Migrate new file structure to crux (#435)

* order workflows and add submodule

* rename gitmodules file

* delete docs/.gitignore

* add vyos custom linter

* correct __pycache__ in gitignore

* add test-coverage.py

* move draw.io folder

* arrange changelog, install history and about

* arrange: firewall

* arrange: highavailability

* arrange: loadbalancing

* arrange: nat

* arrange: services

* sort configexamples and configuration interfaces

* wireles: rename wireless

* rearrange: Protocols and Policy

* rearrange: Firewall and Zone Policy

* rearrange: Interfaces

* rearrange: Interfaces

* rearrange: dynamic DNS

* hostinfo: add page to index

* rearrange: appendix

* venv: add Pipfile

* rearrange: contributing

* index: remove debugging

* rearrange: fix all figure and refs

* rearrange: commandtree

* fix: cli, openvpn, install headline level

* protocols: change headline

* firewall: move mss clamping

* ip: separate ipv4 and ipv6

* arp: move to static page

* igmp: rename multicast page

* Update to year 2021

1 files changed, 144 insertions, 0 deletions

diff --git a/docs/configuration/protocols/bgp.rst b/docs/configuration/protocols/bgp.rst
new file mode 100644
index 00000000..f0550fd4
--- /dev/null
+++ b/docs/configuration/protocols/bgp.rst
@@ -0,0 +1,144 @@
+.. _routing-bgp:
+
+Border Gateway Protocol (BGP)
+-----------------------------
+
+IPv4
+^^^^
+
+A simple eBGP configuration:
+
+**Node 1:**
+
+.. code-block:: none
+
+  set protocols bgp 65534 neighbor 192.168.0.2 ebgp-multihop '2'
+  set protocols bgp 65534 neighbor 192.168.0.2 remote-as '65535'
+  set protocols bgp 65534 neighbor 192.168.0.2 update-source '192.168.0.1'
+  set protocols bgp 65534 address-family ipv4-unicast network '172.16.0.0/16'
+  set protocols bgp 65534 parameters router-id '192.168.0.1'
+
+**Node 2:**
+
+.. code-block:: none
+
+  set protocols bgp 65535 neighbor 192.168.0.1 ebgp-multihop '2'
+  set protocols bgp 65535 neighbor 192.168.0.1 remote-as '65534'
+  set protocols bgp 65535 neighbor 192.168.0.1 update-source '192.168.0.2'
+  set protocols bgp 65535 address-family ipv4-unicast network '172.17.0.0/16'
+  set protocols bgp 65535 parameters router-id '192.168.0.2'
+
+
+Don't forget, the CIDR declared in the network statement MUST **exist in your
+routing table (dynamic or static), the best way to make sure that is true is
+creating a static route:**
+
+**Node 1:**
+
+.. code-block:: none
+
+  set protocols static route 172.16.0.0/16 blackhole distance '254'
+
+**Node 2:**
+
+.. code-block:: none
+
+  set protocols static route 172.17.0.0/16 blackhole distance '254'
+
+
+IPv6
+^^^^
+
+A simple BGP configuration via IPv6.
+
+**Node 1:**
+
+.. code-block:: none
+
+  set protocols bgp 65534 neighbor 2001:db8::2 ebgp-multihop '2'
+  set protocols bgp 65534 neighbor 2001:db8::2 remote-as '65535'
+  set protocols bgp 65534 neighbor 2001:db8::2 update-source '2001:db8::1'
+  set protocols bgp 65534 neighbor 2001:db8::2 address-family ipv6-unicast
+  set protocols bgp 65534 address-family ipv6-unicast network '2001:db8:1::/48'
+  set protocols bgp 65534 parameters router-id '10.1.1.1'
+
+**Node 2:**
+
+.. code-block:: none
+
+  set protocols bgp 65535 neighbor 2001:db8::1 ebgp-multihop '2'
+  set protocols bgp 65535 neighbor 2001:db8::1 remote-as '65534'
+  set protocols bgp 65535 neighbor 2001:db8::1 update-source '2001:db8::2'
+  set protocols bgp 65535 neighbor 2001:db8::1 address-family ipv6-unicast
+  set protocols bgp 65535 address-family ipv6-unicast network '2001:db8:2::/48'
+  set protocols bgp 65535 parameters router-id '10.1.1.2'
+
+Don't forget, the CIDR declared in the network statement **MUST exist in your
+routing table (dynamic or static), the best way to make sure that is true is
+creating a static route:**
+
+**Node 1:**
+
+.. code-block:: none
+
+  set protocols static route6 2001:db8:1::/48 blackhole distance '254'
+
+**Node 2:**
+
+.. code-block:: none
+
+  set protocols static route6 2001:db8:2::/48 blackhole distance '254'
+
+Route Filter
+^^^^^^^^^^^^
+
+Route filter can be applied using a route-map:
+
+**Node1:**
+
+.. code-block:: none
+
+  set policy prefix-list AS65535-IN rule 10 action 'permit'
+  set policy prefix-list AS65535-IN rule 10 prefix '172.16.0.0/16'
+  set policy prefix-list AS65535-OUT rule 10 action 'deny'
+  set policy prefix-list AS65535-OUT rule 10 prefix '172.16.0.0/16'
+  set policy prefix-list6 AS65535-IN rule 10 action 'permit'
+  set policy prefix-list6 AS65535-IN rule 10 prefix '2001:db8:2::/48'
+  set policy prefix-list6 AS65535-OUT rule 10 action 'deny'
+  set policy prefix-list6 AS65535-OUT rule 10 prefix '2001:db8:2::/48'
+  set policy route-map AS65535-IN rule 10 action 'permit'
+  set policy route-map AS65535-IN rule 10 match ip address prefix-list 'AS65535-IN'
+  set policy route-map AS65535-IN rule 10 match ipv6 address prefix-list 'AS65535-IN'
+  set policy route-map AS65535-IN rule 20 action 'deny'
+  set policy route-map AS65535-OUT rule 10 action 'deny'
+  set policy route-map AS65535-OUT rule 10 match ip address prefix-list 'AS65535-OUT'
+  set policy route-map AS65535-OUT rule 10 match ipv6 address prefix-list 'AS65535-OUT'
+  set policy route-map AS65535-OUT rule 20 action 'permit'
+  set protocols bgp 65534 neighbor 2001:db8::2 route-map export 'AS65535-OUT'
+  set protocols bgp 65534 neighbor 2001:db8::2 route-map import 'AS65535-IN'
+
+**Node2:**
+
+.. code-block:: none
+
+  set policy prefix-list AS65534-IN rule 10 action 'permit'
+  set policy prefix-list AS65534-IN rule 10 prefix '172.17.0.0/16'
+  set policy prefix-list AS65534-OUT rule 10 action 'deny'
+  set policy prefix-list AS65534-OUT rule 10 prefix '172.17.0.0/16'
+  set policy prefix-list6 AS65534-IN rule 10 action 'permit'
+  set policy prefix-list6 AS65534-IN rule 10 prefix '2001:db8:1::/48'
+  set policy prefix-list6 AS65534-OUT rule 10 action 'deny'
+  set policy prefix-list6 AS65534-OUT rule 10 prefix '2001:db8:1::/48'
+  set policy route-map AS65534-IN rule 10 action 'permit'
+  set policy route-map AS65534-IN rule 10 match ip address prefix-list 'AS65534-IN'
+  set policy route-map AS65534-IN rule 10 match ipv6 address prefix-list 'AS65534-IN'
+  set policy route-map AS65534-IN rule 20 action 'deny'
+  set policy route-map AS65534-OUT rule 10 action 'deny'
+  set policy route-map AS65534-OUT rule 10 match ip address prefix-list 'AS65534-OUT'
+  set policy route-map AS65534-OUT rule 10 match ipv6 address prefix-list 'AS65534-OUT'
+  set policy route-map AS65534-OUT rule 20 action 'permit'
+  set protocols bgp 65535 neighbor 2001:db8::1 route-map export 'AS65534-OUT'
+  set protocols bgp 65535 neighbor 2001:db8::1 route-map import 'AS65534-IN'
+
+We could expand on this and also deny link local and multicast in the rule 20
+action deny.