   FW - FIN WAIT, CW - CLOSE WAIT, LA - LAST ACK,
+                   TW - TIME WAIT, CL - CLOSE, LI - LISTEN
+
+  CONN ID    Source                 Destination            Protocol         TIMEOUT
+  1015736576 10.35.100.87:58172     172.31.20.12:22        tcp [6] ES       430279
+  1006235648 10.35.101.221:57483    172.31.120.21:22       tcp [6] ES       413310
+  1006237088 10.100.68.100          172.31.120.21          icmp [1]         29
+  1015734848 10.35.100.87:56282     172.31.20.12:22        tcp [6] ES       300
+  1015734272 172.31.20.12:60286     239.10.10.14:694       udp [17]         29
+  1006239392 10.35.101.221          172.31.120.21          icmp [1]         29
+
+Now configure conntrack-sync service on ``router1`` **and** ``router2``
+
+.. code-block:: sh
+
+  set service conntrack-sync accept-protocol 'tcp,udp,icmp'
+  set service conntrack-sync event-listen-queue-size '8'
+  set service conntrack-sync failover-mechanism cluster group 'GROUP' # Or VRRP
+  set service conntrack-sync interface 'eth0'
+  set service conntrack-sync mcast-group '225.0.0.50'
+  set service conntrack-sync sync-queue-size '8'
+
+On the active router, you should have informations in the internal-cache of
+conntrack-sync. The same current active connections number should be shown in
+the external-cache of the standby router
+
+On active router run:
+
+
+.. code-block:: sh
+
+  $ show conntrack-sync statistics
+
+  Main Table Statistics:
+
+  cache internal:
+  current active connections:               10
+  connections created:                    8517    failed:            0
+  connections updated:                     127    failed:            0
+  connections destroyed:                  8507    failed:            0
+
+  cache external:
+  current active connections:                0
+  connections created:                       0    failed:            0
+  connections updated:                       0    failed:            0
+  connections destroyed:                     0    failed:            0
+
+  traffic processed:
+                     0 Bytes                         0 Pckts
+
+  multicast traffic (active device=eth0):
+                868780 Bytes sent               224136 Bytes recv
+                 20595 Pckts sent                14034 Pckts recv
+                     0 Error send                    0 Error recv
+
+  message tracking:
+                     0 Malformed msgs                    0 Lost msgs
+
+
+
+  On standby router run:
+
+
+  $ show conntrack-sync statistics
+
+  Main Table Statistics:
+
+  cache internal:
+  current active connections:                0
+  connections created:                       0    failed:            0
+  connections updated:                       0    failed:            0
+  connections destroyed:                     0    failed:            0
+
+  cache external:
+  current active connections:               10
+  connections created:                     888    failed:            0
+  connections updated:                     134    failed:            0
+  connections destroyed:                   878    failed:            0
+
+  traffic processed:
+                     0 Bytes                         0 Pckts
+
+  multicast traffic (active device=eth0):
+                234184 Bytes sent               907504 Bytes recv
+                 14663 Pckts sent                21495 Pckts recv
+                     0 Error send                    0 Error recv
+
+  message tracking:
+                     0 Malformed msgs                    0 Lost msgs
+
diff --git a/docs/services/dhcp-relay.rst b/docs/services/dhcp-relay.rst
new file mode 100644
index 00000000..c6bccb22
--- /dev/null
+++ b/docs/services/dhcp-relay.rst
@@ -0,0 +1,165 @@
+
+
+DHCP Relay
+----------
+
+If you want your router to forward DHCP requests to an external DHCP server
+you can configure the system to act as a DHCP relay agent. The DHCP relay
+agent works with IPv4 and IPv6 addresses.
+
+All interfaces used for the DHCP relay must be configured. See
+https://wiki.vyos.net/wiki/Network_address_setup.
+
+DHCP relay example
+^^^^^^^^^^^^^^^^^^
+
+.. figure:: /_static/images/service_dhcp-relay01.png
+   :scale: 80 %
+   :alt: DHCP relay example
+
+   DHCP relay example
+
+In this example the interfaces used for the DHCP relay are eth1 and eth2. The
+router receives DHCP client requests on eth1 and relays them through eth2 to
+the DHCP server at 10.0.1.4.
+
+Configuration
+^^^^^^^^^^^^^
+
+Enable DHCP relay for eth1 and eth2:
+
+.. code-block:: sh
+
+  set service dhcp-relay interface eth1
+  set service dhcp-relay interface eth2
+
+Set the IP address of the DHCP server:
+
+.. code-block:: sh
+
+  set service dhcp-relay server 10.0.1.4
+
+The router should discard DHCP packages already containing relay agent
+information to ensure that only requests from DHCP clients are forwarded:
+
+.. code-block:: sh
+
+  set service dhcp-relay relay-options relay-agents-packets discard
+
+Commit the changes and show the results:
+
+.. code-block:: sh
+
+  commit
+  show service dhcp-relay
+      interface eth1
+      interface eth2
+      server 10.0.1.4
+      relay-options {
+         relay-agents-packets discard
+      }
+
+The DHCP relay agent can be restarted with:
+
+.. code-block:: sh
+
+  restart dhcp relay-agent
+
+DHCPv6 relay example
+^^^^^^^^^^^^^^^^^^^^
+
+.. figure:: /_static/images/service_dhcpv6-relay01.png
+   :scale: 80 %
+   :alt: DHCPv6 relay example
+
+   DHCPv6 relay example
+
+In this example DHCPv6 requests are received by the router on eth1
+(`listening interface`) and forwarded through eth2 (`upstream interface`) to
+the external DHCPv6 server at 2001:db8:100::4.
+
+Configuration
+*************
+
+Set eth1 to be the listening interface for the DHCPv6 relay:
+
+.. code-block:: sh
+
+  set service dhcpv6-relay listen-interface eth1
+
+Set eth2 to be the upstream interface and specify the IPv6 address of
+the DHCPv6 server:
+
+.. code-block:: sh
+
+  set service dhcpv6-relay upstream-interface eth2 address 2001:db8:100::4
+
+Commit the changes and show results:
+
+.. code-block:: sh
+
+  commit
+  show service dhcpv6-relay
+      listen-interface eth1 {
+      }
+      upstream-interface eth2 {
+         address 2001:db8:100::4
+      }
+
+Show the current status of the DHCPv6 relay agent:
+
+.. code-block:: sh
+
+  show dhcpv6 relay-agent status
+
+The DHCPv6 relay agent can be restarted with:
+
+.. code-block:: sh
+
+  restart dhcpv6 relay-agent
+
+Additional parameters
+^^^^^^^^^^^^^^^^^^^^^
+
+DHCP relay agent options
+************************
+
+Set the maximum hop count before packets are discarded. Range 0...255,
+default 10.
+
+* :code:`set service dhcp-relay relay-options hop-count 'count'`
+
+Set maximum size of DHCP packets including relay agent information. If a
+DHCP packet size surpasses this value it will be forwarded without appending
+relay agent information. Range 64...1400, default 576.
+
+* :code:`set service dhcp-relay relay-options max-size 'size'`
+
+Four policies for reforwarding DHCP packets exist:
+
+* **append:** The relay agent is allowed to append its own relay information
+  to a received DHCP packet, disregarding relay information already present in
+  the packet.
+
+* **discard:** Received packets which already contain relay information will
+  be discarded.
+
+* **forward:** All packets are forwarded, relay information already present
+  will be ignored.
+
+* **replace:** Relay information already present in a packet is stripped and
+  replaced with the router's own relay information set.
+
+* :code:`set service dhcp-relay relay-options relay-agents-packet 'policy'`
+
+DHCPv6 relay agent options
+**************************
+
+Set maximum hop count before packets are discarded. Default: 10.
+
+* :code:`set service dhcpv6-relay max-hop-count 'count'`
+
+If this is set the relay agent will insert the interface ID. This option is
+set automatically if more than one listening interfaces are in use.
+
+* :code:`set service dhcpv6-relay use-interface-id-option`
diff --git a/docs/services/dhcp.rst b/docs/services/dhcp.rst
new file mode 100644
index 00000000..0fc01f04
--- /dev/null
+++ b/docs/services/dhcp.rst
@@ -0,0 +1,138 @@
+
+DHCP Server
+-----------
+
+Multiple DHCP Servers can be run from a single machine. Each DHCP service is
+identified by a `shared-network-name`.
+
+DHCP Server Example
+^^^^^^^^^^^^^^^^^^^
+
+In this example, we are offering address space in the 172.16.17.0/24 network,
+which is on eth1, and pppoe0 is our connection to the internet. We are using
+the network name `dhcpexample`.
+
+Prerequisites
+^^^^^^^^^^^^^
+
+Configuring the PPPoE interface is assumed to be done already, and appears
+on `pppoe0`
+
+Interface Configuration
+^^^^^^^^^^^^^^^^^^^^^^^
+
+.. code-block:: sh
+
+ set interface eth1 address 172.16.17.1/24
+
+Multiple ranges can be defined and can contain holes.
+
+.. code-block:: sh
+
+  set service dhcp-server shared-network-name dhcpexample authoritative
+  set service dhcp-server shared-network-name dhcpexample subnet 172.16.17.0/24 default-router 172.16.17.1
+  set service dhcp-server shared-network-name dhcpexample subnet 172.16.17.0/24 dns-server 172.16.17.1
+  set service dhcp-server shared-network-name dhcpexample subnet 172.16.17.0/24 lease 86400
+  set service dhcp-server shared-network-name dhcpexample subnet 172.16.17.0/24 range 0 start 172.16.17.100
+  set service dhcp-server shared-network-name dhcpexample subnet 172.16.17.0/24 range 0 stop 172.16.17.199
+
+
+Explanation
+^^^^^^^^^^^
+
+* :code:`set service dhcp-server shared-network-name dhcpexample authoritative`
+
+  This says that this device is the only DHCP server for this network. If other
+  devices are trying to offer DHCP leases, this machine will send 'DHCPNAK' to
+  any device trying to request an IP address that is
+  not valid for this network.
+
+* :code:`set service dhcp-server shared-network-name dhcpexample subnet
+  172.16.17.0/24 default-router 172.16.17.1`
+
+  This is a configuration parameter for the subnet, saying that as part of the
+  response, tell the client that I am the default router for this network
+
+* :code:`set service dhcp-server shared-network-name dhcpexample subnet
+  172.16.17.0/24 dns-server 172.16.17.1`
+
+  This is a configuration parameter for the subnet, saying that as part of the
+  response, tell the client that I am the DNS server for this network. If you
+  do not want to run a DNS server, you could also provide one of the public
+  DNS servers, such as google's. You can add multiple entries by repeating the
+  line.
+
+* :code:`set service dhcp-server shared-network-name dhcpexample subnet
+  172.16.17.0/24 lease 86400`
+
+  Assign the IP address to this machine for 24 hours. It is unlikely you'd need
+  to shorten this period, unless you are running a network with lots of devices
+  appearing and disappearing.
+
+
+* :code:`set service dhcp-server shared-network-name dhcpexample subnet
+  172.16.17.0/24 range 0 start 172.16.17.100`
+
+  Make a range of addresses available for clients starting from .100 [...]
+
+* :code:`set service dhcp-server shared-network-name dhcpexample subnet
+  172.16.17.0/24 range 0 stop 172.16.17.199`
+
+  [...] and ending at .199
+
+
+Failover
+^^^^^^^^
+
+VyOS provides support for DHCP failover:
+
+.. code-block:: sh
+
+  set service dhcp-server shared-network-name 'LAN' subnet '192.168.0.0/24' failover local-address '192.168.0.1'
+  set service dhcp-server shared-network-name 'LAN' subnet '192.168.0.0/24' failover name 'foo'
+  set service dhcp-server shared-network-name 'LAN' subnet '192.168.0.0/24' failover peer-address '192.168.0.2'
+
+.. note:: `name` must be identical on both sides!
+
+The primary and secondary statements determines whether the server is
+primary or secondary
+
+.. code-block:: sh
+
+  set service dhcp-server shared-network-name 'LAN' subnet '192.168.0.0/24' failover status 'primary'
+
+or
+
+.. code-block:: sh
+
+  set service dhcp-server shared-network-name 'LAN' subnet '192.168.0.0/24' failover status 'secondary'
+
+.. note:: In order for the primary and the secondary DHCP server to keep
+   their lease tables in sync, they must be able to reach each other on TCP
+   port 647. If you have firewall rules in effect, adjust them accordingly.
+
+Static mappings MAC/IP
+^^^^^^^^^^^^^^^^^^^^^^
+
+.. code-block:: sh
+
+  set service dhcp-server shared-network-name dhcpexample subnet 172.16.17.0/24 static-mapping static-mapping-01 ip-address 172.16.17.10
+  set service dhcp-server shared-network-name dhcpexample subnet 172.16.17.0/24 static-mapping static-mapping-01 mac-address ff:ff:ff:ff:ff:ff
+
+DHCP server options
+^^^^^^^^^^^^^^^^^^^^^^^^^
+
+default-router (DHCP option 003)
+  :code:`set service dhcp-server shared-network-name dhcpexample subnet 172.16.17.0/24 default-router <ROUTER-IP>`
+
+dns-server (DHCP option 006)
+  :code:`set service dhcp-server shared-network-name dhcpexample subnet 172.16.17.0/24 dns-server <DNS-SERVER-IP>`
+
+domain-name  Client domain name (DHCP option 015)
+  :code:`set service dhcp-server shared-network-name dhcpexample subnet 172.16.17.0/24 domain-name "<DOMAIN-NAME>"`
+
+domain-search (DHCP option 119)
+  This option can be given multiple times if you need multiple search domains
+  :code:`set service dhcp-server shared-network-name dhcpexample subnet 172.16.17.0/24 domain-search "<DOMAIN_NAME_1>"`
+  :code:`set service dhcp-server shared-network-name dhcpexample subnet 172.16.17.0/24 domain-search "<DOMAIN_NAME_2>"`
+
diff --git a/docs/services/dhcpv6.rst b/docs/services/dhcpv6.rst
new file mode 100644
index 00000000..e70b3eba
--- /dev/null
+++ b/docs/services/dhcpv6.rst
@@ -0,0 +1,305 @@
+
+DHCPv6 server
+-------------
+
+VyOS provides DHCPv6 server functionality which is described in this section.
+In order to use the DHCPv6 server it has to be enabled first:
+
+.. code-block:: sh
+
+  set service dhcpv6-server
+
+To restart the DHCPv6 server (operational mode):
+
+.. code-block:: sh
+
+  restart dhcpv6 server
+
+To show the current status of the DHCPv6 server use:
+
+.. code-block:: sh
+
+  show dhcpv6 server status
+
+Show statuses of all assigned leases:
+
+.. code-block:: sh
+
+  show dhcpv6 server leases
+
+DHCPv6 server options
+^^^^^^^^^^^^^^^^^^^^^
+
+DHCPv6 server preference value
+******************************
+
+Clients receiving advertise messages from multiple servers choose the server
+with the highest preference value. The range for this value is `0...255`. Set
+a preference value for the DHCPv6 server:
+
+.. code-block:: sh
+
+  set service dhcpv6-server preference <preference value>
+
+Delete a preference:
+
+.. code-block:: sh
+
+  set service dhcpv6-server preference
+
+Show current preference:
+
+.. code-block:: sh
+
+  show service dhcpv6-server preference
+
+Specify address lease time
+**************************
+
+The default lease time for DHCPv6 leases is 24 hours. This can be changed by
+supplying a `default-time`, `maximum-time` and `minimum-time` (all values in
+seconds):
+
+.. code-block:: sh
+
+  set service dhcpv6-server shared-network-name <name> subnet <ipv6net> lease-time {default <default-time> | maximum <maximum-time> | minimum <minimum-time>}
+
+Reset the custom lease times:
+
+.. code-block:: sh
+
+  delete service dhcpv6-server shared-network-name <name> subnet <ipv6net> lease-time {default | maximum | minimum}
+
+Show the current configuration:
+
+.. code-block:: sh
+
+  show service dhcpv6-server shared-network-name <name> subnet <ipv6net> lease-time {default | maximum | minimum}
+
+Specify NIS domain
+******************
+
+A Network Information (NIS) domain can be set to be used for DHCPv6 clients:
+
+.. code-block:: sh
+
+  set service dhcpv6-server shared-network-name <name> subnet <ipv6net> nis-domain <nis-domain-name>
+
+To Delete the NIS domain:
+
+.. code-block:: sh
+
+  delete service dhcpv6-server shared-network-name <name> subnet <ipv6net> nis-domain <nis-domain-name>
+
+Show a configured NIS domain:
+
+.. code-block:: sh
+
+  show service dhcpv6-server shared-network-name <name> subnet <ipv6net> nis-domain <nis-domain-name>
+
+Specify NIS+ domain
+*******************
+
+The procedure to specify a Network Information Service Plus (NIS+) domain is
+similar to the NIS domain one:
+
+.. code-block:: sh
+
+  set service dhcpv6-server shared-network-name <name> subnet <ipv6net> nisplus-domain <nisplus-domain-name>
+
+To Delete the NIS+ domain:
+
+.. code-block:: sh
+
+  delete service dhcpv6-server shared-network-name <name> subnet <ipv6net> nisplus-domain <nisplus-domain-name>
+
+Show a configured NIS domain:
+
+ # show service dhcpv6-server shared-network-name <name> subnet <ipv6net> nisplus-domain <nisplus-domain-name>
+
+Specify NIS server address
+**************************
+
+To specify a NIS server address for DHCPv6 clients:
+
+.. code-block:: sh
+
+  set service dhcpv6-server shared-network-name <name> subnet <ipv6net> nis-server <IPv6 address>
+
+Delete a specified NIS server address:
+
+.. code-block:: sh
+
+  delete service dhcpv6-server shared-network-name <name> subnet <ipv6net> nis-server <IPv6 address>
+
+Show specified NIS server addresses:
+
+.. code-block:: sh
+
+  show service dhcpv6-server shared-network-name <name> subnet <ipv6net> nis-server
+
+Specify NIS+ server address
+***************************
+
+To specify a NIS+ server address for DHCPv6 clients:
+
+.. code-block:: sh
+
+  set service dhcpv6-server shared-network-name <name> subnet <ipv6net> nisplus-server <IPv6 address>
+
+Delete a specified NIS+ server address:
+
+.. code-block:: sh
+
+  delete service dhcpv6-server shared-network-name <name> subnet <ipv6net> nisplus-server <IPv6 address>
+
+Show specified NIS+ server addresses:
+
+.. code-block:: sh
+
+  show service dhcpv6-server shared-network-name <name> subnet <ipv6net> nisplus-server
+
+Specify a SIP server address for DHCPv6 clients
+***********************************************
+
+By IPv6 address
+###############
+
+
+A Session Initiation Protocol (SIP) server address can be specified
+for DHCPv6 clients:
+
+.. code-block:: sh
+
+  set service dhcpv6-server shared-network-name <name> subnet <ipv6net> sip-server-address <IPv6 address>
+
+Delete a specified SIP server address:
+
+.. code-block:: sh
+
+  delete service dhcpv6-server shared-network-name <name> subnet <ipv6net> sip-server-address <IPv6 address>
+
+Show specified SIP server addresses:
+
+.. code-block:: sh
+
+  show service dhcpv6-server shared-network-name <name> subnet <ipv6net> sip-server-address
+
+By FQDN
+#######
+
+A name for SIP server can be specified:
+
+.. code-block:: sh
+
+  set service dhcpv6-server shared-network-name <name> subnet <ipv6net> sip-server-name <sip-server-name>
+
+Delete a specified SIP server name:
+
+.. code-block:: sh
+
+  delete service dhcpv6-server shared-network-name <name> subnet <ipv6net> sip-server-name <sip-server-name>
+
+Show specified SIP server names:
+
+.. code-block:: sh
+
+  show service dhcpv6-server shared-network-name <name> subnet <ipv6net> sip-server-name
+
+Simple Network Time Protocol (SNTP) server address for DHCPv6 clients
+*********************************************************************
+
+A SNTP server address can be specified for DHCPv6 clients:
+
+.. code-block:: sh
+
+  set service dhcpv6-server shared-network-name <name> subnet <ipv6net> sntp-server-address <IPv6 address>
+
+Delete a specified SNTP server address:
+
+.. code-block:: sh
+
+  delete service dhcpv6-server shared-network-name <name> subnet <ipv6net> sntp-server-address <IPv6 address>
+
+Show specified SNTP server addresses:
+
+.. code-block:: sh
+
+  show service dhcpv6-server shared-network-name <name> subnet <ipv6net> sntp-server-address
+
+DHCPv6 address pools
+^^^^^^^^^^^^^^^^^^^^
+
+DHCPv6 address pools must be configured for the system to act as a DHCPv6
+server. The following example describes a common scenario.
+
+Example 1: DHCPv6 address pool
+******************************
+
+A shared network named `NET1` serves subnet `2001:db8:100::/64` which is
+connected to `eth1`, a DNS server at `2001:db8:111::111` is used for name
+services. The range of the address pool shall be `::100` through `::199`. The
+lease time will be left at the default value which is 24 hours.
+
+.. code-block:: sh
+
+  set service dhcpv6-server shared-network-name NET1 subnet 2001:db8:100::/64 address-range start 2001:db8:100::100 stop 2001:db8:100::199
+  set service dhcpv6-server shared-network-name NET1 subnet 2001:db8:100::/64 name-server 2001:db8:111::111
+
+Commit the changes and show the configuration:
+
+.. code-block:: sh
+
+  commit
+  show service dhcpv6-server
+      shared-network-name NET1 {
+          subnet 2001:db8:100::/64 {
+             address-range {
+                start 2001:db8:100::100 {
+                   stop 2001:db8:100::199
+                }
+             }
+             name-server 2001:db8:111::111
+          }
+      }
+
+Static mappings
+^^^^^^^^^^^^^^^
+
+In order to map specific IPv6 addresses to specific hosts static mappings can
+be created. The following example explains the process.
+
+Example 1: Static IPv6 MAC-based mapping
+****************************************
+
+IPv6 address `2001:db8:100::101` shall be statically mapped to a device with
+MAC address `00:15:c5:b7:5e:23`, this host-specific mapping shall be named
+`client1`.
+
+.. note:: The MAC address identifier is defined by the last 4 byte of the
+   MAC address.
+
+.. code-block:: sh
+
+  set service dhcpv6-server shared-network-name NET1 subnet 2001:db8:100::/64 static-mapping client1 ipv6-address 2001:db8:100::101
+  set service dhcpv6-server shared-network-name NET1 subnet 2001:db8:100::/64 static-mapping client1 identifier c5b75e23
+
+Commit the changes and show the configuration:
+
+.. code-block:: sh
+
+  show service dhcp-server shared-network-name NET1
+     shared-network-name NET1 {
+         subnet 2001:db8:100::/64 {
+            name-server 2001:db8:111::111
+            address-range {
+                start 2001:db8:100::100 {
+                   stop 2001:db8:100::199 {
+                }
+            }
+            static-mapping client1 {
+               ipv6-address 2001:db8:100::101
+               identifier c5b75e23
+            }
+         }
+      }
diff --git a/docs/services/dns-forwarding.rst b/docs/services/dns-forwarding.rst
new file mode 100644
index 00000000..a8501c8f
--- /dev/null
+++ b/docs/services/dns-forwarding.rst
@@ -0,0 +1,59 @@
+DNS Forwarding
+--------------
+
+Use DNS forwarding if you want your router to function as a DNS server for the
+local network. There are several options, the easiest being 'forward all
+traffic to the system DNS server(s)' (defined with set system name-server):
+
+.. code-block:: sh
+
+  set service dns forwarding system
+
+Manually setting DNS servers for forwarding:
+
+.. code-block:: sh
+
+  set service dns forwarding name-server 8.8.8.8
+  set service dns forwarding name-server 8.8.4.4
+
+Manually setting DNS servers with IPv6 connectivity:
+
+.. code-block:: sh
+
+  set service dns forwarding name-server 2001:4860:4860::8888
+  set service dns forwarding name-server 2001:4860:4860::8844
+
+Setting a forwarding DNS server for a specific domain:
+
+.. code-block:: sh
+
+  set service dns forwarding domain example.com server 192.0.2.1
+
+Example 1
+^^^^^^^^^
+
+Router with two interfaces eth0 (WAN link) and eth1 (LAN). A DNS server for the
+local domain (example.com) is at 192.0.2.1, other DNS requests are forwarded
+to Google's DNS servers.
+
+.. code-block:: sh
+
+  set service dns forwarding domain example.com server 192.0.2.1
+  set service dns forwarding name-server 8.8.8.8
+  set service dns forwarding name-server 8.8.4.4
+  set service dns forwarding listen-on 'eth1'
+
+Example 2
+^^^^^^^^^
+
+Same as example 1 but with additional IPv6 addresses for Google's public DNS
+servers:
+
+.. code-block:: sh
+
+  set service dns forwarding domain example.com server 192.0.2.1
+  set service dns forwarding name-server 8.8.8.8
+  set service dns forwarding name-server 8.8.4.4
+  set service dns forwarding name-server 2001:4860:4860::8888
+  set service dns forwarding name-server 2001:4860:4860::8844
+  set service dns forwarding listen-on 'eth1'
diff --git a/docs/services/dynamic-dns.rst b/docs/services/dynamic-dns.rst
new file mode 100644
index 00000000..dcb9c155
--- /dev/null
+++ b/docs/services/dynamic-dns.rst
@@ -0,0 +1,153 @@
+Dynamic DNS
+-----------
+
+VyOS is able to update a remote DNS record when an interface gets a new IP
+address. In order to do so, VyOS includes ddclient_, a perl script written for
+this exact purpose.
+
+ddclient_ uses two methods to update a DNS record. The first one will send
+updates directly to the DNS daemon, in compliance with RFC2136_. The second
+one involves a third party service, like DynDNS.com or any other similar
+website. This method uses HTTP requests to transmit the new IP address. You
+can configure both in VyOS.
+
+VyOS CLI and RFC2136
+^^^^^^^^^^^^^^^^^^^^
+
+First, create an RFC2136_ config node :
+
+.. code-block:: sh
+
+  edit service dns dynamic interface eth0 rfc2136 <confignodename>
+
+Present your RNDC key to ddclient :
+
+.. code-block:: sh
+
+  set key /config/dyndns/mydnsserver.rndc.key
+
+Set the DNS server IP/FQDN :
+
+.. code-block:: sh
+
+  set server dns.mydomain.com
+
+Set the NS zone to be updated :
+
+.. code-block:: sh
+
+  set zone mydomain.com
+
+Set the records to be updated :
+
+.. code-block:: sh
+
+  set record dyn
+  set record dyn2
+
+You can optionally set a TTL (note : default value is 600 seconds) :
+
+.. code-block:: sh
+
+  set ttl 600
+
+This will generate the following ddclient config blocks:
+
+.. code-block:: sh
+
+  server=dns.mydomain.com
+  protocol=nsupdate
+  password=/config/dyndns/mydnsserver.rndc.key
+  ttl=600
+  zone=mydomain.com
+  dyn
+  server=dns.mydomain.com
+  protocol=nsupdate
+  password=/config/dyndns/mydnsserver.rndc.key
+  ttl=600
+  zone=mydomain.com
+  dyn2
+
+You can also keep a different dns zone updated. Just create a new config node:
+
+.. code-block:: sh
+
+  edit service dns dynamic interface eth0 rfc2136 <confignode2>
+
+VyOS CLI and HTTP dynamic DNS services
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+VyOS is also able to use any service relying on protocols supported
+by ddclient.
+
+To use such a service, you must define a login, a password, one or multiple
+hostnames, a protocol and a server.
+
+.. code-block:: sh
+
+  edit service dns dynamic interface eth0 service HeNet
+  set login my-login # set password my-password
+  set host-name my-tunnel-id
+  set protocol dyndns2
+  set server ipv4.tunnelbroker.net
+
+VyOS is also shipped with a list of known services. You don't need to set the
+protocol and server value as VyOS has defaults provided for those. These are
+the services VyOS knows about:
+
+* afraid
+* changeip
+* dnspark
+* dslreports
+* dyndns
+* easydns
+* namecheap
+* noip
+* zoneedit
+
+To use DynDNS for example:
+
+.. code-block:: sh
+
+  edit service dns dynamic interface eth0 service dyndns
+  set login my-login
+  set password my-password
+  set host-name my-dyndns-hostname
+
+It's possible to use multiple services :
+
+.. code-block:: sh
+
+  edit service dns dynamic interface eth0 service dyndns
+  set login my-login
+  set password my-password
+  set host-name my-dyndns-hostname
+  edit service dns dynamic interface eth0 service HeNet
+  set login my-login
+  set password my-password
+  set host-name my-tunnel-id
+  set protocol dyndns2
+  set server ipv4.tunnelbroker.net
+
+ddclient behind NAT
+^^^^^^^^^^^^^^^^^^^
+
+By default, ddclient will update a dynamic dns record using the IP address
+directly attached to the interface. If your VyOS instance is behind NAT, your
+record will be updated to point to your internal IP.
+
+ddclient_ has another way to determine the WAN IP address. This is controlled
+by these two options:
+
+.. code-block:: sh
+
+  set service dns dynamic interface eth0 use-web url
+  set service dns dynamic interface eth0 use-web skip
+
+ddclient_ will load the webpage at `[url]` and will try to extract an IP
+address for the response. ddclient_ will skip any address located before the
+string set in `[skip]`.
+
+
+.. _ddclient: http://sourceforge.net/p/ddclient/wiki/Home/
+.. _RFC2136: https://www.ietf.org/rfc/rfc2136.txt
diff --git a/docs/services/index.rst b/docs/services/index.rst
new file mode 100644
index 00000000..a138c961
--- /dev/null
+++ b/docs/services/index.rst
@@ -0,0 +1,24 @@
+.. _services:
+
+Services
+========
+
+This chapter descriptes the available system/network services provided by VyOS.
+
+.. toctree::
+
+   conntrack
+   dhcp
+   dhcpv6
+   dhcp-relay
+   dns-forwarding
+   dynamic-dns
+   lldp
+   mdns-repeater
+   pppoe-server
+   udp-broadcast-relay
+   snmp
+   ssh
+   tftp
+   udp-broadcast-relay
+   webproxy
diff --git a/docs/services/lldp.rst b/docs/services/lldp.rst
new file mode 100644
index 00000000..88df9b20
--- /dev/null
+++ b/docs/services/lldp.rst
@@ -0,0 +1,101 @@
+LLDP
+----
+
+The Link Layer Discovery Protocol (LLDP) is a vendor-neutral
+link layer protocol in the Internet Protocol Suite used by network devices for
+advertising their identity, capabilities, and neighbors on an IEEE 802 local
+area network, principally wired Ethernet.[1] The protocol is formally referred
+to by the IEEE as Station and Media Access Control Connectivity Discovery
+specified in IEEE 802.1AB and IEEE 802.3-2012 section 6 clause 79.
+
+LLDP performs functions similar to several proprietary protocols, such as
+`Cisco Discovery Protocol`_, `Foundry Discovery Protocol`_,
+Nortel Discovery Protocol and Link Layer Topology Discovery.
+
+Information gathered
+^^^^^^^^^^^^^^^^^^^^
+
+Information gathered with LLDP is stored in the device as a management
+information database (MIB_) and can be queried with the Simple Network
+Management Protocol (SNMP_) as specified in RFC 2922. The topology of an
+LLDP-enabled network can be discovered by crawling the hosts and querying this
+database. Information that may be retrieved include:
+
+* System name and description
+* Port name and description
+* VLAN name
+* IP management address
+* System capabilities (switching, routing, etc.)
+* MAC/PHY information
+* MDI power
+* Link aggregation
+
+Configuration
+^^^^^^^^^^^^^
+
+* Enable service with:
+
+  :code:`set service lldp`
+
+Options
+*******
+
+* Configure a Define management-address:
+
+  :code:`set service lldp management-address <x.x.x.x>`
+
+* Define listening interfaces
+
+  :code:`set service lldp interface <all|interface name>`
+
+* LLDPd also implements an SNMP subagent. To Enable SNMP queries of the LLDP
+  database:
+
+  :code:`set service lldp snmp enable`
+
+* Enable optional/other protocols
+
+  :code:`set service lldp legacy-protocols cdp`
+
+  Supported legacy protocols:
+
+ * ``cdp`` - Listen for CDP for Cisco routers/switches
+ * ``edp`` - Listen for EDP for Extreme routers/switches
+ * ``fdp`` - Listen for FDP for Foundry routers/switches
+ * ``sonmp`` - Listen for SONMP for Nortel routers/switches
+
+
+Display neighbors
+^^^^^^^^^^^^^^^^^
+
+* Display with:
+
+``show lldp neighbors``
+
+Exemple:
+
+.. code-block:: sh
+
+  vyos@vyos:~# show lldp neighbors
+  Capability Codes: R - Router, B - Bridge, W - Wlan r - Repeater, S - Station
+                   D - Docsis, T - Telephone, O - Other
+  Device ID                 Local  Proto  Cap   Platform             Port ID
+  ---------                 -----  -----  ---   --------             -------
+  swA309                    eth0   LLDP   ?     Cisco IOS Software,  GigE0/33
+
+
+* Options:
+
+ * ``detail`` - Show lldp neighbors detail
+ * ``interface`` - Show LLDP for specified interface
+
+Troubleshooting
+^^^^^^^^^^^^^^^
+
+Use operationnal command ``show log lldp`` to display logs.
+
+
+.. _`Cisco Discovery Protocol`: https://en.wikipedia.org/wiki/Cisco_Discovery_Protocol
+.. _`Foundry Discovery Protocol`: https://en.wikipedia.org/wiki/Foundry_Discovery_Protocol
+.. _MIB: https://en.wikipedia.org/wiki/Management_information_base
+.. _SNMP: https://en.wikipedia.org/wiki/Simple_Network_Management_Protocol
diff --git a/docs/services/mdns-repeater.rst b/docs/services/mdns-repeater.rst
new file mode 100644
index 00000000..0afdc90a
--- /dev/null
+++ b/docs/services/mdns-repeater.rst
@@ -0,0 +1,30 @@
+mDNS Repeater
+-------------
+
+Starting with VyOS 1.2 a `Multicast DNS`_ (mDNS) repeater functionality is
+provided.
+
+Multicast DNS uses the 224.0.0.51 address, which is "administratively scoped"
+and does not leave the subnet. It re-broadcast mDNS packets from one interface
+to other interfaces. This enables support for e.g. Apple Airplay devices across
+multiple VLANs.
+
+To enable mDNS repeater you need to configure at least two interfaces. To re-
+broadcast all mDNS packets from `eth0` to `eth1` and vice versa run:
+
+.. code-block:: sh
+
+  set service mdns repeater interface eth0
+  set service mdns repeater interface eth1
+
+mDNS repeater can be temporarily disabled without deleting the service using
+
+.. code-block:: sh
+
+  set service mdns repeater disable
+
+.. note:: You can not run this in a VRRP setup, if multiple mDNS repeaters
+   are launched in a subnet you will experience the mDNS packet storm death!
+
+
+.. _`Multicast DNS`: https://en.wikipedia.org/wiki/Multicast_DNS
diff --git a/docs/services/pppoe-server.rst b/docs/services/pppoe-server.rst
new file mode 100644
index 00000000..1316898e
--- /dev/null
+++ b/docs/services/pppoe-server.rst
@@ -0,0 +1,56 @@
+PPPoE server
+------------
+
+VyOS utilizes `accel-ppp`_ to provide PPPoE server functionality. It can be
+used with local authentication or a connected RADIUS server.
+
+.. note:: Please be aware, due to an upstream bug, config changes/commits
+   will restart the ppp daemon and will reset existing PPPoE connections from
+   connected users, in order to become effective.**
+
+Configuration
+^^^^^^^^^^^^^
+
+The example below uses ACN as access-concentrator name, assigns an address
+from the pool 10.1.1.100-111, terminates at the local endpoint 10.1.1.1 and
+serves requests only on eth1.
+
+.. code-block:: sh
+
+  set service pppoe-server access-concentrator 'ACN'
+  set service pppoe-server authentication local-users username foo password 'bar'
+  set service pppoe-server authentication mode 'local'
+  set service pppoe-server client-ip-pool start '10.1.1.100'
+  set service pppoe-server client-ip-pool stop '10.1.1.111'
+  set service pppoe-server dns-servers server-1 '10.100.100.1'
+  set service pppoe-server dns-servers server-2 '10.100.200.1'
+  set service pppoe-server interface 'eth1'
+  set service pppoe-server local-ip '10.1.1.2'
+
+
+Connections can be locally checked via the command
+
+.. code-block:: sh
+
+  show pppoe-server sessions
+  ifname | username |    calling-sid    |     ip     | type  | comp | state  |  uptime
+  -------+----------+-------------------+------------+-------+------+--------+----------
+  ppp0   | foo      | 08:00:27:fa:3e:50 | 10.1.1.100 | pppoe |      | active | 00:04:15
+
+
+To use a radius server, you need to switch to authentication mode radius and
+of course need to specify an IP for the server. You can have multiple RADIUS
+server configured, if you wish to achieve redundancy.
+
+.. code-block:: sh
+
+  set service pppoe-server access-concentrator 'ACN'
+  set service pppoe-server authentication mode 'radius'
+  set service pppoe-server authentication radius-server 10.1.100.1 secret 'secret'
+  set service pppoe-server interface 'eth1'
+  set service pppoe-server local-ip '10.1.1.2'
+
+RADIUS provides the IP addresses in the example above via Framed-IP-Address.
+
+
+.. _`accel-ppp`: https://accel-ppp.org/
diff --git a/docs/services/snmp.rst b/docs/services/snmp.rst
new file mode 100644
index 00000000..ac79f700
--- /dev/null
+++ b/docs/services/snmp.rst
@@ -0,0 +1,183 @@
+SNMP
+----
+
+Simple Network Management Protocol (SNMP_) is an Internet Standard protocol
+for collecting and organizing information about managed devices on IP networks
+and for modifying that information to change device behavior. Devices that
+typically support SNMP include cable modems, routers, switches, servers,
+workstations, printers, and more.
+
+SNMP is widely used in network management for network monitoring. SNMP exposes
+management data in the form of variables on the managed systems organized in
+a management information base (MIB_) which describe the system status and
+configuration. These variables can then be remotely queried (and, in some
+circumstances, manipulated) by managing applications.
+
+Three significant versions of SNMP have been developed and deployed. SNMPv1 is
+the original version of the protocol. More recent versions, SNMPv2c and SNMPv3,
+feature improvements in performance, flexibility and security.
+
+SNMP is a component of the Internet Protocol Suite as defined by the Internet
+Engineering Task Force (IETF). It consists of a set of standards for network
+management, including an application layer protocol, a database schema, and a
+set of data objects.
+
+Overview and basic concepts
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+In typical uses of SNMP, one or more administrative computers called managers
+have the task of monitoring or managing a group of hosts or devices on a
+computer network. Each managed system executes a software component called an
+agent which reports information via SNMP to the manager.
+
+An SNMP-managed network consists of three key components:
+
+* Managed devices
+
+* Agent – software which runs on managed devices
+
+* Network management station (NMS) – software which runs on the manager
+
+A managed device is a network node that implements an SNMP interface that
+allows unidirectional (read-only) or bidirectional (read and write) access to
+node-specific information. Managed devices exchange node-specific information
+with the NMSs. Sometimes called network elements, the managed devices can be
+any type of device, including, but not limited to, routers, access servers,
+switches, cable modems, bridges, hubs, IP telephones, IP video cameras,
+computer hosts, and printers.
+
+An agent is a network-management software module that resides on a managed
+device. An agent has local knowledge of management information and translates
+that information to or from an SNMP-specific form.
+
+A network management station executes applications that monitor and control
+managed devices. NMSs provide the bulk of the processing and memory resources
+required for network management. One or more NMSs may exist on any managed
+network.
+
+.. figure:: /_static/images/service_snmp_communication_principles_diagram.png
+   :scale: 20 %
+   :alt: Principle of SNMP Communication
+
+   Image thankfully borrowed from
+   https://en.wikipedia.org/wiki/File:SNMP_communication_principles_diagram.PNG
+   which is under the GNU Free Documentation License
+
+.. note:: VyOS SNMP supports both IPv4 and IPv6.
+
+SNMP protocol versions
+^^^^^^^^^^^^^^^^^^^^^^
+
+VyOS itself supports SNMPv2_ (version 2) and SNMPv3_ (version 3) where the
+later is recommended because of improved security (optional authentication and
+encryption).
+
+SNMPv2
+^^^^^^
+
+SNMPv2 is the original and most commonly used version. For authorizing clients,
+SNMP uses the concept of communities. Communities may have authorization set
+to read only (this is most common) or to read and write (this option is not
+actively used in VyOS).
+
+SNMP can work synchronously or asynchronously. In synchronous communication,
+the monitoring system queries the router periodically. In asynchronous, the
+router sends notification to the "trap" (the monitoring host).
+
+SNMPv2 does not support any authentication mechanisms, other than client source
+address, so you should specify addresses of clients allowed to monitor the
+router. Note that SNMPv2 also supports no encryption and always sends data in
+plain text.
+
+Example
+*******
+
+.. code-block:: sh
+
+  # Define a community
+  set service snmp community routers authorization ro
+
+  # Allow monitoring access from the entire network
+  set service snmp community routers network 192.0.2.0/24
+  set service snmp community routers network 2001::db8:ffff:eeee::/64
+
+  # Allow monitoring access from specific addresses
+  set service snmp community routers client 203.0.113.10
+  set service snmp community routers client 203.0.113.20
+
+  # Define optional router information
+  set service snmp location "UK, London"
+  set service snmp contact "admin@example.com"
+
+  # Trap target if you want asynchronous communication
+  set service snmp trap-target 203.0.113.10
+
+  # Listen only on specific IP addresses (port defaults to 161)
+  set service snmp listen-address 172.16.254.36 port 161
+  set service snmp listen-address 2001:db8::f00::1
+
+
+SNMPv3
+^^^^^^
+
+SNMPv3 is an updated version that, among other things, supports encryption and
+cryptographic authentication of clients.
+
+Example
+*******
+
+.. code-block:: sh
+
+  set service snmp v3 engineid '0x0aa0d6c6f450'
+  set service snmp v3 group defaultgroup mode 'ro'
+  set service snmp v3 group defaultgroup seclevel 'priv'
+  set service snmp v3 group defaultgroup view 'defaultview'
+  set service snmp v3 view defaultview oid '1'
+
+  set service snmp v3 user testUser1 auth plaintext-key testUserKey1
+  set service snmp v3 user testUser1 auth type 'md5'
+  set service snmp v3 user testUser1 engineid '0x0aa0d6c6f450'
+  set service snmp v3 user testUser1 group 'defaultgroup'
+  set service snmp v3 user testUser1 mode 'ro'
+  set service snmp v3 user testUser1 privacy type aes
+  set service snmp v3 user testUser1 privacy plaintext-key testUserKey1
+
+After commit the resulting configuration will look like:
+
+.. note:: SNMPv3 keys won't we stored in plaintext. On ``commit`` the keys
+   will be encrypted and the encrypted key is based on the engineid!
+
+.. code-block:: sh
+
+  vyos@vyos# show service snmp
+   v3 {
+       engineid 0x0aa0d6c6f450
+       group defaultgroup {
+           mode ro
+           seclevel priv
+           view defaultview
+       }
+       user testUser1 {
+           auth {
+               encrypted-key 0x3b68d4162c2c817b8e9dfb6f08583e5d
+               type md5
+           }
+           engineid 0x0aa0d6c6f450
+           group defaultgroup
+           mode ro
+           privacy {
+               encrypted-key 0x3b68d4162c2c817b8e9dfb6f08583e5d
+               type aes
+           }
+       }
+       view defaultview {
+           oid 1 {
+           }
+       }
+   }
+
+
+.. _SNMP: https://en.wikipedia.org/wiki/Simple_Network_Management_Protocol
+.. _SNMPv2: https://en.wikipedia.org/wiki/Simple_Network_Management_Protocol#Version_2
+.. _SNMPv3: https://en.wikipedia.org/wiki/Simple_Network_Management_Protocol#Version_3
+.. _MIB: https://en.wikipedia.org/wiki/Management_information_base
diff --git a/docs/services/ssh.rst b/docs/services/ssh.rst
new file mode 100644
index 00000000..a8da9154
--- /dev/null
+++ b/docs/services/ssh.rst
@@ -0,0 +1,150 @@
+SSH
+---
+
+Secure Shell (SSH_) is a cryptographic network protocol for operating network
+services securely over an unsecured network.[1] The standard TCP port for SSH
+is 22. The best known example application is for remote login to computer
+systems by users.
+
+SSH provides a secure channel over an unsecured network in a client-server
+architecture, connecting an SSH client application with an SSH server. Common
+applications include remote command-line login and remote command execution,
+but any network service can be secured with SSH. The protocol specification
+distinguishes between two major versions, referred to as SSH-1 and SSH-2.
+
+The most visible application of the protocol is for access to shell accounts
+on Unix-like operating systems, but it sees some limited use on Windows as
+well. In 2015, Microsoft announced that they would include native support for
+SSH in a future release.
+
+SSH was designed as a replacement for Telnet and for unsecured remote shell
+protocols such as the Berkeley rlogin, rsh, and rexec protocols.
+Those protocols send information, notably passwords, in plaintext,
+rendering them susceptible to interception and disclosure using packet
+analysis. The encryption used by SSH is intended to provide confidentiality
+and integrity of data over an unsecured network, such as the Internet.
+
+Configuration
+^^^^^^^^^^^^^
+
+Enabling SSH only requires you to add ``service ssh port NN``, where 'NN' is
+the port you want SSH to listen on. By default, SSH runs on port 22.
+
+.. code-block:: sh
+
+  set service ssh port 22
+
+Options
+*******
+
+* Listening address - Specify the IPv4/IPv6 listening address for connection
+  requests. Multiple ``listen-address`` nodes can be defined.
+
+  :code:`set service ssh listen-address <address>`
+
+* Allow ``root`` login, this can be set to allow ``root`` logins on SSH
+  connections, however it is not advisable to use this setting as this bears
+  serious security risks. The default system user posesses all required
+  privileges.
+
+  :code:`set service ssh allow-root`
+
+* Allowed ciphers - A number of allowed ciphers can be specified, use multiple
+  occurances to allow multiple ciphers.
+
+  :code:`set service ssh ciphers <cipher>`
+
+  Available ciphers:
+
+ * `3des-cbc`
+ * `aes128-cbc`
+ * `aes192-cbc`
+ * `aes256-cbc`
+ * `aes128-ctr`
+ * `aes192-ctr`
+ * `aes256-ctr`
+ * `arcfour128`
+ * `arcfour256`
+ * `arcfour`
+ * `blowfish-cbc`
+ * `cast128-cbc`
+
+* Disable password authentication - If SSH key authentication is set up,
+  password-based user authetication can be disabled. This hardens security!
+
+  :code:`set service ssh disable-password-authentication`
+
+* Disable host validation - Disable the host validation through reverse DNS
+  lookups.
+
+  :code:`set service ssh disable-host-validation`
+
+* MAC algorithms - Specifies the available MAC (message authentication code)
+  algorithms. The MAC algorithm is used in protocol version 2 for data
+  integrity protection. Multiple algorithms can be entered.
+
+  :code:`set service ssh macs <macs>`
+
+  Supported MACs:
+
+ * `hmac-md5`
+ * `hmac-md5-96`
+ * `hmac-ripemd160`
+ * `hmac-sha1`
+ * `hmac-sha1-96`
+ * `hmac-sha2-256`
+ * `hmac-sha2-512`
+ * `umac-64@openssh.com`
+ * `umac-128@openssh.com`
+ * `hmac-md5-etm@openssh.com`
+ * `hmac-md5-96-etm@openssh.com`
+ * `hmac-ripemd160-etm@openssh.com`
+ * `hmac-sha1-etm@openssh.com`
+ * `hmac-sha1-96-etm@openssh.com`
+ * `hmac-sha2-256-etm@openssh.com`
+ * `hmac-sha2-512-etm@openssh.com`
+ * `umac-64-etm@openssh.com`
+ * `umac-128-etm@openssh.com`
+
+
+Key Authentication
+##################
+
+It is highly recommended to use SSH Key authentication. By default there is
+only one user (``vyos``), and you can assign any number of keys to that user.
+You can generate a ssh key with the ``ssh-keygen`` command on your local
+machine, which will (by default) save it as ``~/.ssh/id_rsa.pub`` which is in
+three parts:
+
+ ``ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAA...VByBD5lKwEWB username@host.example.com``
+
+Only the type (``ssh-rsa``) and the key (``AAAB3N...``) are used. Note that
+the key will usually be several hundred characters long, and you will need to
+copy and paste it. Some terminal emulators may accidentally split this over
+several lines. Be attentive when you paste it that it only pastes as a single
+line. The third part is simply an identifier, and is for your own reference.
+
+
+**Assign SSH Key to user**
+
+Under the user (in this example, ``vyos``), add the public key and the type.
+The `identifier` is simply a string that is relevant to you.
+
+.. code-block:: sh
+
+  set system login user vyos authentication public-keys 'identifier' key "AAAAB3Nz...."
+  set system login user vyos authentication public-keys 'identifier' type ssh-rsa"
+
+You can assign multiple keys to the same user by changing the identifier. In
+the following example, both Unicron and xrobau will be able to SSH into VyOS
+as the ``vyos`` user using their own keys.
+
+.. code-block:: sh
+
+  set system login user vyos authentication public-keys 'Unicron' key "AAAAB3Nz...."
+  set system login user vyos authentication public-keys 'Unicron' type ssh-rsa
+  set system login user vyos authentication public-keys 'xrobau' key "AAAAQ39x...."
+  set system login user vyos authentication public-keys 'xrobau' type ssh-rsa
+
+
+.. _SSH: https://en.wikipedia.org/wiki/Secure_Shell
diff --git a/docs/services/tftp.rst b/docs/services/tftp.rst
new file mode 100644
index 00000000..524c8e5e
--- /dev/null
+++ b/docs/services/tftp.rst
@@ -0,0 +1,44 @@
+TFTP
+----
+
+Trivial File Transfer Protocol (TFTP_) is a simple lockstep File Transfer
+Protocol which allows a client to get a file from or put a file onto a remote
+host. One of its primary uses is in the early stages of nodes booting from a
+local area network. TFTP has been used for this application because it is very
+simple to implement.
+
+Example
+^^^^^^^
+
+.. code-block:: sh
+
+  # If you want to enable uploads, else TFTP server will act as read-only (optional)
+  set service tftp-server allow-upload
+
+  # Directory for TFTP server content
+  set service tftp-server directory '/config/tftpboot'
+
+  # On which addresses we want to listen for incoming TFTP connections? (mandatory)
+  set service tftp-server listen-address '2001:db8:ffee::1'
+  set service tftp-server listen-address '10.10.1.1'
+
+.. note:: Choose your ``directory`` location carefully or you will loose the
+   content on image upgrades. Any directory under ``/config`` is save at this
+   will be migrated.
+
+.. note:: Configuring a listen-address is essential for the service to work.
+
+The resulting configuration will look like:
+
+.. code-block:: sh
+
+  vyos@vyos# show service
+   tftp-server {
+      allow-upload
+      directory /config/tftpboot
+      listen-address 2001:db8:ffee::1
+      listen-address 10.10.1.1
+   }
+
+
+.. _TFTP: https://en.wikipedia.org/wiki/Trivial_File_Transfer_Protocol
diff --git a/docs/services/udp-broadcast-relay.rst b/docs/services/udp-broadcast-relay.rst
new file mode 100644
index 00000000..9ea53826
--- /dev/null
+++ b/docs/services/udp-broadcast-relay.rst
@@ -0,0 +1,53 @@
+UDP broadcast relay
+-------------------
+
+Certain vendors use broadcasts to identify their equipemnt within one ethernet
+segment. Unfortunately if you split your network with multiple VLANs you loose
+the ability of identifying your equiment.
+
+This is where "UDP broadcast relay" comes into play! It will forward received
+broadcasts to other configured networks.
+
+Every UDP port which will be forward requires one unique ID. Currently we
+support 99 IDs!
+
+Example #1: To forward all broadcast packets received on `UDP port 1900` on
+`eth3`, `eth4` or `eth5` to all other interfaces in this configuration.
+
+.. code-block:: sh
+
+  set service broadcast-relay id 1 description 'SONOS'
+  set service broadcast-relay id 1 interface 'eth3'
+  set service broadcast-relay id 1 interface 'eth4'
+  set service broadcast-relay id 1 interface 'eth5'
+  set service broadcast-relay id 1 port '1900'
+
+Example #2: To Forward all broadcasts packets received on `UDP port 6969` on
+`eth3` or `eth4` to the other interface in this configuration.
+
+.. code-block:: sh
+
+  set service broadcast-relay id 2 description 'SONOS MGMT'
+  set service broadcast-relay id 2 interface 'eth3'
+  set service broadcast-relay id 2 interface 'eth4'
+  set service broadcast-relay id 2 port '6969'
+
+Disable Instance(s)
+^^^^^^^^^^^^^^^^^^^
+
+Each broadcast relay instance can be individually disabled without deleting the
+configured node by using the following command:
+
+.. code-block:: sh
+
+  set service broadcast-relay id <n> disable
+
+In addition you can also disable the whole service without removing the
+configuration by:
+
+.. code-block:: sh
+
+  set service broadcast-relay disable
+
+.. note:: You can run the UDP broadcast relay service on multiple routers
+   connected to a subnet. There is **NO** UDP broadcast relay packet storm!
diff --git a/docs/services/webproxy.rst b/docs/services/webproxy.rst
new file mode 100644
index 00000000..b739e479
--- /dev/null
+++ b/docs/services/webproxy.rst
@@ -0,0 +1,123 @@
+Webproxy
+--------
+
+The proxy service in VyOS is based on Squid3 and some related modules.
+
+Squid is a caching and forwarding HTTP web proxy. It has a wide variety of
+uses, including speeding up a web server by caching repeated requests,
+caching web, DNS and other computer network lookups for a group of people
+sharing network resources, and aiding security by filtering traffic. Although
+primarily used for HTTP and FTP, Squid includes limited support for several
+other protocols including Internet Gopher, SSL,[6] TLS and HTTPS. Squid does
+not support the SOCKS protocol.
+
+All examples here assumes that your inside ip address is ``192.168.0.1``.
+Replace with your own where applicable.
+
+URL Filtering is provided by Squidguard_.
+
+Configuration
+^^^^^^^^^^^^^^
+
+.. code-block:: sh
+
+  # Enable proxy service
+  set service webproxy listen-address 192.168.0.1
+
+  # By default it will listen to port 3128. If you wan't something else you have to define that.
+  set service webproxy listen-address 192.168.0.1 port 2050
+
+  # By default the transparent proxy on that interface is enabled. To disable that you simply
+  set service webproxy listen-address 192.168.0.1 disable-transparent
+
+  # Block specific urls
+  set service webproxy url-filtering squidguard local-block myspace.com
+
+  # If you want to you can log these blocks
+  set service webproxy url-filtering squidguard log local-block
+
+
+Options
+*******
+
+Filtering by category
+^^^^^^^^^^^^^^^^^^^^^
+
+If you wan't to use existing blacklists you have to create/download a database
+first. Otherwise you will not be able to commit the config changes.
+
+.. code-block:: sh
+
+  vyos@vyos# commit
+  [ service webproxy ]
+  Warning: no blacklists installed
+  Unknown block-category [ads] for policy [default]
+
+  [[service webproxy]] failed
+  Commit failed
+
+* Download/Update complete blacklist
+
+  :code:`update webproxy blacklists`
+
+* Download/Update partial blacklist
+
+  :code:`update webproxy blacklists category ads`
+
+  Use tab completion to get a list of categories.
+
+* To auto update the blacklist files
+
+  :code:`set service webproxy url-filtering squidguard auto-update update-hour 23`
+
+* To configure blocking add the following to the configuration
+
+  :code:`set service webproxy url-filtering squidguard block-category ads`
+
+  :code:`set service webproxy url-filtering squidguard block-category malware`
+
+Authentication
+^^^^^^^^^^^^^^
+
+TBD: https://wiki.vyos.net/wiki/Web_proxy_LDAP_authentication
+
+Adjusting cache size
+^^^^^^^^^^^^^^^^^^^^
+
+The size of the proxy cache can be adjusted by the user.
+
+.. code-block:: sh
+
+  set service webproxy cache-size
+   Possible completions:
+     <0-4294967295>
+                  Disk cache size in MB (default 100)
+     0            Disable disk caching
+     100
+
+Bypassing the webproxy
+^^^^^^^^^^^^^^^^^^^^^^
+
+Some services don't work correctly when being handled via a web proxy.
+So sometimes it is useful to bypass a transparent proxy:
+
+* To bypass the proxy for every request that is directed to a specific
+  destination:
+
+  :code:`set service webproxy whitelist destination-address 1.2.3.4`
+
+  :code:`set service webproxy whitelist destination-address 4.5.6.0/24`
+
+
+* To bypass the proxy for every request that is coming from a specific source:
+
+  :code:`set service webproxy whitelist source-address 192.168.1.2`
+
+  :code:`set service webproxy whitelist source-address 192.168.2.0/24`
+
+  (This can be useful when a called service has many and/or often changing
+  destination addresses - e.g. Netflix.)
+
+
+.. _Squid3: http://www.squid-cache.org/
+.. _Squidguard: http://www.squidguard.org/