Don't blindly trust as211024

lib/constants.nix

@@ -281,6 +281,25 @@ rec {
     };
   };
 
+  as211024 = rec {
+    trusted = {
+      v4 = [
+        colony.prefixes.all.v4
+        home.prefixes.all.v4
+        tailscale.prefix.v4
+      ];
+      v6 = [
+        colony.prefixes.all.v6
+        home.prefixes.all.v6
+        tailscale.prefix.v6
+      ];
+    };
+    nftTrust = ''
+      iifname as211024 ip saddr { ${concatStringsSep ", " trusted.v4} } accept
+      iifname as211024 ip6 saddr { ${concatStringsSep ", " trusted.v6} } accept
+    '';
+  };
+
   kelder = {
     groups = {
       storage = 2000;

nixos/boxes/britway/default.nix

@@ -150,8 +150,14 @@ in
               };
 
               firewall = {
-                trustedInterfaces = [ "as211024" "tailscale0" ];
+                trustedInterfaces = [ "tailscale0" ];
                 extraRules = ''
+                  table inet filter {
+                    chain forward {
+                      ${lib.my.as211024.nftTrust}
+                      oifname as211024 accept
+                    }
+                  }
                   table inet nat {
                     chain postrouting {
                       iifname tailscale0 oifname veth0 snat ip to ${assignments.vultr.ipv4.address}

nixos/boxes/colony/vms/estuary/bgp.nix

@@ -27,7 +27,9 @@ in
           define HOMENET6 = ${homenet6};
 
           define OWNIP6 = ${assignments.base.ipv6.address};
-          define OWNNETSET6 = [ ${intnet6}, ${amsnet6}, ${homenet6} ];
+          # we have issues with sending ICMPv6 too big back on the wrong interface right now...
+          define OWNNETSET6 = [ ${intnet6}, ${amsnet6} ];
+          define CCNETSET6 = [ ];
           #define TRANSSET6 = [ ::1/128 ];
 
           define DUB1IP6 = ${lib.my.c.home.vips.as211024.v6};
@@ -42,7 +44,7 @@ in
             if net ~ OWNNETSET4 || net ~ OWNNETSET6 then accept; else reject;
           }
           filter bgp_export_cc {
-            if net ~ OWNNETSET4 || net ~ OWNNETSET6 || net ~ CCNETSET4 then accept; else reject;
+            if net ~ OWNNETSET4 || net ~ OWNNETSET6 || net ~ CCNETSET4 || net ~ CCNETSET6 then accept; else reject;
           }
 
           router id from "wan";
@@ -188,10 +190,12 @@ in
           protocol bgp upstream6_coloclue_eun2 from upstream_bgp6 {
             description "ColoClue euNetworks 2 (IPv6)";
             neighbor 2a02:898:0:20::e2 as 8283;
+            ipv6 { export filter bgp_export_cc; };
           }
           protocol bgp upstream6_coloclue_eun3 from upstream_bgp6 {
             description "ColoClue euNetworks 3 (IPv6)";
             neighbor 2a02:898:0:20::e1 as 8283;
+            ipv6 { export filter bgp_export_cc; };
           }
 
           protocol bgp upstream6_ifog from upstream_bgp6 {

nixos/boxes/colony/vms/estuary/default.nix

@@ -366,7 +366,6 @@ in
                 };
               };
               firewall = {
-                trustedInterfaces = [ "as211024" ];
                 udp.allowed = [ 5353 lib.my.c.kelder.vpn.port ];
                 tcp.allowed = [ 5353 "bgp" ];
                 nat = {
@@ -416,7 +415,8 @@ in
                     }
 
                     chain forward {
-                      iifname { wan, $ixps } oifname base jump filter-routing
+                      ${lib.my.c.as211024.nftTrust}
+                      iifname { wan, as211024, $ixps } oifname base jump filter-routing
                       oifname $ixps jump ixp
                       iifname base oifname { base, wan, $ixps } accept
                       oifname { as211024, kelder } accept

nixos/boxes/home/routing-common/default.nix

@@ -311,14 +311,18 @@ in
               };
             };
             firewall = {
-              trustedInterfaces = [ "lan-hi" "lan-lo" "as211024" ];
+              trustedInterfaces = [ "lan-hi" "lan-lo" ];
               udp.allowed = [ 5353 ];
               tcp.allowed = [ 5353 ];
               nat = {
                 enable = true;
                 externalInterface = "wan";
               };
-              extraRules = ''
+              extraRules =
+              let
+                aa = allAssignments;
+              in
+              ''
                 table inet filter {
                   chain input {
                     iifname base meta l4proto { udp, tcp } th dport domain accept
@@ -326,8 +330,16 @@ in
                   }
 
                   chain routing-tcp {
-                    # Safe enough to allow all SSH
-                    tcp dport ssh accept
+                    ip daddr {
+                      ${aa.castle.hi.ipv4.address},
+                      ${aa.cellar.hi.ipv4.address},
+                      ${aa.palace.hi.ipv4.address}
+                    } tcp dport ssh accept
+                    ip6 daddr {
+                      ${aa.castle.hi.ipv6.address},
+                      ${aa.cellar.hi.ipv6.address},
+                      ${aa.palace.hi.ipv6.address}
+                    } tcp dport ssh accept
 
                     return
                   }
@@ -346,8 +358,10 @@ in
                   }
 
                   chain forward {
+                    ${lib.my.c.as211024.nftTrust}
                     iifname lan-untrusted jump filter-untrusted
-                    iifname { wan, lan-untrusted } oifname { lan-hi, lan-lo } jump filter-routing
+                    iifname { wan, as211024, lan-untrusted } oifname { lan-hi, lan-lo } jump filter-routing
+                    oifname as211024 accept
                   }
                   chain output { }
                 }