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, 77 insertions, 0 deletions

diff --git a/docs/configexamples/dhcp-relay-through-gre-bridge.rst b/docs/configexamples/dhcp-relay-through-gre-bridge.rst
new file mode 100644
index 00000000..f94eb67f
--- /dev/null
+++ b/docs/configexamples/dhcp-relay-through-gre-bridge.rst
@@ -0,0 +1,77 @@
+.. _examples-dhcp-relay-through-gre-bridge:
+
+
+DHCP Relay through GRE-Bridge
+-----------------------------
+
+Diagram
+^^^^^^^
+
+.. image:: /_static/images/dhcp-relay-through-gre-bridge.png
+   :width: 80%
+   :align: center
+   :alt: Network Topology Diagram
+
+Configuration
+^^^^^^^^^^^^^
+
+DHCP Server
+"""""""""""
+
+.. code-block:: none
+
+   set interfaces ethernet eth0 address '10.0.2.1/24'
+   set interfaces loopback lo address '3.3.3.3/24'
+   set interfaces tunnel tun100 address '172.16.0.2/30'
+   set interfaces tunnel tun100 encapsulation 'gre-bridge'
+   set interfaces tunnel tun100 local-ip '10.0.2.1'
+   set interfaces tunnel tun100 remote-ip '192.168.0.1'
+   set protocols ospf area 0 network '3.3.3.0/24'
+   set protocols ospf area 0 network '10.0.2.0/24'
+   set protocols ospf parameters router-id '3.3.3.3'
+   set protocols static interface-route 10.0.1.2/32 next-hop-interface tun100
+   set service dhcp-server shared-network-name asdf authoritative
+   set service dhcp-server shared-network-name asdf subnet 3.3.3.0/24 range 0 start '3.3.3.30'
+   set service dhcp-server shared-network-name asdf subnet 3.3.3.0/24 range 0 stop '3.3.3.40'
+   set service dhcp-server shared-network-name asdf subnet 10.0.1.0/24 default-router '10.0.1.2'
+   set service dhcp-server shared-network-name asdf subnet 10.0.1.0/24 range 0 start '10.0.1.200'
+   set service dhcp-server shared-network-name asdf subnet 10.0.1.0/24 range 0 stop '10.0.1.210'
+   set service dhcp-server shared-network-name asdf subnet 10.2.1.0/24 range 0 start '10.2.1.222'
+   set service dhcp-server shared-network-name asdf subnet 10.2.1.0/24 range 0 stop '10.2.1.233'
+   set service dhcp-server shared-network-name asdf subnet 172.16.0.0/30 range 0 start '172.16.0.1'
+   set service dhcp-server shared-network-name asdf subnet 172.16.0.0/30 range 0 stop '172.16.0.2'
+   
+
+In-Between Router
+"""""""""""""""""
+
+.. code-block:: none
+
+   set interfaces ethernet eth0 address '192.168.0.2/24'
+   set interfaces ethernet eth1 address '10.0.2.2/24'
+   set protocols ospf area 0 network '192.168.0.0/24'
+   set protocols ospf area 0 network '10.0.2.0/24'
+   set protocols ospf parameters router-id '192.168.0.2'
+   
+
+DHCP Relay
+""""""""""
+
+.. code-block:: none
+
+   set interfaces ethernet eth0 address '10.0.1.2/24'
+   set interfaces ethernet eth1 address '192.168.0.1/24'
+   set interfaces loopback lo address '1.1.1.1'
+   set interfaces tunnel tun100 address '172.16.0.1/30'
+   set interfaces tunnel tun100 encapsulation 'gre-bridge'
+   set interfaces tunnel tun100 local-ip '192.168.0.1'
+   set interfaces tunnel tun100 remote-ip '10.0.2.1'
+   set protocols ospf area 0 network '10.0.1.0/24'
+   set protocols ospf area 0 network '192.168.0.0/24'
+   set protocols ospf area 0 network '1.1.1.0/24'
+   set protocols ospf parameters router-id '1.1.1.1'
+   set protocols static interface-route 3.3.3.3/32 next-hop-interface tun100
+   set service dhcp-relay interface 'eth0'
+   set service dhcp-relay interface 'tun100'
+   set service dhcp-relay server '3.3.3.3'
+