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Diffstat (limited to 'docs')
| -rw-r--r-- | docs/index.rst | 2 | ||||
| -rw-r--r-- | docs/vpn.rst | 929 | ||||
| -rw-r--r-- | docs/vpn/dmvpn.rst | 410 | ||||
| -rw-r--r-- | docs/vpn/index.rst | 17 | ||||
| -rw-r--r-- | docs/vpn/l2tp_ipsec.rst | 124 | ||||
| -rw-r--r-- | docs/vpn/openvpn.rst | 222 | ||||
| -rw-r--r-- | docs/vpn/pptp.rst | 47 | ||||
| -rw-r--r-- | docs/vpn/references.rst | 10 | ||||
| -rw-r--r-- | docs/vpn/site2site_ipsec.rst | 109 |
9 files changed, 940 insertions, 930 deletions
diff --git a/docs/index.rst b/docs/index.rst index 983ddc6f..7b416d34 100644 --- a/docs/index.rst +++ b/docs/index.rst @@ -23,7 +23,7 @@ as a router and firewall platform for cloud deployments. routing.rst firewall.rst nat.rst - vpn.rst + vpn/index.rst qos.rst services/index.rst system/index.rst diff --git a/docs/vpn.rst b/docs/vpn.rst deleted file mode 100644 index 13eae32c..00000000 --- a/docs/vpn.rst +++ /dev/null @@ -1,929 +0,0 @@ -.. _vpn: - -VPN -=== - -OpenVPN -------- - -Traditionally hardware routers implement IPsec exclusively due to relative -ease of implementing it in hardware and insufficient CPU power for doing -encryption in software. Since VyOS is a software router, this is less of a -concern. OpenVPN has been widely used on UNIX platform for a long time and is -a popular option for remote access VPN, though it's also capable of -site-to-site connections. - -The advantages of OpenVPN are: -* It uses a single TCP or UDP connection and does not rely on packet source -addresses, so it will work even through a double NAT: perfect for public -hotspots and such - -* It's easy to setup and offers very flexible split tunneling - -* There's a variety of client GUI frontends for any platform - -The disadvantages are: -* It's slower than IPsec due to higher protocol overhead and the fact it runs -in user mode while IPsec, on Linux, is in kernel mode - -* None of the operating systems have client software installed by default - -In the VyOS CLI, a key point often overlooked is that rather than being -configured using the `set vpn` stanza, OpenVPN is configured as a network -interface using `set interfaces openvpn`. - -OpenVPN Site-To-Site -^^^^^^^^^^^^^^^^^^^^ - -While many are aware of OpenVPN as a Client VPN solution, it is often -overlooked as a site-to-site VPN solution due to lack of support for this mode -in many router platforms. - -Site-to-site mode supports x.509 but doesn't require it and can also work with -static keys, which is simpler in many cases. In this example, we'll configure -a simple site-to-site OpenVPN tunnel using a 2048-bit pre-shared key. - -First, one one of the systems generate the key using the operational command -`generate openvpn key <filename>`. This will generate a key with the name -provided in the `/config/auth/` directory. Once generated, you will need to -copy this key to the remote router. - -In our example, we used the filename `openvpn-1.key` which we will reference -in our configuration. - -* The public IP address of the local side of the VPN will be 198.51.100.10 -* The remote will be 203.0.113.11 -* The tunnel will use 10.255.1.1 for the local IP and 10.255.1.2 for the remote. -* OpenVPN allows for either TCP or UDP. UDP will provide the lowest latency, - while TCP will work better for lossy connections; generally UDP is preferred - when possible. -* The official port for OpenVPN is 1194, which we reserve for client VPN; we - will use 1195 for site-to-site VPN. -* The `persistent-tunnel` directive will allow us to configure tunnel-related - attributes, such as firewall policy as we would on any normal network - interface. -* If known, the IP of the remote router can be configured using the - `remote-host` directive; if unknown, it can be omitted. We will assume a - dynamic IP for our remote router. - -Local Configuration: - -.. code-block:: sh - - set interfaces openvpn vtun1 mode site-to-site - set interfaces openvpn vtun1 protocol udp - set interfaces openvpn vtun1 persistent-tunnel - set interfaces openvpn vtun1 local-host '198.51.100.10' - set interfaces openvpn vtun1 local-port '1195' - set interfaces openvpn vtun1 remote-port '1195' - set interfaces openvpn vtun1 shared-secret-key-file '/config/auth/openvpn-1.key' - set interfaces openvpn vtun1 local-address '10.255.1.1' - set interfaces openvpn vtun1 remote-address '10.255.1.2' - -Remote Configuration: - -.. code-block:: sh - - set interfaces openvpn vtun1 mode site-to-site - set interfaces openvpn vtun1 protocol udp - set interfaces openvpn vtun1 persistent-tunnel - set interfaces openvpn vtun1 remote-host '198.51.100.10' - set interfaces openvpn vtun1 local-port '1195' - set interfaces openvpn vtun1 remote-port '1195' - set interfaces openvpn vtun1 shared-secret-key-file '/config/auth/openvpn-1.key' - set interfaces openvpn vtun1 local-address '10.255.1.2' - set interfaces openvpn vtun1 remote-address '10.255.1.1' - -The configurations above will default to using 128-bit Blowfish in CBC mode -for encryption and SHA-1 for HMAC authentication. These are both considered -weak, but a number of other encryption and hashing algorithms are available: - -For Encryption: - -.. code-block:: sh - - vyos@vyos# set interfaces openvpn vtun1 encryption - Possible completions: - des DES algorithm - 3des DES algorithm with triple encryption - bf128 Blowfish algorithm with 128-bit key - bf256 Blowfish algorithm with 256-bit key - aes128 AES algorithm with 128-bit key - aes192 AES algorithm with 192-bit key - aes256 AES algorithm with 256-bit key - -For Hashing: - -.. code-block:: sh - - vyos@vyos# set interfaces openvpn vtun1 hash - Possible completions: - md5 MD5 algorithm - sha1 SHA-1 algorithm - sha256 SHA-256 algorithm - sha512 SHA-512 algorithm - -If you change the default encryption and hashing algorithms, be sure that the -local and remote ends have matching configurations, otherwise the tunnel will -not come up. - -Static routes can be configured referencing the tunnel interface; for example, -the local router will use a network of 10.0.0.0/16, while the remote has a -network of 10.1.0.0/16: - -Local Configuration: - -.. code-block:: sh - - set protocols static interface-route 10.1.0.0/16 next-hop-interface vtun1 - -Remote Configuration: - -.. code-block:: sh - - set protocols static interface-route 10.0.0.0/16 next-hop-interface vtun1 - -Firewall policy can also be applied to the tunnel interface for `local`, `in`, -and `out` directions and function identically to ethernet interfaces. - -If making use of multiple tunnels, OpenVPN must have a way to distinguish -between different tunnels aside from the pre-shared-key. This is either by -referencing IP address or port number. One option is to dedicate a public IP -to each tunnel. Another option is to dedicate a port number to each tunnel -(e.g. 1195,1196,1197...). - -OpenVPN status can be verified using the `show openvpn` operational commands. -See the built-in help for a complete list of options. - -OpenVPN Server -^^^^^^^^^^^^^^ - -Multi-client server is the most popular OpenVPN mode on routers. It always uses -x.509 authentication and therefore requires a PKI setup. This guide assumes you -have already setup a PKI and have a CA certificate, a server certificate and -key, a certificate revokation list, a Diffie-Hellman key exchange parameters -file. You do not need client certificates and keys for the server setup. - -In this example we will use the most complicated case: a setup where each -client is a router that has its own subnet (think HQ and branch offices), since -simpler setups are subsets of it. - -Suppose you want to use 10.23.1.0/24 network for client tunnel endpoints and -all client subnets belong to 10.23.0.0/20. All clients need access to the -192.168.0.0/16 network. - -First we need to specify the basic settings. 1194/UDP is the default. The -`persistent-tunnel` option is recommended, it prevents the TUN/TAP device from -closing on connection resets or daemon reloads. - -.. code-block:: sh - - set interfaces openvpn vtun10 mode server - set interfaces openvpn vtun10 local-port 1194 - set interfaces openvpn vtun10 persistent-tunnel - set interfaces openvpn vtun10 protocol udp - -Then we need to specify the location of the cryptographic materials. Suppose -you keep the files in `/config/auth/openvpn` - -.. code-block:: sh - - set interfaces openvpn vtun10 tls ca-cert-file /config/auth/openvpn/ca.crt - set interfaces openvpn vtun10 tls cert-file /config/auth/openvpn/server.crt - set interfaces openvpn vtun10 tls key-file /config/auth/openvpn/server.key - set interfaces openvpn vtun10 tls crl-file /config/auth/openvpn/crl.pem - set interfaces openvpn vtun10 tls dh-file /config/auth/openvpn/dh2048.pem - -Now we need to specify the server network settings. In all cases we need to -specify the subnet for client tunnel endpoints. Since we want clients to access -a specific network behind out router, we will use a push-route option for -installing that route on clients. - -.. code-block:: sh - - set interfaces openvpn vtun10 server push-route 192.168.0.0/16 - set interfaces openvpn vtun10 server subnet 10.23.1.0/24 - -Since it's a HQ and branch offices setup, we will want all clients to have -fixed addresses and we will route traffic to specific subnets through them. We -need configuration for each client to achieve this. - -.. note:: Clients are identified by the CN field of their x.509 certificates, - in this example the CN is ``client0``: - -.. code-block:: sh - - set interfaces openvpn vtun10 server client client0 ip 10.23.1.10 - set interfaces openvpn vtun10 server client client0 subnet 10.23.2.0/25 - -OpenVPN **will not** automatically create routes in the kernel for client -subnets when they connect and will only use client-subnet association -internally, so we need to create a route to the 10.23.0.0/20 network ourselves: - -.. code-block:: sh - - set protocols static interface-route 10.23.0.0/20 next-hop-interface vtun10 - -L2TP over IPsec ---------------- - -Example for configuring a simple L2TP over IPsec VPN for remote access (works -with native Windows and Mac VPN clients): - -.. code-block:: sh - - set vpn ipsec ipsec-interfaces interface eth0 - set vpn ipsec nat-traversal enable - set vpn ipsec nat-networks allowed-network 0.0.0.0/0 - - set vpn l2tp remote-access outside-address 203.0.113.2 - set vpn l2tp remote-access client-ip-pool start 192.168.255.1 - set vpn l2tp remote-access client-ip-pool stop 192.168.255.254 - set vpn l2tp remote-access ipsec-settings authentication mode pre-shared-secret - set vpn l2tp remote-access ipsec-settings authentication pre-shared-secret <secret> - set vpn l2tp remote-access authentication mode local - set vpn l2tp remote-access authentication local-users username <username> password <password> - -In the example above an external IP of 203.0.113.2 is assumed. - -If a local firewall policy is in place on your external interface you will need -to open: - -* UDP port 500 (IKE) -* IP protocol number 50 (ESP) -* UDP port 1701 for IPsec - -In addition when NAT is detected by the VPN client ESP is encapsulated in UDP -for NAT-traversal: - -* UDP port 4500 (NAT-T) - -Example: - -.. code-block:: sh - - set firewall name OUTSIDE-LOCAL rule 40 action 'accept' - set firewall name OUTSIDE-LOCAL rule 40 destination port '50' - set firewall name OUTSIDE-LOCAL rule 40 protocol 'esp' - set firewall name OUTSIDE-LOCAL rule 41 action 'accept' - set firewall name OUTSIDE-LOCAL rule 41 destination port '500' - set firewall name OUTSIDE-LOCAL rule 41 protocol 'udp' - set firewall name OUTSIDE-LOCAL rule 42 action 'accept' - set firewall name OUTSIDE-LOCAL rule 42 destination port '4500' - set firewall name OUTSIDE-LOCAL rule 42 protocol 'udp' - set firewall name OUTSIDE-LOCAL rule 43 action 'accept' - set firewall name OUTSIDE-LOCAL rule 43 destination port '1701' - set firewall name OUTSIDE-LOCAL rule 43 ipsec 'match-ipsec' - set firewall name OUTSIDE-LOCAL rule 43 protocol 'udp' - -Also note that if you wish to allow the VPN to be used for external access you -will need to add the appropriate source NAT rules to your configuration. - -.. code-block:: sh - - set nat source rule 110 outbound-interface 'eth0' - set nat source rule 110 source address '192.168.255.0/24' - set nat source rule 110 translation address masquerade - -To be able to resolve when connected to the VPN, the following DNS rules are -needed as well. - -.. code-block:: sh - - set vpn l2tp remote-access dns-servers server-1 '8.8.8.8' - set vpn l2tp remote-access dns-servers server-2 '8.8.4.4' - -.. note:: Those are the `Google public DNS`_ servers. You can also use the - public available servers from Quad9_ (9.9.9.9) or Cloudflare_ (1.1.1.1). - -Established sessions can be viewed using the **show vpn remote-access** -operational command. - -.. code-block:: sh - - vyos@vyos:~$ show vpn remote-access - Active remote access VPN sessions: - User Proto Iface Tunnel IP TX byte RX byte Time - ---- ----- ----- --------- ------- ------- ---- - vyos L2TP l2tp0 192.168.255.1 3.2K 8.0K 00h06m13s - -RADIUS authentication -^^^^^^^^^^^^^^^^^^^^^ - -The above configuration made use of local accounts on the VyOS router for -authenticating L2TP/IPSec clients. In bigger environments usually something -like RADIUS_ (FreeRADIUS_ or Microsoft `Network Policy Server`_, NPS) is used. - -VyOS supports either `local` or `radius` user authentication: - -.. code-block:: sh - - set vpn l2tp remote-access authentication mode <local|radius> - -In addition one or more RADIUS_ servers can be configured to server for user -authentication. This is done using the `radius server` and `radius server key` -nodes: - -.. code-block:: sh - - set vpn l2tp remote-access authentication radius server 1.1.1.1 key 'foo' - set vpn l2tp remote-access authentication radius server 2.2.2.2 key 'foo' - -.. note:: Some RADIUS_ severs make use of an access control list who is allowed - to query the server. Please configure your VyOS router in the allowed client - list. - -RADIUS source address -********************* - -If you are using e.g. OSPF as IGP always the nearest interface facing the RADIUS -server is used. With VyOS 1.2 you can bind all outgoing RADIUS requests to a -single source IP e.g. the loopback interface. - -.. code-block:: sh - - set vpn l2tp remote-access authentication radius source-address 3.3.3.3 - -Above command will use `3.3.3.3` as source IPv4 address for all RADIUS queries -on this NAS. - -Site-to-Site IPsec ------------------- - -Example: -* eth1 is WAN interface -* left subnet: 192.168.0.0/24 #s ite1, server side (i.e. locality, actually -there is no client or server roles) -* left local_ip: 1.1.1.1 # server side WAN IP -* right subnet: 10.0.0.0/24 # site2,remote office side -* right local_ip: 2.2.2.2 # remote office side WAN IP - -.. code-block:: sh - - # server config - set vpn ipsec esp-group office-srv-esp compression 'disable' - set vpn ipsec esp-group office-srv-esp lifetime '1800' - set vpn ipsec esp-group office-srv-esp mode 'tunnel' - set vpn ipsec esp-group office-srv-esp pfs 'enable' - set vpn ipsec esp-group office-srv-esp proposal 1 encryption 'aes256' - set vpn ipsec esp-group office-srv-esp proposal 1 hash 'sha1' - set vpn ipsec ike-group office-srv-ike ikev2-reauth 'no' - set vpn ipsec ike-group office-srv-ike key-exchange 'ikev1' - set vpn ipsec ike-group office-srv-ike lifetime '3600' - set vpn ipsec ike-group office-srv-ike proposal 1 encryption 'aes256' - set vpn ipsec ike-group office-srv-ike proposal 1 hash 'sha1' - set vpn ipsec ipsec-interfaces interface 'eth1' - set vpn ipsec site-to-site peer 2.2.2.2 authentication mode 'pre-shared-secret' - set vpn ipsec site-to-site peer 2.2.2.2 authentication pre-shared-secret 'SomePreSharedKey' - set vpn ipsec site-to-site peer 2.2.2.2 ike-group 'office-srv-ike' - set vpn ipsec site-to-site peer 2.2.2.2 local-address '1.1.1.1' - set vpn ipsec site-to-site peer 2.2.2.2 tunnel 0 allow-nat-networks 'disable' - set vpn ipsec site-to-site peer 2.2.2.2 tunnel 0 allow-public-networks 'disable' - set vpn ipsec site-to-site peer 2.2.2.2 tunnel 0 esp-group 'office-srv-esp' - set vpn ipsec site-to-site peer 2.2.2.2 tunnel 0 local prefix '192.168.0.0/24' - set vpn ipsec site-to-site peer 2.2.2.2 tunnel 0 remote prefix '10.0.0.0/21' - - # remote office config - set vpn ipsec esp-group office-srv-esp compression 'disable' - set vpn ipsec esp-group office-srv-esp lifetime '1800' - set vpn ipsec esp-group office-srv-esp mode 'tunnel' - set vpn ipsec esp-group office-srv-esp pfs 'enable' - set vpn ipsec esp-group office-srv-esp proposal 1 encryption 'aes256' - set vpn ipsec esp-group office-srv-esp proposal 1 hash 'sha1' - set vpn ipsec ike-group office-srv-ike ikev2-reauth 'no' - set vpn ipsec ike-group office-srv-ike key-exchange 'ikev1' - set vpn ipsec ike-group office-srv-ike lifetime '3600' - set vpn ipsec ike-group office-srv-ike proposal 1 encryption 'aes256' - set vpn ipsec ike-group office-srv-ike proposal 1 hash 'sha1' - set vpn ipsec ipsec-interfaces interface 'eth1' - set vpn ipsec site-to-site peer 1.1.1.1 authentication mode 'pre-shared-secret' - set vpn ipsec site-to-site peer 1.1.1.1 authentication pre-shared-secret 'SomePreSharedKey' - set vpn ipsec site-to-site peer 1.1.1.1 ike-group 'office-srv-ike' - set vpn ipsec site-to-site peer 1.1.1.1 local-address '2.2.2.2' - set vpn ipsec site-to-site peer 1.1.1.1 tunnel 0 allow-nat-networks 'disable' - set vpn ipsec site-to-site peer 1.1.1.1 tunnel 0 allow-public-networks 'disable' - set vpn ipsec site-to-site peer 1.1.1.1 tunnel 0 esp-group 'office-srv-esp' - set vpn ipsec site-to-site peer 1.1.1.1 tunnel 0 local prefix '10.0.0.0/21' - set vpn ipsec site-to-site peer 1.1.1.1 tunnel 0 remote prefix '192.168.0.0/24' - -Show status of new setup: - -.. code-block:: sh - - vyos@srv-gw0:~$ show vpn ike sa - Peer ID / IP Local ID / IP - ------------ ------------- - 2.2.2.2 1.1.1.1 - State Encrypt Hash D-H Grp NAT-T A-Time L-Time - ----- ------- ---- ------- ----- ------ ------ - up aes256 sha1 5 no 734 3600 - - vyos@srv-gw0:~$ show vpn ipsec sa - Peer ID / IP Local ID / IP - ------------ ------------- - 2.2.2.2 1.1.1.1 - Tunnel State Bytes Out/In Encrypt Hash NAT-T A-Time L-Time Proto - ------ ----- ------------- ------- ---- ----- ------ ------ ----- - 0 up 7.5M/230.6K aes256 sha1 no 567 1800 all - -If there is SNAT rules on eth1, need to add exclude rule - -.. code-block:: sh - - # server side - set nat source rule 10 destination address '10.0.0.0/24' - set nat source rule 10 'exclude' - set nat source rule 10 outbound-interface 'eth1' - set nat source rule 10 source address '192.168.0.0/24' - - # remote office side - set nat source rule 10 destination address '192.168.0.0/24' - set nat source rule 10 'exclude' - set nat source rule 10 outbound-interface 'eth1' - set nat source rule 10 source address '10.0.0.0/24' - -To allow traffic to pass through to clients, you need to add the following -rules. (if you used the default configuration at the top of this page) - -.. code-block:: sh - - # server side - set firewall name OUTSIDE-LOCAL rule 32 action 'accept' - set firewall name OUTSIDE-LOCAL rule 32 source address '10.0.0.0/24' - - # remote office side - set firewall name OUTSIDE-LOCAL rule 32 action 'accept' - set firewall name OUTSIDE-LOCAL rule 32 source address '192.168.0.0/24' - -.. _vpn-dmvpn: - -DMVPN ------ - -**D** ynamic **M** ultipoint **V** irtual **P** rivate **N** etworking - -DMVPN is a dynamic VPN technology originally developed by Cisco. While their -implementation was somewhat proprietary, the underlying technologies are -actually standards based. The three technologies are: - -* **NHRP** - NBMA Next Hop Resolution Protocol RFC2332_ -* **mGRE** - Multipoint Generic Routing Encapsulation / mGRE RFC1702_ -* **IPSec** - IP Security (too many RFCs to list, but start with RFC4301_) - -NHRP provides the dynamic tunnel endpoint discovery mechanism (endpoint -registration, and endpoint discovery/lookup), mGRE provides the tunnel -encapsulation itself, and the IPSec protocols handle the key exchange, and -crypto mechanism. - -In short, DMVPN provides the capability for creating a dynamic-mesh VPN -network without having to pre-configure (static) all possible tunnel end-point -peers. - -.. note:: DMVPN only automates the tunnel endpoint discovery and setup. A - complete solution also incorporates the use of a routing protocol. BGP is - particularly well suited for use with DMVPN. - -Baseline Configuration: - -**STEPS:** - -#. Create tunnel config (`interfaces tunnel`) -#. Create nhrp (`protocols nhrp`) -#. Create ipsec vpn (optional, but recommended for security) (`vpn ipsec`) - -The tunnel will be set to mGRE if for encapsulation `gre` is set, and no -`remote-ip` is set. If the public ip is provided by DHCP the tunnel `local-ip` -can be set to "0.0.0.0" - -.. figure:: _static/images/vpn_dmvpn_topology01.png - :scale: 40 % - :alt: Baseline DMVPN topology - - Baseline DMVPN topology - -HUB Configuration -^^^^^^^^^^^^^^^^^ - -.. code-block:: sh - - interfaces - tunnel <tunN> { - address <ipv4> - encapsulation gre - local-ip <public ip> - multicast enable - description <txt> - parameters { - ip { - <usual IP options> - } - } - } - } - protocols { - nhrp { - tunnel <tunN> { - cisco-authentication <key phrase> - holding-time <seconds> - multicast dynamic - redirect - } - } - } - vpn { - ipsec { - esp-group <text> { - lifetime <30-86400> - mode tunnel - pfs enable - proposal <1-65535> { - encryption aes256 - hash sha1 - } - proposal <1-65535> { - encryption 3des - hash md5 - } - } - ike-group <text> { - key-exchange ikev1 - lifetime <30-86400> - proposal <1-65535> { - encryption aes256 - hash sha1 - } - proposal <1-65535> { - encryption aes128 - hash sha1 - } - } - ipsec-interfaces { - interface <ethN> - } - profile <text> { - authentication { - mode pre-shared-secret - pre-shared-secret <key phrase> - } - bind { - tunnel <tunN> - } - esp-group <text> - ike-group <text> - } - } - } - -HUB Example Configuration: - -.. code-block:: sh - - set interfaces ethernet eth0 address '1.1.1.1/30' - set interfaces ethernet eth1 address '192.168.1.1/24' - set system host-name 'HUB' - - set interfaces tunnel tun0 address 10.0.0.1/24 - set interfaces tunnel tun0 encapsulation gre - set interfaces tunnel tun0 local-ip 1.1.1.1 - set interfaces tunnel tun0 multicast enable - set interfaces tunnel tun0 parameters ip key 1 - - set protocols nhrp tunnel tun0 cisco-authentication SECRET - set protocols nhrp tunnel tun0 holding-time 300 - set protocols nhrp tunnel tun0 multicast dynamic - set protocols nhrp tunnel tun0 redirect - - set vpn ipsec ipsec-interfaces interface eth0 - set vpn ipsec ike-group IKE-HUB proposal 1 - set vpn ipsec ike-group IKE-HUB proposal 1 encryption aes256 - set vpn ipsec ike-group IKE-HUB proposal 1 hash sha1 - set vpn ipsec ike-group IKE-HUB proposal 2 encryption aes128 - set vpn ipsec ike-group IKE-HUB proposal 2 hash sha1 - set vpn ipsec ike-group IKE-HUB lifetime 3600 - set vpn ipsec esp-group ESP-HUB proposal 1 encryption aes256 - set vpn ipsec esp-group ESP-HUB proposal 1 hash sha1 - set vpn ipsec esp-group ESP-HUB proposal 2 encryption 3des - set vpn ipsec esp-group ESP-HUB proposal 2 hash md5 - set vpn ipsec esp-group ESP-HUB lifetime 1800 - set vpn ipsec esp-group ESP-HUB pfs dh-group2 - - set vpn ipsec profile NHRPVPN - set vpn ipsec profile NHRPVPN authentication mode pre-shared-secret - set vpn ipsec profile NHRPVPN authentication pre-shared-secret SECRET - set vpn ipsec profile NHRPVPN bind tunnel tun0 - set vpn ipsec profile NHRPVPN esp-group ESP-HUB - set vpn ipsec profile NHRPVPN ike-group IKE-HUB - - set protocols static route 0.0.0.0/0 next-hop 1.1.1.2 - set protocols static route 192.168.2.0/24 next-hop 10.0.0.2 - set protocols static route 192.168.3.0/24 next-hop 10.0.0.3 - -SPOKE Configuration -^^^^^^^^^^^^^^^^^^^ - -SPOKE1 Configuration: - -.. code-block:: sh - - interfaces - tunnel <tunN> { - address <ipv4> - encapsulation gre - local-ip <public ip> - multicast enable - description <txt> - parameters { - ip { - <usual IP options> - } - } - } - } - protocols { - nhrp { - tunnel <tunN> { - cisco-authentication <key phrase> - map <ipv4/net> { - nbma-address <ipv4> - register - } - holding-time <seconds> - multicast nhs - redirect - shortcut - } - } - } - vpn { - ipsec { - esp-group <text> { - lifetime <30-86400> - mode tunnel - pfs enable - proposal <1-65535> { - encryption aes256 - hash sha1 - } - proposal <1-65535> { - encryption 3des - hash md5 - } - } - ike-group <text> { - key-exchange ikev1 - lifetime <30-86400> - proposal <1-65535> { - encryption aes256 - hash sha1 - } - proposal <1-65535> { - encryption aes128 - hash sha1 - } - } - ipsec-interfaces { - interface <ethN> - } - profile <text> { - authentication { - mode pre-shared-secret - pre-shared-secret <key phrase> - } - bind { - tunnel <tunN> - } - esp-group <text> - ike-group <text> - } - } - } - -SPOKE1 Example Configuration - -.. code-block:: sh - - set interfaces ethernet eth0 address 'dhcp' - set interfaces ethernet eth1 address '192.168.2.1/24' - set system host-name 'SPOKE1' - - set interfaces tunnel tun0 address 10.0.0.2/24 - set interfaces tunnel tun0 encapsulation gre - set interfaces tunnel tun0 local-ip 0.0.0.0 - set interfaces tunnel tun0 multicast enable - set interfaces tunnel tun0 parameters ip key 1 - - set protocols nhrp tunnel tun0 cisco-authentication 'SECRET' - set protocols nhrp tunnel tun0 map 10.0.0.1/24 nbma-address 1.1.1.1 - set protocols nhrp tunnel tun0 map 10.0.0.1/24 'register' - set protocols nhrp tunnel tun0 multicast 'nhs' - set protocols nhrp tunnel tun0 'redirect' - set protocols nhrp tunnel tun0 'shortcut' - - set vpn ipsec ipsec-interfaces interface eth0 - set vpn ipsec ike-group IKE-SPOKE proposal 1 - set vpn ipsec ike-group IKE-SPOKE proposal 1 encryption aes256 - set vpn ipsec ike-group IKE-SPOKE proposal 1 hash sha1 - set vpn ipsec ike-group IKE-SPOKE proposal 2 encryption aes128 - set vpn ipsec ike-group IKE-SPOKE proposal 2 hash sha1 - set vpn ipsec ike-group IKE-SPOKE lifetime 3600 - set vpn ipsec esp-group ESP-SPOKE proposal 1 encryption aes256 - set vpn ipsec esp-group ESP-SPOKE proposal 1 hash sha1 - set vpn ipsec esp-group ESP-SPOKE proposal 2 encryption 3des - set vpn ipsec esp-group ESP-SPOKE proposal 2 hash md5 - set vpn ipsec esp-group ESP-SPOKE lifetime 1800 - set vpn ipsec esp-group ESP-SPOKE pfs dh-group2 - - set vpn ipsec profile NHRPVPN - set vpn ipsec profile NHRPVPN authentication mode pre-shared-secret - set vpn ipsec profile NHRPVPN authentication pre-shared-secret SECRET - set vpn ipsec profile NHRPVPN bind tunnel tun0 - set vpn ipsec profile NHRPVPN esp-group ESP-SPOKE - set vpn ipsec profile NHRPVPN ike-group IKE-SPOKE - - set protocols static route 192.168.1.0/24 next-hop 10.0.0.1 - set protocols static route 192.168.3.0/24 next-hop 10.0.0.3 - - -SPOKE2 Configuration - -.. code-block:: sh - - interfaces - tunnel <tunN> { - address <ipv4> - encapsulation gre - local-ip <public ip> - multicast enable - description <txt> - parameters { - ip { - <usual IP options> - } - } - } - } - protocols { - nhrp { - tunnel <tunN> { - cisco-authentication <key phrase> - map <ipv4/net> { - nbma-address <ipv4> - register - } - holding-time <seconds> - multicast nhs - redirect - shortcut - } - } - } - vpn { - ipsec { - esp-group <text> { - lifetime <30-86400> - mode tunnel - pfs enable - proposal <1-65535> { - encryption aes256 - hash sha1 - } - proposal <1-65535> { - encryption 3des - hash md5 - } - } - ike-group <text> { - key-exchange ikev1 - lifetime <30-86400> - proposal <1-65535> { - encryption aes256 - hash sha1 - } - proposal <1-65535> { - encryption aes128 - hash sha1 - } - } - ipsec-interfaces { - interface <ethN> - } - profile <text> { - authentication { - mode pre-shared-secret - pre-shared-secret <key phrase> - } - bind { - tunnel <tunN> - } - esp-group <text> - ike-group <text> - } - } - } - -SPOKE2 Example Configuration - -.. code-block:: sh - - set interfaces ethernet eth0 address 'dhcp' - set interfaces ethernet eth1 address '192.168.3.1/24' - set system host-name 'SPOKE2' - - set interfaces tunnel tun0 address 10.0.0.3/24 - set interfaces tunnel tun0 encapsulation gre - set interfaces tunnel tun0 local-ip 0.0.0.0 - set interfaces tunnel tun0 multicast enable - set interfaces tunnel tun0 parameters ip key 1 - - set protocols nhrp tunnel tun0 cisco-authentication SECRET - set protocols nhrp tunnel tun0 map 10.0.0.1/24 nbma-address 1.1.1.1 - set protocols nhrp tunnel tun0 map 10.0.0.1/24 register - set protocols nhrp tunnel tun0 multicast nhs - set protocols nhrp tunnel tun0 redirect - set protocols nhrp tunnel tun0 shortcut - - set vpn ipsec ipsec-interfaces interface eth0 - set vpn ipsec ike-group IKE-SPOKE proposal 1 - set vpn ipsec ike-group IKE-SPOKE proposal 1 encryption aes256 - set vpn ipsec ike-group IKE-SPOKE proposal 1 hash sha1 - set vpn ipsec ike-group IKE-SPOKE proposal 2 encryption aes128 - set vpn ipsec ike-group IKE-SPOKE proposal 2 hash sha1 - set vpn ipsec ike-group IKE-SPOKE lifetime 3600 - set vpn ipsec esp-group ESP-SPOKE proposal 1 encryption aes256 - set vpn ipsec esp-group ESP-SPOKE proposal 1 hash sha1 - set vpn ipsec esp-group ESP-SPOKE proposal 2 encryption 3des - set vpn ipsec esp-group ESP-SPOKE proposal 2 hash md5 - set vpn ipsec esp-group ESP-SPOKE lifetime 1800 - set vpn ipsec esp-group ESP-SPOKE pfs dh-group2 - - set vpn ipsec profile NHRPVPN - set vpn ipsec profile NHRPVPN authentication mode pre-shared-secret - set vpn ipsec profile NHRPVPN authentication pre-shared-secret SECRET - set vpn ipsec profile NHRPVPN bind tunnel tun0 - set vpn ipsec profile NHRPVPN esp-group ESP-SPOKE - set vpn ipsec profile NHRPVPN ike-group IKE-SPOKE - - set protocols static route 192.168.1.0/24 next-hop 10.0.0.1 - set protocols static route 192.168.2.0/24 next-hop 10.0.0.2 - - -PPTP-Server ------------ - -The Point-to-Point Tunneling Protocol (PPTP_) has been implemented in VyOS only for backwards compatibility. -PPTP has many well known secrurity issues and you should use one of the many other new VPN implementations. - -As per default and if not otherwise defined, mschap-v2 is being used for authentication and mppe 128-bit (stateless) for encryption. -If no gateway-address is set within the configuration, the lowest IP out of the /24 client-ip-pool is being used. For instance, in the example below it would be 192.168.0.1. - -server example -^^^^^^^^^^^^^^ - -.. code-block:: sh - - set vpn pptp remote-access authentication local-users username test password 'test' - set vpn pptp remote-access authentication mode 'local' - set vpn pptp remote-access client-ip-pool start '192.168.0.10' - set vpn pptp remote-access client-ip-pool stop '192.168.0.15' - set vpn pptp remote-access gateway-address '10.100.100.1' - set vpn pptp remote-access outside-address '10.1.1.120' - - -client example (debian 9) -^^^^^^^^^^^^^^^^^^^^^^^^^ - -Install the client software via apt and execute pptpsetup to generate the configuration. - - -.. code-block:: sh - - apt-get install pptp-linux - pptpsetup --create TESTTUNNEL --server 10.1.1.120 --username test --password test --encrypt - pon TESTTUNNEL - -The command pon TESTUNNEL establishes the PPTP tunnel to the remote system. - - -All tunnel sessions can be checked via: - -.. code-block:: sh - - run sh pptp-server sessions - ifname | username | calling-sid | ip | type | comp | state | uptime - --------+----------+-------------+--------------+------+------+--------+---------- - ppp0 | test | 10.1.1.99 | 192.168.0.10 | pptp | mppe | active | 00:00:58 - - -.. _`Google Public DNS`: https://developers.google.com/speed/public-dns -.. _Quad9: https://quad9.net -.. _CloudFlare: https://blog.cloudflare.com/announcing-1111 -.. _RADIUS: https://en.wikipedia.org/wiki/RADIUS -.. _FreeRADIUS: https://freeradius.org -.. _`Network Policy Server`: https://en.wikipedia.org/wiki/Network_Policy_Server -.. _RFC2332: https://tools.ietf.org/html/rfc2332 -.. _RFC1702: https://tools.ietf.org/html/rfc1702 -.. _RFC4301: https://tools.ietf.org/html/rfc4301 -.. _PPTP: https://en.wikipedia.org/wiki/Point-to-Point_Tunneling_Protocol - - -.. include:: interfaces/wireguard.rst diff --git a/docs/vpn/dmvpn.rst b/docs/vpn/dmvpn.rst new file mode 100644 index 00000000..62ff9618 --- /dev/null +++ b/docs/vpn/dmvpn.rst @@ -0,0 +1,410 @@ +.. _vpn-dmvpn: + +DMVPN +----- + +**D** ynamic **M** ultipoint **V** irtual **P** rivate **N** etworking + +DMVPN is a dynamic VPN technology originally developed by Cisco. While their +implementation was somewhat proprietary, the underlying technologies are +actually standards based. The three technologies are: + +* **NHRP** - NBMA Next Hop Resolution Protocol RFC2332_ +* **mGRE** - Multipoint Generic Routing Encapsulation / mGRE RFC1702_ +* **IPSec** - IP Security (too many RFCs to list, but start with RFC4301_) + +NHRP provides the dynamic tunnel endpoint discovery mechanism (endpoint +registration, and endpoint discovery/lookup), mGRE provides the tunnel +encapsulation itself, and the IPSec protocols handle the key exchange, and +crypto mechanism. + +In short, DMVPN provides the capability for creating a dynamic-mesh VPN +network without having to pre-configure (static) all possible tunnel end-point +peers. + +.. note:: DMVPN only automates the tunnel endpoint discovery and setup. A + complete solution also incorporates the use of a routing protocol. BGP is + particularly well suited for use with DMVPN. + +Baseline Configuration: + +**STEPS:** + +#. Create tunnel config (`interfaces tunnel`) +#. Create nhrp (`protocols nhrp`) +#. Create ipsec vpn (optional, but recommended for security) (`vpn ipsec`) + +The tunnel will be set to mGRE if for encapsulation `gre` is set, and no +`remote-ip` is set. If the public ip is provided by DHCP the tunnel `local-ip` +can be set to "0.0.0.0" + +.. figure:: ../_static/images/vpn_dmvpn_topology01.png + :scale: 40 % + :alt: Baseline DMVPN topology + + Baseline DMVPN topology + +HUB Configuration +^^^^^^^^^^^^^^^^^ + +.. code-block:: sh + + interfaces + tunnel <tunN> { + address <ipv4> + encapsulation gre + local-ip <public ip> + multicast enable + description <txt> + parameters { + ip { + <usual IP options> + } + } + } + } + protocols { + nhrp { + tunnel <tunN> { + cisco-authentication <key phrase> + holding-time <seconds> + multicast dynamic + redirect + } + } + } + vpn { + ipsec { + esp-group <text> { + lifetime <30-86400> + mode tunnel + pfs enable + proposal <1-65535> { + encryption aes256 + hash sha1 + } + proposal <1-65535> { + encryption 3des + hash md5 + } + } + ike-group <text> { + key-exchange ikev1 + lifetime <30-86400> + proposal <1-65535> { + encryption aes256 + hash sha1 + } + proposal <1-65535> { + encryption aes128 + hash sha1 + } + } + ipsec-interfaces { + interface <ethN> + } + profile <text> { + authentication { + mode pre-shared-secret + pre-shared-secret <key phrase> + } + bind { + tunnel <tunN> + } + esp-group <text> + ike-group <text> + } + } + } + +HUB Example Configuration: + +.. code-block:: sh + + set interfaces ethernet eth0 address '1.1.1.1/30' + set interfaces ethernet eth1 address '192.168.1.1/24' + set system host-name 'HUB' + + set interfaces tunnel tun0 address 10.0.0.1/24 + set interfaces tunnel tun0 encapsulation gre + set interfaces tunnel tun0 local-ip 1.1.1.1 + set interfaces tunnel tun0 multicast enable + set interfaces tunnel tun0 parameters ip key 1 + + set protocols nhrp tunnel tun0 cisco-authentication SECRET + set protocols nhrp tunnel tun0 holding-time 300 + set protocols nhrp tunnel tun0 multicast dynamic + set protocols nhrp tunnel tun0 redirect + + set vpn ipsec ipsec-interfaces interface eth0 + set vpn ipsec ike-group IKE-HUB proposal 1 + set vpn ipsec ike-group IKE-HUB proposal 1 encryption aes256 + set vpn ipsec ike-group IKE-HUB proposal 1 hash sha1 + set vpn ipsec ike-group IKE-HUB proposal 2 encryption aes128 + set vpn ipsec ike-group IKE-HUB proposal 2 hash sha1 + set vpn ipsec ike-group IKE-HUB lifetime 3600 + set vpn ipsec esp-group ESP-HUB proposal 1 encryption aes256 + set vpn ipsec esp-group ESP-HUB proposal 1 hash sha1 + set vpn ipsec esp-group ESP-HUB proposal 2 encryption 3des + set vpn ipsec esp-group ESP-HUB proposal 2 hash md5 + set vpn ipsec esp-group ESP-HUB lifetime 1800 + set vpn ipsec esp-group ESP-HUB pfs dh-group2 + + set vpn ipsec profile NHRPVPN + set vpn ipsec profile NHRPVPN authentication mode pre-shared-secret + set vpn ipsec profile NHRPVPN authentication pre-shared-secret SECRET + set vpn ipsec profile NHRPVPN bind tunnel tun0 + set vpn ipsec profile NHRPVPN esp-group ESP-HUB + set vpn ipsec profile NHRPVPN ike-group IKE-HUB + + set protocols static route 0.0.0.0/0 next-hop 1.1.1.2 + set protocols static route 192.168.2.0/24 next-hop 10.0.0.2 + set protocols static route 192.168.3.0/24 next-hop 10.0.0.3 + +SPOKE Configuration +^^^^^^^^^^^^^^^^^^^ + +SPOKE1 Configuration: + +.. code-block:: sh + + interfaces + tunnel <tunN> { + address <ipv4> + encapsulation gre + local-ip <public ip> + multicast enable + description <txt> + parameters { + ip { + <usual IP options> + } + } + } + } + protocols { + nhrp { + tunnel <tunN> { + cisco-authentication <key phrase> + map <ipv4/net> { + nbma-address <ipv4> + register + } + holding-time <seconds> + multicast nhs + redirect + shortcut + } + } + } + vpn { + ipsec { + esp-group <text> { + lifetime <30-86400> + mode tunnel + pfs enable + proposal <1-65535> { + encryption aes256 + hash sha1 + } + proposal <1-65535> { + encryption 3des + hash md5 + } + } + ike-group <text> { + key-exchange ikev1 + lifetime <30-86400> + proposal <1-65535> { + encryption aes256 + hash sha1 + } + proposal <1-65535> { + encryption aes128 + hash sha1 + } + } + ipsec-interfaces { + interface <ethN> + } + profile <text> { + authentication { + mode pre-shared-secret + pre-shared-secret <key phrase> + } + bind { + tunnel <tunN> + } + esp-group <text> + ike-group <text> + } + } + } + +SPOKE1 Example Configuration + +.. code-block:: sh + + set interfaces ethernet eth0 address 'dhcp' + set interfaces ethernet eth1 address '192.168.2.1/24' + set system host-name 'SPOKE1' + + set interfaces tunnel tun0 address 10.0.0.2/24 + set interfaces tunnel tun0 encapsulation gre + set interfaces tunnel tun0 local-ip 0.0.0.0 + set interfaces tunnel tun0 multicast enable + set interfaces tunnel tun0 parameters ip key 1 + + set protocols nhrp tunnel tun0 cisco-authentication 'SECRET' + set protocols nhrp tunnel tun0 map 10.0.0.1/24 nbma-address 1.1.1.1 + set protocols nhrp tunnel tun0 map 10.0.0.1/24 'register' + set protocols nhrp tunnel tun0 multicast 'nhs' + set protocols nhrp tunnel tun0 'redirect' + set protocols nhrp tunnel tun0 'shortcut' + + set vpn ipsec ipsec-interfaces interface eth0 + set vpn ipsec ike-group IKE-SPOKE proposal 1 + set vpn ipsec ike-group IKE-SPOKE proposal 1 encryption aes256 + set vpn ipsec ike-group IKE-SPOKE proposal 1 hash sha1 + set vpn ipsec ike-group IKE-SPOKE proposal 2 encryption aes128 + set vpn ipsec ike-group IKE-SPOKE proposal 2 hash sha1 + set vpn ipsec ike-group IKE-SPOKE lifetime 3600 + set vpn ipsec esp-group ESP-SPOKE proposal 1 encryption aes256 + set vpn ipsec esp-group ESP-SPOKE proposal 1 hash sha1 + set vpn ipsec esp-group ESP-SPOKE proposal 2 encryption 3des + set vpn ipsec esp-group ESP-SPOKE proposal 2 hash md5 + set vpn ipsec esp-group ESP-SPOKE lifetime 1800 + set vpn ipsec esp-group ESP-SPOKE pfs dh-group2 + + set vpn ipsec profile NHRPVPN + set vpn ipsec profile NHRPVPN authentication mode pre-shared-secret + set vpn ipsec profile NHRPVPN authentication pre-shared-secret SECRET + set vpn ipsec profile NHRPVPN bind tunnel tun0 + set vpn ipsec profile NHRPVPN esp-group ESP-SPOKE + set vpn ipsec profile NHRPVPN ike-group IKE-SPOKE + + set protocols static route 192.168.1.0/24 next-hop 10.0.0.1 + set protocols static route 192.168.3.0/24 next-hop 10.0.0.3 + + +SPOKE2 Configuration + +.. code-block:: sh + + interfaces + tunnel <tunN> { + address <ipv4> + encapsulation gre + local-ip <public ip> + multicast enable + description <txt> + parameters { + ip { + <usual IP options> + } + } + } + } + protocols { + nhrp { + tunnel <tunN> { + cisco-authentication <key phrase> + map <ipv4/net> { + nbma-address <ipv4> + register + } + holding-time <seconds> + multicast nhs + redirect + shortcut + } + } + } + vpn { + ipsec { + esp-group <text> { + lifetime <30-86400> + mode tunnel + pfs enable + proposal <1-65535> { + encryption aes256 + hash sha1 + } + proposal <1-65535> { + encryption 3des + hash md5 + } + } + ike-group <text> { + key-exchange ikev1 + lifetime <30-86400> + proposal <1-65535> { + encryption aes256 + hash sha1 + } + proposal <1-65535> { + encryption aes128 + hash sha1 + } + } + ipsec-interfaces { + interface <ethN> + } + profile <text> { + authentication { + mode pre-shared-secret + pre-shared-secret <key phrase> + } + bind { + tunnel <tunN> + } + esp-group <text> + ike-group <text> + } + } + } + +SPOKE2 Example Configuration + +.. code-block:: sh + + set interfaces ethernet eth0 address 'dhcp' + set interfaces ethernet eth1 address '192.168.3.1/24' + set system host-name 'SPOKE2' + + set interfaces tunnel tun0 address 10.0.0.3/24 + set interfaces tunnel tun0 encapsulation gre + set interfaces tunnel tun0 local-ip 0.0.0.0 + set interfaces tunnel tun0 multicast enable + set interfaces tunnel tun0 parameters ip key 1 + + set protocols nhrp tunnel tun0 cisco-authentication SECRET + set protocols nhrp tunnel tun0 map 10.0.0.1/24 nbma-address 1.1.1.1 + set protocols nhrp tunnel tun0 map 10.0.0.1/24 register + set protocols nhrp tunnel tun0 multicast nhs + set protocols nhrp tunnel tun0 redirect + set protocols nhrp tunnel tun0 shortcut + + set vpn ipsec ipsec-interfaces interface eth0 + set vpn ipsec ike-group IKE-SPOKE proposal 1 + set vpn ipsec ike-group IKE-SPOKE proposal 1 encryption aes256 + set vpn ipsec ike-group IKE-SPOKE proposal 1 hash sha1 + set vpn ipsec ike-group IKE-SPOKE proposal 2 encryption aes128 + set vpn ipsec ike-group IKE-SPOKE proposal 2 hash sha1 + set vpn ipsec ike-group IKE-SPOKE lifetime 3600 + set vpn ipsec esp-group ESP-SPOKE proposal 1 encryption aes256 + set vpn ipsec esp-group ESP-SPOKE proposal 1 hash sha1 + set vpn ipsec esp-group ESP-SPOKE proposal 2 encryption 3des + set vpn ipsec esp-group ESP-SPOKE proposal 2 hash md5 + set vpn ipsec esp-group ESP-SPOKE lifetime 1800 + set vpn ipsec esp-group ESP-SPOKE pfs dh-group2 + + set vpn ipsec profile NHRPVPN + set vpn ipsec profile NHRPVPN authentication mode pre-shared-secret + set vpn ipsec profile NHRPVPN authentication pre-shared-secret SECRET + set vpn ipsec profile NHRPVPN bind tunnel tun0 + set vpn ipsec profile NHRPVPN esp-group ESP-SPOKE + set vpn ipsec profile NHRPVPN ike-group IKE-SPOKE + + set protocols static route 192.168.1.0/24 next-hop 10.0.0.1 + set protocols static route 192.168.2.0/24 next-hop 10.0.0.2 diff --git a/docs/vpn/index.rst b/docs/vpn/index.rst new file mode 100644 index 00000000..96a73454 --- /dev/null +++ b/docs/vpn/index.rst @@ -0,0 +1,17 @@ +.. _vpn: + +.. include:: references.rst + +VPN +=== + +This chapter descriptes the available VPN services provided by VyOS. + +.. toctree:: + :hidden: + + openvpn + l2tp_ipsec + site2site_ipsec + dmvpn + pptp diff --git a/docs/vpn/l2tp_ipsec.rst b/docs/vpn/l2tp_ipsec.rst new file mode 100644 index 00000000..5d730ec0 --- /dev/null +++ b/docs/vpn/l2tp_ipsec.rst @@ -0,0 +1,124 @@ +.. _l2tp_ipsec: + +L2TP over IPsec +--------------- + +Example for configuring a simple L2TP over IPsec VPN for remote access (works +with native Windows and Mac VPN clients): + +.. code-block:: sh + + set vpn ipsec ipsec-interfaces interface eth0 + set vpn ipsec nat-traversal enable + set vpn ipsec nat-networks allowed-network 0.0.0.0/0 + + set vpn l2tp remote-access outside-address 203.0.113.2 + set vpn l2tp remote-access client-ip-pool start 192.168.255.1 + set vpn l2tp remote-access client-ip-pool stop 192.168.255.254 + set vpn l2tp remote-access ipsec-settings authentication mode pre-shared-secret + set vpn l2tp remote-access ipsec-settings authentication pre-shared-secret <secret> + set vpn l2tp remote-access authentication mode local + set vpn l2tp remote-access authentication local-users username <username> password <password> + +In the example above an external IP of 203.0.113.2 is assumed. + +If a local firewall policy is in place on your external interface you will need +to open: + +* UDP port 500 (IKE) +* IP protocol number 50 (ESP) +* UDP port 1701 for IPsec + +In addition when NAT is detected by the VPN client ESP is encapsulated in UDP +for NAT-traversal: + +* UDP port 4500 (NAT-T) + +Example: + +.. code-block:: sh + + set firewall name OUTSIDE-LOCAL rule 40 action 'accept' + set firewall name OUTSIDE-LOCAL rule 40 destination port '50' + set firewall name OUTSIDE-LOCAL rule 40 protocol 'esp' + set firewall name OUTSIDE-LOCAL rule 41 action 'accept' + set firewall name OUTSIDE-LOCAL rule 41 destination port '500' + set firewall name OUTSIDE-LOCAL rule 41 protocol 'udp' + set firewall name OUTSIDE-LOCAL rule 42 action 'accept' + set firewall name OUTSIDE-LOCAL rule 42 destination port '4500' + set firewall name OUTSIDE-LOCAL rule 42 protocol 'udp' + set firewall name OUTSIDE-LOCAL rule 43 action 'accept' + set firewall name OUTSIDE-LOCAL rule 43 destination port '1701' + set firewall name OUTSIDE-LOCAL rule 43 ipsec 'match-ipsec' + set firewall name OUTSIDE-LOCAL rule 43 protocol 'udp' + +Also note that if you wish to allow the VPN to be used for external access you +will need to add the appropriate source NAT rules to your configuration. + +.. code-block:: sh + + set nat source rule 110 outbound-interface 'eth0' + set nat source rule 110 source address '192.168.255.0/24' + set nat source rule 110 translation address masquerade + +To be able to resolve when connected to the VPN, the following DNS rules are +needed as well. + +.. code-block:: sh + + set vpn l2tp remote-access dns-servers server-1 '8.8.8.8' + set vpn l2tp remote-access dns-servers server-2 '8.8.4.4' + +.. note:: Those are the `Google public DNS`_ servers. You can also use the + public available servers from Quad9_ (9.9.9.9) or Cloudflare_ (1.1.1.1). + +Established sessions can be viewed using the **show vpn remote-access** +operational command. + +.. code-block:: sh + + vyos@vyos:~$ show vpn remote-access + Active remote access VPN sessions: + User Proto Iface Tunnel IP TX byte RX byte Time + ---- ----- ----- --------- ------- ------- ---- + vyos L2TP l2tp0 192.168.255.1 3.2K 8.0K 00h06m13s + +RADIUS authentication +^^^^^^^^^^^^^^^^^^^^^ + +The above configuration made use of local accounts on the VyOS router for +authenticating L2TP/IPSec clients. In bigger environments usually something +like RADIUS_ (FreeRADIUS_ or Microsoft `Network Policy Server`_, NPS) is used. + +VyOS supports either `local` or `radius` user authentication: + +.. code-block:: sh + + set vpn l2tp remote-access authentication mode <local|radius> + +In addition one or more RADIUS_ servers can be configured to server for user +authentication. This is done using the `radius server` and `radius server key` +nodes: + +.. code-block:: sh + + set vpn l2tp remote-access authentication radius server 1.1.1.1 key 'foo' + set vpn l2tp remote-access authentication radius server 2.2.2.2 key 'foo' + +.. note:: Some RADIUS_ severs make use of an access control list who is allowed + to query the server. Please configure your VyOS router in the allowed client + list. + +RADIUS source address +********************* + +If you are using e.g. OSPF as IGP always the nearest interface facing the RADIUS +server is used. With VyOS 1.2 you can bind all outgoing RADIUS requests to a +single source IP e.g. the loopback interface. + +.. code-block:: sh + + set vpn l2tp remote-access authentication radius source-address 3.3.3.3 + +Above command will use `3.3.3.3` as source IPv4 address for all RADIUS queries +on this NAS. diff --git a/docs/vpn/openvpn.rst b/docs/vpn/openvpn.rst new file mode 100644 index 00000000..2064860d --- /dev/null +++ b/docs/vpn/openvpn.rst @@ -0,0 +1,222 @@ +.. _openvpn: + +OpenVPN +------- + +Traditionally hardware routers implement IPsec exclusively due to relative +ease of implementing it in hardware and insufficient CPU power for doing +encryption in software. Since VyOS is a software router, this is less of a +concern. OpenVPN has been widely used on UNIX platform for a long time and is +a popular option for remote access VPN, though it's also capable of +site-to-site connections. + +The advantages of OpenVPN are: +* It uses a single TCP or UDP connection and does not rely on packet source +addresses, so it will work even through a double NAT: perfect for public +hotspots and such + +* It's easy to setup and offers very flexible split tunneling + +* There's a variety of client GUI frontends for any platform + +The disadvantages are: +* It's slower than IPsec due to higher protocol overhead and the fact it runs +in user mode while IPsec, on Linux, is in kernel mode + +* None of the operating systems have client software installed by default + +In the VyOS CLI, a key point often overlooked is that rather than being +configured using the `set vpn` stanza, OpenVPN is configured as a network +interface using `set interfaces openvpn`. + +OpenVPN Site-To-Site +^^^^^^^^^^^^^^^^^^^^ + +While many are aware of OpenVPN as a Client VPN solution, it is often +overlooked as a site-to-site VPN solution due to lack of support for this mode +in many router platforms. + +Site-to-site mode supports x.509 but doesn't require it and can also work with +static keys, which is simpler in many cases. In this example, we'll configure +a simple site-to-site OpenVPN tunnel using a 2048-bit pre-shared key. + +First, one one of the systems generate the key using the operational command +`generate openvpn key <filename>`. This will generate a key with the name +provided in the `/config/auth/` directory. Once generated, you will need to +copy this key to the remote router. + +In our example, we used the filename `openvpn-1.key` which we will reference +in our configuration. + +* The public IP address of the local side of the VPN will be 198.51.100.10 +* The remote will be 203.0.113.11 +* The tunnel will use 10.255.1.1 for the local IP and 10.255.1.2 for the remote. +* OpenVPN allows for either TCP or UDP. UDP will provide the lowest latency, + while TCP will work better for lossy connections; generally UDP is preferred + when possible. +* The official port for OpenVPN is 1194, which we reserve for client VPN; we + will use 1195 for site-to-site VPN. +* The `persistent-tunnel` directive will allow us to configure tunnel-related + attributes, such as firewall policy as we would on any normal network + interface. +* If known, the IP of the remote router can be configured using the + `remote-host` directive; if unknown, it can be omitted. We will assume a + dynamic IP for our remote router. + +Local Configuration: + +.. code-block:: sh + + set interfaces openvpn vtun1 mode site-to-site + set interfaces openvpn vtun1 protocol udp + set interfaces openvpn vtun1 persistent-tunnel + set interfaces openvpn vtun1 local-host '198.51.100.10' + set interfaces openvpn vtun1 local-port '1195' + set interfaces openvpn vtun1 remote-port '1195' + set interfaces openvpn vtun1 shared-secret-key-file '/config/auth/openvpn-1.key' + set interfaces openvpn vtun1 local-address '10.255.1.1' + set interfaces openvpn vtun1 remote-address '10.255.1.2' + +Remote Configuration: + +.. code-block:: sh + + set interfaces openvpn vtun1 mode site-to-site + set interfaces openvpn vtun1 protocol udp + set interfaces openvpn vtun1 persistent-tunnel + set interfaces openvpn vtun1 remote-host '198.51.100.10' + set interfaces openvpn vtun1 local-port '1195' + set interfaces openvpn vtun1 remote-port '1195' + set interfaces openvpn vtun1 shared-secret-key-file '/config/auth/openvpn-1.key' + set interfaces openvpn vtun1 local-address '10.255.1.2' + set interfaces openvpn vtun1 remote-address '10.255.1.1' + +The configurations above will default to using 128-bit Blowfish in CBC mode +for encryption and SHA-1 for HMAC authentication. These are both considered +weak, but a number of other encryption and hashing algorithms are available: + +For Encryption: + +.. code-block:: sh + + vyos@vyos# set interfaces openvpn vtun1 encryption + Possible completions: + des DES algorithm + 3des DES algorithm with triple encryption + bf128 Blowfish algorithm with 128-bit key + bf256 Blowfish algorithm with 256-bit key + aes128 AES algorithm with 128-bit key + aes192 AES algorithm with 192-bit key + aes256 AES algorithm with 256-bit key + +For Hashing: + +.. code-block:: sh + + vyos@vyos# set interfaces openvpn vtun1 hash + Possible completions: + md5 MD5 algorithm + sha1 SHA-1 algorithm + sha256 SHA-256 algorithm + sha512 SHA-512 algorithm + +If you change the default encryption and hashing algorithms, be sure that the +local and remote ends have matching configurations, otherwise the tunnel will +not come up. + +Static routes can be configured referencing the tunnel interface; for example, +the local router will use a network of 10.0.0.0/16, while the remote has a +network of 10.1.0.0/16: + +Local Configuration: + +.. code-block:: sh + + set protocols static interface-route 10.1.0.0/16 next-hop-interface vtun1 + +Remote Configuration: + +.. code-block:: sh + + set protocols static interface-route 10.0.0.0/16 next-hop-interface vtun1 + +Firewall policy can also be applied to the tunnel interface for `local`, `in`, +and `out` directions and function identically to ethernet interfaces. + +If making use of multiple tunnels, OpenVPN must have a way to distinguish +between different tunnels aside from the pre-shared-key. This is either by +referencing IP address or port number. One option is to dedicate a public IP +to each tunnel. Another option is to dedicate a port number to each tunnel +(e.g. 1195,1196,1197...). + +OpenVPN status can be verified using the `show openvpn` operational commands. +See the built-in help for a complete list of options. + +OpenVPN Server +^^^^^^^^^^^^^^ + +Multi-client server is the most popular OpenVPN mode on routers. It always uses +x.509 authentication and therefore requires a PKI setup. This guide assumes you +have already setup a PKI and have a CA certificate, a server certificate and +key, a certificate revokation list, a Diffie-Hellman key exchange parameters +file. You do not need client certificates and keys for the server setup. + +In this example we will use the most complicated case: a setup where each +client is a router that has its own subnet (think HQ and branch offices), since +simpler setups are subsets of it. + +Suppose you want to use 10.23.1.0/24 network for client tunnel endpoints and +all client subnets belong to 10.23.0.0/20. All clients need access to the +192.168.0.0/16 network. + +First we need to specify the basic settings. 1194/UDP is the default. The +`persistent-tunnel` option is recommended, it prevents the TUN/TAP device from +closing on connection resets or daemon reloads. + +.. code-block:: sh + + set interfaces openvpn vtun10 mode server + set interfaces openvpn vtun10 local-port 1194 + set interfaces openvpn vtun10 persistent-tunnel + set interfaces openvpn vtun10 protocol udp + +Then we need to specify the location of the cryptographic materials. Suppose +you keep the files in `/config/auth/openvpn` + +.. code-block:: sh + + set interfaces openvpn vtun10 tls ca-cert-file /config/auth/openvpn/ca.crt + set interfaces openvpn vtun10 tls cert-file /config/auth/openvpn/server.crt + set interfaces openvpn vtun10 tls key-file /config/auth/openvpn/server.key + set interfaces openvpn vtun10 tls crl-file /config/auth/openvpn/crl.pem + set interfaces openvpn vtun10 tls dh-file /config/auth/openvpn/dh2048.pem + +Now we need to specify the server network settings. In all cases we need to +specify the subnet for client tunnel endpoints. Since we want clients to access +a specific network behind out router, we will use a push-route option for +installing that route on clients. + +.. code-block:: sh + + set interfaces openvpn vtun10 server push-route 192.168.0.0/16 + set interfaces openvpn vtun10 server subnet 10.23.1.0/24 + +Since it's a HQ and branch offices setup, we will want all clients to have +fixed addresses and we will route traffic to specific subnets through them. We +need configuration for each client to achieve this. + +.. note:: Clients are identified by the CN field of their x.509 certificates, + in this example the CN is ``client0``: + +.. code-block:: sh + + set interfaces openvpn vtun10 server client client0 ip 10.23.1.10 + set interfaces openvpn vtun10 server client client0 subnet 10.23.2.0/25 + +OpenVPN **will not** automatically create routes in the kernel for client +subnets when they connect and will only use client-subnet association +internally, so we need to create a route to the 10.23.0.0/20 network ourselves: + +.. code-block:: sh + + set protocols static interface-route 10.23.0.0/20 next-hop-interface vtun10 diff --git a/docs/vpn/pptp.rst b/docs/vpn/pptp.rst new file mode 100644 index 00000000..2d560919 --- /dev/null +++ b/docs/vpn/pptp.rst @@ -0,0 +1,47 @@ +.. _pptp: + +PPTP-Server +----------- + +The Point-to-Point Tunneling Protocol (PPTP_) has been implemented in VyOS only for backwards compatibility. +PPTP has many well known secrurity issues and you should use one of the many other new VPN implementations. + +As per default and if not otherwise defined, mschap-v2 is being used for authentication and mppe 128-bit (stateless) for encryption. +If no gateway-address is set within the configuration, the lowest IP out of the /24 client-ip-pool is being used. For instance, in the example below it would be 192.168.0.1. + +server example +^^^^^^^^^^^^^^ + +.. code-block:: sh + + set vpn pptp remote-access authentication local-users username test password 'test' + set vpn pptp remote-access authentication mode 'local' + set vpn pptp remote-access client-ip-pool start '192.168.0.10' + set vpn pptp remote-access client-ip-pool stop '192.168.0.15' + set vpn pptp remote-access gateway-address '10.100.100.1' + set vpn pptp remote-access outside-address '10.1.1.120' + + +client example (debian 9) +^^^^^^^^^^^^^^^^^^^^^^^^^ + +Install the client software via apt and execute pptpsetup to generate the configuration. + + +.. code-block:: sh + + apt-get install pptp-linux + pptpsetup --create TESTTUNNEL --server 10.1.1.120 --username test --password test --encrypt + pon TESTTUNNEL + +The command pon TESTUNNEL establishes the PPTP tunnel to the remote system. + + +All tunnel sessions can be checked via: + +.. code-block:: sh + + run sh pptp-server sessions + ifname | username | calling-sid | ip | type | comp | state | uptime + --------+----------+-------------+--------------+------+------+--------+---------- + ppp0 | test | 10.1.1.99 | 192.168.0.10 | pptp | mppe | active | 00:00:58 diff --git a/docs/vpn/references.rst b/docs/vpn/references.rst new file mode 100644 index 00000000..49b65cb0 --- /dev/null +++ b/docs/vpn/references.rst @@ -0,0 +1,10 @@ +.. _`Google Public DNS`: https://developers.google.com/speed/public-dns +.. _Quad9: https://quad9.net +.. _CloudFlare: https://blog.cloudflare.com/announcing-1111 +.. _RADIUS: https://en.wikipedia.org/wiki/RADIUS +.. _FreeRADIUS: https://freeradius.org +.. _`Network Policy Server`: https://en.wikipedia.org/wiki/Network_Policy_Server +.. _RFC2332: https://tools.ietf.org/html/rfc2332 +.. _RFC1702: https://tools.ietf.org/html/rfc1702 +.. _RFC4301: https://tools.ietf.org/html/rfc4301 +.. _PPTP: https://en.wikipedia.org/wiki/Point-to-Point_Tunneling_Protocol diff --git a/docs/vpn/site2site_ipsec.rst b/docs/vpn/site2site_ipsec.rst new file mode 100644 index 00000000..f420112a --- /dev/null +++ b/docs/vpn/site2site_ipsec.rst @@ -0,0 +1,109 @@ +.. _size2site_ipsec: + +Site-to-Site IPsec +------------------ + +Example: +* eth1 is WAN interface +* left subnet: 192.168.0.0/24 #s ite1, server side (i.e. locality, actually +there is no client or server roles) +* left local_ip: 1.1.1.1 # server side WAN IP +* right subnet: 10.0.0.0/24 # site2,remote office side +* right local_ip: 2.2.2.2 # remote office side WAN IP + +.. code-block:: sh + + # server config + set vpn ipsec esp-group office-srv-esp compression 'disable' + set vpn ipsec esp-group office-srv-esp lifetime '1800' + set vpn ipsec esp-group office-srv-esp mode 'tunnel' + set vpn ipsec esp-group office-srv-esp pfs 'enable' + set vpn ipsec esp-group office-srv-esp proposal 1 encryption 'aes256' + set vpn ipsec esp-group office-srv-esp proposal 1 hash 'sha1' + set vpn ipsec ike-group office-srv-ike ikev2-reauth 'no' + set vpn ipsec ike-group office-srv-ike key-exchange 'ikev1' + set vpn ipsec ike-group office-srv-ike lifetime '3600' + set vpn ipsec ike-group office-srv-ike proposal 1 encryption 'aes256' + set vpn ipsec ike-group office-srv-ike proposal 1 hash 'sha1' + set vpn ipsec ipsec-interfaces interface 'eth1' + set vpn ipsec site-to-site peer 2.2.2.2 authentication mode 'pre-shared-secret' + set vpn ipsec site-to-site peer 2.2.2.2 authentication pre-shared-secret 'SomePreSharedKey' + set vpn ipsec site-to-site peer 2.2.2.2 ike-group 'office-srv-ike' + set vpn ipsec site-to-site peer 2.2.2.2 local-address '1.1.1.1' + set vpn ipsec site-to-site peer 2.2.2.2 tunnel 0 allow-nat-networks 'disable' + set vpn ipsec site-to-site peer 2.2.2.2 tunnel 0 allow-public-networks 'disable' + set vpn ipsec site-to-site peer 2.2.2.2 tunnel 0 esp-group 'office-srv-esp' + set vpn ipsec site-to-site peer 2.2.2.2 tunnel 0 local prefix '192.168.0.0/24' + set vpn ipsec site-to-site peer 2.2.2.2 tunnel 0 remote prefix '10.0.0.0/21' + + # remote office config + set vpn ipsec esp-group office-srv-esp compression 'disable' + set vpn ipsec esp-group office-srv-esp lifetime '1800' + set vpn ipsec esp-group office-srv-esp mode 'tunnel' + set vpn ipsec esp-group office-srv-esp pfs 'enable' + set vpn ipsec esp-group office-srv-esp proposal 1 encryption 'aes256' + set vpn ipsec esp-group office-srv-esp proposal 1 hash 'sha1' + set vpn ipsec ike-group office-srv-ike ikev2-reauth 'no' + set vpn ipsec ike-group office-srv-ike key-exchange 'ikev1' + set vpn ipsec ike-group office-srv-ike lifetime '3600' + set vpn ipsec ike-group office-srv-ike proposal 1 encryption 'aes256' + set vpn ipsec ike-group office-srv-ike proposal 1 hash 'sha1' + set vpn ipsec ipsec-interfaces interface 'eth1' + set vpn ipsec site-to-site peer 1.1.1.1 authentication mode 'pre-shared-secret' + set vpn ipsec site-to-site peer 1.1.1.1 authentication pre-shared-secret 'SomePreSharedKey' + set vpn ipsec site-to-site peer 1.1.1.1 ike-group 'office-srv-ike' + set vpn ipsec site-to-site peer 1.1.1.1 local-address '2.2.2.2' + set vpn ipsec site-to-site peer 1.1.1.1 tunnel 0 allow-nat-networks 'disable' + set vpn ipsec site-to-site peer 1.1.1.1 tunnel 0 allow-public-networks 'disable' + set vpn ipsec site-to-site peer 1.1.1.1 tunnel 0 esp-group 'office-srv-esp' + set vpn ipsec site-to-site peer 1.1.1.1 tunnel 0 local prefix '10.0.0.0/21' + set vpn ipsec site-to-site peer 1.1.1.1 tunnel 0 remote prefix '192.168.0.0/24' + +Show status of new setup: + +.. code-block:: sh + + vyos@srv-gw0:~$ show vpn ike sa + Peer ID / IP Local ID / IP + ------------ ------------- + 2.2.2.2 1.1.1.1 + State Encrypt Hash D-H Grp NAT-T A-Time L-Time + ----- ------- ---- ------- ----- ------ ------ + up aes256 sha1 5 no 734 3600 + + vyos@srv-gw0:~$ show vpn ipsec sa + Peer ID / IP Local ID / IP + ------------ ------------- + 2.2.2.2 1.1.1.1 + Tunnel State Bytes Out/In Encrypt Hash NAT-T A-Time L-Time Proto + ------ ----- ------------- ------- ---- ----- ------ ------ ----- + 0 up 7.5M/230.6K aes256 sha1 no 567 1800 all + +If there is SNAT rules on eth1, need to add exclude rule + +.. code-block:: sh + + # server side + set nat source rule 10 destination address '10.0.0.0/24' + set nat source rule 10 'exclude' + set nat source rule 10 outbound-interface 'eth1' + set nat source rule 10 source address '192.168.0.0/24' + + # remote office side + set nat source rule 10 destination address '192.168.0.0/24' + set nat source rule 10 'exclude' + set nat source rule 10 outbound-interface 'eth1' + set nat source rule 10 source address '10.0.0.0/24' + +To allow traffic to pass through to clients, you need to add the following +rules. (if you used the default configuration at the top of this page) + +.. code-block:: sh + + # server side + set firewall name OUTSIDE-LOCAL rule 32 action 'accept' + set firewall name OUTSIDE-LOCAL rule 32 source address '10.0.0.0/24' + + # remote office side + set firewall name OUTSIDE-LOCAL rule 32 action 'accept' + set firewall name OUTSIDE-LOCAL rule 32 source address '192.168.0.0/24' |