IT FUCKING WORKS

2022-11-01 10:56:35 +01:00
parent 59730c534c
commit 47a99bfcbe
7 changed files with 704 additions and 109 deletions
@@ -0,0 +1,136 @@
+# ==== CONSTANTS ====
+
+define OWNAS = 550001; # your autonomous system number
+
+# the first non-zero IPv4 you control. Since we're only using
+# IPv6. Use the first non-zero 32 bits you control. E.g., if
+# you control 255::/16, use 2.85.0.1 (255 is two hex bytes, 
+# 0x02, and 0x55 which is 2.85 in a v4 addr).
+define OWNIP = 2.0.0.1;
+
+# the router's actual IPv6 addr that it can be reached by.
+define OWNIPv6 = 200::1;
+
+# the subnet you control
+define OWNNETv6 = 200::/16;
+
+# set of all addrs you control.
+define OWNNETSETv6 = [200::/16+];
+
+# ===================
+
+router id OWNIP;
+
+# "everything" is a protocol in bird. The `device` protocol is not really
+# a protocol, it just instructs bird to ask the kernel for information
+# on devices (interfaces).
+protocol device {
+  # scan devices every 10 seconds.
+  scan time 10;
+}
+
+# ==== UTILITY FUNCTIONS ====
+
+function is_self_net() {
+  return net ~ OWNNETSETv6;
+}
+
+function is_valid_network() {
+  return net ~ [
+    0200::/7+
+  ];
+}
+
+# Tell bird how to interact with the kernel (modify routes):
+#
+# Again, not really a protocol but ¯\_(ツ)_/¯
+protocol kernel {
+  # scan the routing table every 20 seconds (update bird state).
+  scan time 20;
+  
+  # configure ipv6
+  ipv6 {
+    # Don't import any routes from the kernel, let bird figure out
+    # what routes to add or change. `none` is a "filter" that discards
+    # routes that are given to it. The kernel gives bird routes and we
+    # want bird to ignore them. kernel -> bird.
+    import none;
+  
+    # We write an inline filter that describes what routes to give the
+    # kernel from bird. bird -> kernel.
+    export filter {
+      # if the source of this route is static configuration, then we
+      # don't want to give it to the kernel. (only want dynamic routes).
+      # I don't know why this is important? Is that right?
+      if source = RTS_STATIC then reject;
+      # set the `krt_prefsrc` attribute for this route.
+      # see comment above above the kernel block.
+      krt_prefsrc = OWNIPv6;
+      # accept this route (don't filter it out).
+      accept;
+    };
+  };
+}
+
+# Static protocol lets you define static routes that do not change.
+protocol static {
+  # reject any routes in our subnet (I think?)
+  route OWNNETv6 reject;
+
+  ipv6 {
+    # tell bird about everything. static -> bird.
+    import all;
+    # bird can't configure static routes (default)?.
+    # bird -> static.
+    export none;
+  };
+}
+
+# Create a template for the `bgp` protocol. This is where the real
+# magic happens. We use a template since every peer will essentially
+# have the same BGP configuration. The template name is `alapeers`.
+#
+# Each peer gets its own template nad file under `peers6/*``.
+#
+# We're using BGP in "exterior" or `eBGP` mode. This means we're using
+# the protocol to define routes between Autonomous Systems, not really
+# between individual IP addrs.
+#
+# Each instance of the `bgp` protocol corresponds with one neighboring
+# router, or in our case, a peer.
+template bgp alapeers {
+  # our `as` number is the OWNAS constant. This is defined in the local
+  # defs file that comes later.
+  local as OWNAS;
+  # compare path lengths to determine which route is the best one.
+  path metric 1;
+  
+  ipv6 {
+    # only accept routes from peers that follow this inline filter.
+    # bgp -> bird.
+    import filter {
+      # Accept the route if its a valid network and is not our
+      # own network. (fns defined in local defs file).
+      if is_valid_network() && !is_self_net() then {
+        accept;
+      }
+      reject;
+    };
+    # only send routes that follow this inline filter.
+    # bird -> bgp (other peers).
+    export filter {
+      # Only send if it's a valid netowrk and the route comes from
+      # static configuration or from BGP.
+      if is_valid_network() && source ~ [RTS_STATIC, RTS_BGP] then {
+        accept;
+      }
+      reject;
+    };
+    # Only allow for 1000 total routes to be imported. Once we hit
+    # 1000, block further routes. 
+    import limit 1000 action block;
+  };
+}
+
+# Include all of our peers!
+include "peers/*";
@@ -0,0 +1,3 @@
+protocol bgp test_router_peer from alapeers {
+  neighbor 255::1 as 550002; # as == autonomous system
+}
@@ -0,0 +1,136 @@
+# ==== CONSTANTS ====
+
+define OWNAS = <OWNAS>; # your autonomous system number
+
+# the first non-zero IPv4 you control. Since we're only using
+# IPv6. Use the first non-zero 32 bits you control. E.g., if
+# you control 255::/16, use 2.85.0.1 (255 is two hex bytes, 
+# 0x02, and 0x55 which is 2.85 in a v4 addr).
+define OWNIP = <OWNIP>;
+
+# the router's actual IPv6 addr that it can be reached by.
+define OWNIPv6 = <OWNIPv6>;
+
+# the subnet you control
+define OWNNETv6 = <OWNNET>;
+
+# set of all addrs you control.
+define OWNNETSETv6 = [<OWNNET>+];
+
+# ===================
+
+router id OWNIP;
+
+# "everything" is a protocol in bird. The `device` protocol is not really
+# a protocol, it just instructs bird to ask the kernel for information
+# on devices (interfaces).
+protocol device {
+  # scan devices every 10 seconds.
+  scan time 10;
+}
+
+# ==== UTILITY FUNCTIONS ====
+
+function is_self_net() {
+  return net ~ OWNNETSETv6;
+}
+
+function is_valid_network() {
+  return net ~ [
+    0200::/7+
+  ];
+}
+
+# Tell bird how to interact with the kernel (modify routes):
+#
+# Again, not really a protocol but ¯\_(ツ)_/¯
+protocol kernel {
+  # scan the routing table every 20 seconds (update bird state).
+  scan time 20;
+  
+  # configure ipv6
+  ipv6 {
+    # Don't import any routes from the kernel, let bird figure out
+    # what routes to add or change. `none` is a "filter" that discards
+    # routes that are given to it. The kernel gives bird routes and we
+    # want bird to ignore them. kernel -> bird.
+    import none;
+  
+    # We write an inline filter that describes what routes to give the
+    # kernel from bird. bird -> kernel.
+    export filter {
+      # if the source of this route is static configuration, then we
+      # don't want to give it to the kernel. (only want dynamic routes).
+      # I don't know why this is important? Is that right?
+      if source = RTS_STATIC then reject;
+      # set the `krt_prefsrc` attribute for this route.
+      # see comment above above the kernel block.
+      krt_prefsrc = OWNIPv6;
+      # accept this route (don't filter it out).
+      accept;
+    };
+  };
+}
+
+# Static protocol lets you define static routes that do not change.
+protocol static {
+  # reject any routes in our subnet (I think?)
+  route OWNNETv6 reject;
+
+  ipv6 {
+    # tell bird about everything. static -> bird.
+    import all;
+    # bird can't configure static routes (default)?.
+    # bird -> static.
+    export none;
+  };
+}
+
+# Create a template for the `bgp` protocol. This is where the real
+# magic happens. We use a template since every peer will essentially
+# have the same BGP configuration. The template name is `alapeers`.
+#
+# Each peer gets its own template nad file under `peers6/*``.
+#
+# We're using BGP in "exterior" or `eBGP` mode. This means we're using
+# the protocol to define routes between Autonomous Systems, not really
+# between individual IP addrs.
+#
+# Each instance of the `bgp` protocol corresponds with one neighboring
+# router, or in our case, a peer.
+template bgp alapeers {
+  # our `as` number is the OWNAS constant. This is defined in the local
+  # defs file that comes later.
+  local as OWNAS;
+  # compare path lengths to determine which route is the best one.
+  path metric 1;
+  
+  ipv6 {
+    # only accept routes from peers that follow this inline filter.
+    # bgp -> bird.
+    import filter {
+      # Accept the route if its a valid network and is not our
+      # own network. (fns defined in local defs file).
+      if is_valid_network() && !is_self_net() then {
+        accept;
+      }
+      reject;
+    };
+    # only send routes that follow this inline filter.
+    # bird -> bgp (other peers).
+    export filter {
+      # Only send if it's a valid netowrk and the route comes from
+      # static configuration or from BGP.
+      if is_valid_network() && source ~ [RTS_STATIC, RTS_BGP] then {
+        accept;
+      }
+      reject;
+    };
+    # Only allow for 1000 total routes to be imported. Once we hit
+    # 1000, block further routes. 
+    import limit 1000 action block;
+  };
+}
+
+# Include all of our peers!
+include "peers/*";
@@ -0,0 +1,3 @@
+protocol bgp <PEER_NAME> from alapeers {
+  neighbor <PEERING_IP> as <PEER_AS>; # as == autonomous system
+}
@@ -0,0 +1,136 @@
+# ==== CONSTANTS ====
+
+define OWNAS = 550002; # your autonomous system number
+
+# the first non-zero IPv4 you control. Since we're only using
+# IPv6. Use the first non-zero 32 bits you control. E.g., if
+# you control 255::/16, use 2.85.0.1 (255 is two hex bytes, 
+# 0x02, and 0x55 which is 2.85 in a v4 addr).
+define OWNIP = 2.85.0.1;
+
+# the router's actual IPv6 addr that it can be reached by.
+define OWNIPv6 = 255::1;
+
+# the subnet you control
+define OWNNETv6 = 255::/16;
+
+# set of all addrs you control.
+define OWNNETSETv6 = [255::/16+];
+
+# ===================
+
+router id OWNIP;
+
+# "everything" is a protocol in bird. The `device` protocol is not really
+# a protocol, it just instructs bird to ask the kernel for information
+# on devices (interfaces).
+protocol device {
+  # scan devices every 10 seconds.
+  scan time 10;
+}
+
+# ==== UTILITY FUNCTIONS ====
+
+function is_self_net() {
+  return net ~ OWNNETSETv6;
+}
+
+function is_valid_network() {
+  return net ~ [
+    0200::/7+
+  ];
+}
+
+# Tell bird how to interact with the kernel (modify routes):
+#
+# Again, not really a protocol but ¯\_(ツ)_/¯
+protocol kernel {
+  # scan the routing table every 20 seconds (update bird state).
+  scan time 20;
+  
+  # configure ipv6
+  ipv6 {
+    # Don't import any routes from the kernel, let bird figure out
+    # what routes to add or change. `none` is a "filter" that discards
+    # routes that are given to it. The kernel gives bird routes and we
+    # want bird to ignore them. kernel -> bird.
+    import none;
+  
+    # We write an inline filter that describes what routes to give the
+    # kernel from bird. bird -> kernel.
+    export filter {
+      # if the source of this route is static configuration, then we
+      # don't want to give it to the kernel. (only want dynamic routes).
+      # I don't know why this is important? Is that right?
+      if source = RTS_STATIC then reject;
+      # set the `krt_prefsrc` attribute for this route.
+      # see comment above above the kernel block.
+      krt_prefsrc = OWNIPv6;
+      # accept this route (don't filter it out).
+      accept;
+    };
+  };
+}
+
+# Static protocol lets you define static routes that do not change.
+protocol static {
+  # reject any routes in our subnet (I think?)
+  route OWNNETv6 reject;
+
+  ipv6 {
+    # tell bird about everything. static -> bird.
+    import all;
+    # bird can't configure static routes (default)?.
+    # bird -> static.
+    export none;
+  };
+}
+
+# Create a template for the `bgp` protocol. This is where the real
+# magic happens. We use a template since every peer will essentially
+# have the same BGP configuration. The template name is `alapeers`.
+#
+# Each peer gets its own template nad file under `peers6/*``.
+#
+# We're using BGP in "exterior" or `eBGP` mode. This means we're using
+# the protocol to define routes between Autonomous Systems, not really
+# between individual IP addrs.
+#
+# Each instance of the `bgp` protocol corresponds with one neighboring
+# router, or in our case, a peer.
+template bgp alapeers {
+  # our `as` number is the OWNAS constant. This is defined in the local
+  # defs file that comes later.
+  local as OWNAS;
+  # compare path lengths to determine which route is the best one.
+  path metric 1;
+  
+  ipv6 {
+    # only accept routes from peers that follow this inline filter.
+    # bgp -> bird.
+    import filter {
+      # Accept the route if its a valid network and is not our
+      # own network. (fns defined in local defs file).
+      if is_valid_network() && !is_self_net() then {
+        accept;
+      }
+      reject;
+    };
+    # only send routes that follow this inline filter.
+    # bird -> bgp (other peers).
+    export filter {
+      # Only send if it's a valid netowrk and the route comes from
+      # static configuration or from BGP.
+      if is_valid_network() && source ~ [RTS_STATIC, RTS_BGP] then {
+        accept;
+      }
+      reject;
+    };
+    # Only allow for 1000 total routes to be imported. Once we hit
+    # 1000, block further routes. 
+    import limit 1000 action block;
+  };
+}
+
+# Include all of our peers!
+include "peers/*";
@@ -0,0 +1,3 @@
+protocol bgp og_router_peer from alapeers {
+  neighbor 200::1 as 550001; # as == autonomous system
+}
@@ -10,7 +10,7 @@ with another router will come in an edit or separate post.
 # My Network

 I'm not trying to to any sort of dynamic routing yet, but here's what I have working right now. My current network is 
-the entire `0200::/7` address space (all addresses prefixed with `0x02` and `0x0[01]`).
+the entire `0200::/7` address space (all addresses prefixed with `0x0(2|3)`).

 ```
 ┌──────────┐    wg tunnel
@@ -88,6 +88,29 @@ in bird. Protocols describe how to interact with the kernel, BGP, static route,
 ## bird.conf

 ```
+# ==== CONSTANTS ====
+
+define OWNAS = <OWNAS>; # your autonomous system number
+
+# the first non-zero IPv4 you control. Since we're only using
+# IPv6. Use the first non-zero 32 bits you control. E.g., if
+# you control 255::/16, use 2.85.0.1 (255 is two hex bytes,
+# 0x02, and 0x55 which is 2.85 in a v4 addr).
+define OWNIP = <OWNIP>;
+
+# the router's actual IPv6 addr that it can be reached by.
+define OWNIPv6 = <OWNIPv6>;
+
+# the subnet you control
+define OWNNETv6 = <OWNNET>;
+
+# set of all addrs you control.
+define OWNNETSETv6 = [<OWNNET>+];
+
+# ===================
+
+router id OWNIP;
+
 # "everything" is a protocol in bird. The `device` protocol is not really
 # a protocol, it just instructs bird to ask the kernel for information
 # on devices (interfaces).
@@ -96,61 +119,61 @@ protocol device {
  scan time 10;
 }

-# Include our local configuration.
-#
-# We define our own AS and subnet in here along with some
-# helper functions for determining if a route is in our
-# own network. We'll cover this short file later.
-include "/etc/bird/local6.conf
+# ==== UTILITY FUNCTIONS ====
+
+function is_self_net() {
+  return net ~ OWNNETSETv6;
+}
+
+function is_valid_network() {
+  return net ~ [
+    0200::/7+
+  ];
+}

 # Tell bird how to interact with the kernel (modify routes):
 #
 # Again, not really a protocol but ¯\_(ツ)_/¯
-
-# Comment from dn42's guide:
-/*
-    krt_prefsrc defines the source address for outgoing connections.
-    On Linux, this causes the "src" attribute of a route to be set.
-
-    Without this option outgoing connections would use the peering IP which
-    would cause packet loss if some peering disconnects but the interface
-    is still available. (The route would still exist and thus route through
-    the TUN/TAP interface but the VPN daemon would simply drop the packet.)
-*/
 protocol kernel {
  # scan the routing table every 20 seconds (update bird state).
  scan time 20;
-  
-  # Don't import any routes from the kernel, let bird figure out
-  # what routes to add or change. `none` is a "filter" that discards
-  # routes that are given to it. The kernel gives bird routes and we
-  # want bird to ignore them. kernel -> bird.
-  import none;
-  
-  # We write an inline filter that describes what routes to give the
-  # kernel from bird. bird -> kernel.
-  export filter {
-    # if the source of this route is static configuration, then we
-    # don't want to give it to the kernel. (only want dynamic routes).
-    # I don't know why this is important? Is that right?
-    if source = RTS_STATIC then reject;
-    # set the `krt_prefsrc` attribute for this route.
-    # see comment above above the kernel block.
-    krt_prefsrc = OWNIP;
-    # accept this route (don't filter it out).
-    accept;
+
+  # configure ipv6
+  ipv6 {
+    # Don't import any routes from the kernel, let bird figure out
+    # what routes to add or change. `none` is a "filter" that discards
+    # routes that are given to it. The kernel gives bird routes and we
+    # want bird to ignore them. kernel -> bird.
+    import none;
+
+    # We write an inline filter that describes what routes to give the
+    # kernel from bird. bird -> kernel.
+    export filter {
+      # if the source of this route is static configuration, then we
+      # don't want to give it to the kernel. (only want dynamic routes).
+      # I don't know why this is important? Is that right?
+      if source = RTS_STATIC then reject;
+      # set the `krt_prefsrc` attribute for this route.
+      # see comment above above the kernel block.
+      krt_prefsrc = OWNIPv6;
+      # accept this route (don't filter it out).
+      accept;
+    };
  };
 }

 # Static protocol lets you define static routes that do not change.
 protocol static {
  # reject any routes in our subnet (I think?)
-  route <SUBNET> reject;
-  # tell bird about everything. static -> bird.
-  import all;
-  # bird can't configure static routes (default)?.
-  # bird -> static.
-  export none;
+  route OWNNETv6 reject;
+
+  ipv6 {
+    # tell bird about everything. static -> bird.
+    import all;
+    # bird can't configure static routes (default)?.
+    # bird -> static.
+    export none;
+  };
 }

 # Create a template for the `bgp` protocol. This is where the real
@@ -171,77 +194,39 @@ template bgp alapeers {
  local as OWNAS;
  # compare path lengths to determine which route is the best one.
  path metric 1;
-  
-  # remember rejected routes for later debugging. 
-  import keep filtered;
-  
-  # only accept routes from peers that follow this inline filter.
-  # bgp -> bird.
-  import filter {
-    # Accept the route if its a valid network and is not our
-    # own network. (fns defined in local defs file).
-    if is_valid_network() && !is_self_net() then {
-      accept;
-    }
-    reject;
+
+  ipv6 {
+    # only accept routes from peers that follow this inline filter.
+    # bgp -> bird.
+    import filter {
+      # Accept the route if its a valid network and is not our
+      # own network. (fns defined in local defs file).
+      if is_valid_network() && !is_self_net() then {
+        accept;
+      }
+      reject;
+    };
+    # only send routes that follow this inline filter.
+    # bird -> bgp (other peers).
+    export filter {
+      # Only send if it's a valid netowrk and the route comes from
+      # static configuration or from BGP.
+      if is_valid_network() && source ~ [RTS_STATIC, RTS_BGP] then {
+        accept;
+      }
+      reject;
+    };
+    # Only allow for 1000 total routes to be imported. Once we hit
+    # 1000, block further routes.
+    import limit 1000 action block;
  };
-  # only send routes that follow this inline filter.
-  # bird -> bgp (other peers).
-  export filter {
-    # Only send if it's a valid netowrk and the route comes from
-    # static configuration or from BGP.
-    if is_valid_network() && source ~ [RTS_STATIC, RTS_BGP] then {
-      accept;
-    }
-    reject;
-  };
-  
-  # Only allow for 1000 total routes to be imported. Once we hit
-  # 1000, block further routes. 
-  import limit 1000 action block;
 }

 # Include all of our peers!
-include "/etc/bird/peers6/*";
+include "peers/*";
 ```

-Whew, that was a rather larger file but that's pretty much it. Now for our local configuration and what a peer looks 
-like.
-
-## local6.conf
-
-```
-# Our globally unique identifier. Most people in dn42 us their internal router's ip.
-# I wonder if a UUID or something would work here?
-router id <GATEWAY_IP>;
-
-# Define our own Autonomous System Number here:
-define OWNAS = <AS>;
-
-# Define the router's ip:
-define OWNIP = <GATEWAY_IP>;
-
-# Now for some helper functions (filters) that we use in the config above:
-
-# Returns if the `net` special variable (what the route is actually 
-# talking about, could be prefix. generally some kind of address), 
-# is in our own subnet. The `+` after the subnet is shorthand for 
-# "every possible address in this subnet".
-#
-# `a ~ b` means "a is in b".
-function is_self_net() {
-  return net ~ [<SUBNET>+];
-}
-
-# We use this function to limit our routes to those that are in the alanet.
-function is_valid_network() {
-  return net ~ [
-    0200::/7+ # All address that start with 0200 are in our network.
-  ]
-}
-```
-
-That's it for the local configuration! Define some constants and two simple helper functions.
+Whew, that was a rather larger file but that's pretty much it. Now to configure a peer.

 ## peers/*.conf

@@ -270,4 +255,197 @@ something up.

 I need to determine a fake AS number, subnets, etc, and then I'll report back if it works or not. To test the bird 
 configuration, I plan to connect lykos to a different router running on a different subnet, and then ssh into hyperion 
-from lykos. The routes should "just work" (right lol).
+from lykos. The routes should "just work" (right lol).
+
+
+# (edit) Testing Bird with Two Routers
+
+I have two DO droplets that will run bird. Here's how I'm setting up the network.
+
+OG Router (OGR):
+- `AS`: AS550001
+- `router id`: 2.0.0.1
+- `GATEWAY_IP`: `0200::1`
+- `SUBNET`: `0200::/16`
+- Internal WG Interface: ohea0
+
+Test Router (TR):
+- `AS`: AS550002
+- `router id`: 2.85.0.1
+- `GATEWAY_IP`: `0255::1`
+- `SUBNET`: `0255::/16`
+- Internal WG Interface: alanet0
+
+I'm keeping hyperion connected to OGR with address `0200::3`. Lykos will connect to TR with address `0255::2`. I've 
+setup wireguard (wg) on my two clients, hyperion and lykos, to allow all IPs from `0200::/7`.
+
+Things started getting a little hairy here. `wg-quick` automatically sets up the routing table which interferes with 
+bird, so we need to disable it with `Table = off` in our WG configuration. I also enabled `PersistentKeepalive` with 
+my two routers in order to confirm that a tunnel could actually be created. Since I disabled the wg routing table, I 
+can't seem to ping one router from the other. I believe this is because there is nothing telling the kernel to route 
+arbitrary `200::/7` packets to the wg tunnel and from the wg tunnel to the router I'm trying to ping. I'm guessing bird
+will set this up for me when I add a peer.
+
+## Adding bird to each router
+
+I've put the configuration for both routers under the bird_conf dir. `ogr` for the OG Router, `tr` for the test 
+router, and `template` for the template files above.
+
+Updating a server conf:
+```
+rsync -a ogr/* router:.bird
+```
+
+### First Snag, the Router ID
+
+The `router id` in `local.conf` needs to be an IPv4 address (ugh). I'm just going to use my router's public ipv4 addr 
+and call it good.
+
+### Second Snag, Syntax
+
+Syntax errors everywhere.
+
+### Third Snag, wrong bird version
+
+FML. The guide from dn42 was for bird 1.6.3, and I'm running bird 2.0.10. dn42 has a [bird2 guide](https://dn42.eu/howto/Bird2)
+which I'm using to modify the configuration that I wrote about above. This has led to more syntax errors...
+
+Some of the errors have been rather helpful though!
+```
+bird: bird.conf:15:28 Invalid IPv6 prefix 200::1/16, maybe you wanted 200::/16
+```
+
+## Running bird
+
+After fixing those errors and changing the conf file, here's the command I'm using to run bird:
+```
+bird -d -c bird.conf
+```
+`-d` for debug messages and for running in the foreground and `-c` to point to my local config file, `.bird/bird.conf`.
+
+Apparently ubuntu has a `bird2` package that's bird version `2.0.9-3`. I'll attempt to use that for the test-router.
+
+I have bird running on both routers now. Now the _real_ debugging begins.
+
+# Further wg configuration
+
+After reading [dn42's guide on wireguard](https://dn42.eu/howto/wireguard) I believe we need tell the interface that 
+it's point-to-point and split up the config.
+
+Here's my wireguard setup for ogr:
+
+I now have two wireguard config files, `ohea0.conf` and `peer-tr.conf`. `ohea0.conf` has all of my configuration for my
+local devices and lets lykos ssh into hyperion through ogr. It's a standard wg configuration. The key here is that **I'm
+listening on port 50005**. `peer-tr.conf` is an interface just for peering with the `test-router`. I expect that wg 
+configuration to be copy-pasted for each peer, albeit with modified `ListenPort`s.
+
+Internal Network: `ohea0.conf`
+```
+[Interface]
+PrivateKey = (redacted)
+Address = 200::1/16
+ListenPort = 50005
+
+[Peer]
+PublicKey = ZKR6n8/IersOc1SKoUyU6Z3/q/jPeZs5ljf4hg04pA0=
+AllowedIPs = 0200::3/128
+```
+
+BGP Peer: `peer-tr.conf`
+```
+[Interface]
+PrivateKey = 
+# Different listen port for peers!
+ListenPort = 50004
+# Make this link a point-to-point connection.
+# Note ogr's ip 200::1 and the peer's (tr's) ip 255::1 
+PostUp = /sbin/ip addr add dev %i 200::1/128 peer 255::1/128
+# Don't modify any routes
+Table = off
+
+[Peer]
+PublicKey = C6RPH/RMqZ9u0ot6XN8ZcS+vTtU2zo9ZD7+wCfPzHxg=
+AllowedIPs = 0200::/7
+Endpoint = 46.101.144.104:50004
+PersistentKeepalive = 25
+```
+
+The config for `tr` is essentially the same, just flipping the ips and keys.
+
+`ogr` can now ping `tr` and we're now split on multiple interfaces.
+
+# Debugging BGP
+
+After making the peer wg config point-to-point, ogr's and tr's birds starting speaking BGP with eachother. I used the
+bird client `birdc` to see if anything changed. `birdc` connects to the currently running bird process over the control 
+socket created when bird starts.
+
+Run `show protocols` to get the list of configured protocols (blocks in the config file). Here's what ogr's protocols 
+look like:
+
+```
+bird> show protocols
+Name       Proto      Table      State  Since         Info
+device1    Device     ---        up     09:10:13.122
+kernel1    Kernel     master6    up     09:10:13.122
+static1    Static     master6    up     09:10:13.122
+peer_test_router BGP        ---        up     09:10:22.257  Established
+```
+
+And `show protocols peer_test_router` gives much more info on BGP that's running. I saw in that output that some routes
+were added/seen by bird.
+
+Here's `show route stats`:
+
+```
+bird> show route stats
+Table master4:
+0 of 0 routes for 0 networks in table master4
+
+Table master6:
+200::/16             unreachable [static1 09:10:13.122] * (200)
+255::/16             unicast [peer_test_router 09:10:23.124] * (100) [AS550002i]
+	via 255::1 on peer-tr
+2 of 2 routes for 2 networks in table master6
+
+Total: 2 of 2 routes for 2 networks in 2 tables
+```
+
+Seeing `255::/16` in there is promising, since that's the subnet that the `test-router` controls (comes from 
+AS550002).
+
+Let's try it out!
+
+# IT FUCKING WORKS
+
+I ssh'ed into `hyperion` FROM `lykos`! This is pretty fuckin cool. I feel like some sort of internet god.
+
+Here's my final topology:
+
+```
+┌───────────┐                ┌───────────┐
+│    ogr    │peer-tr         │    tr     │
+│ 200::1/16 ◄────────────────► 255::1/16 │
+│  AS55001  │        peer-ogr│  AS55002  │
+└────▲──────┘                └────▲──────┘
+     │                            │
+     │ohea0                alanet0│
+     │                            │
+     │                            │
+┌────▼─────┐                 ┌────▼───┐
+│ hyperion │                 │ lykos  │
+│  200::3  │                 │ 255::2 │
+└──────────┘                 └────────┘
+```
+
+So in order to ssh from lykos, tr needed to know that it could send `200::/16` packets to ogr. Remember that the wg link
+from tr <-> ogr is only point-to-point, there was no concept of a subnet. That means routing info for ogr must have been 
+set by bird in tr's routing table, which allowed the IP/TCP packets to be forwarded to hyperion.
+
+# Conclusion
+
+That was a grind. I think like 99% of it can be automated with a nice tool and config file, at least all of the bird 
+configuration. Auto configuring WG is also pretty doable.
+
+We still need to test this with multiple peers using an actual "network", but that's not too bad.
+