diff --git a/nixbld-etc-nixos/configuration.nix b/nixbld-etc-nixos/configuration.nix
index 07c244e..ae7d89f 100644
--- a/nixbld-etc-nixos/configuration.nix
+++ b/nixbld-etc-nixos/configuration.nix
@@ -92,7 +92,7 @@ in
     firewall = {
       allowedTCPPorts = [ 53 80 443 2222 7402 ];
       allowedUDPPorts = [ 53 67 500 4500 ];
-      trustedInterfaces = [ netifLan ];
+      trustedInterfaces = [ netifLan netifUSA ];
       logRefusedConnections = false;
       extraCommands = ''
         iptables -A INPUT -s 5.78.86.156 -p gre -j ACCEPT
@@ -260,29 +260,6 @@ in
         }
       ];
     };
-    greTunnels.intl0 = {
-      dev = netifWan;
-      remote = "5.78.86.156";
-      local = "94.190.212.123";
-      ttl = 255;
-      type = "tun";
-    };
-    interfaces.intl0 = {
-      ipv4.addresses = [
-        {
-          address = "10.47.3.1";
-          prefixLength = 31;
-        }
-      ];
-      ipv4.routes = [
-        {
-          address = "0.0.0.0";
-          prefixLength = 0;
-          via = "10.47.3.0";
-          options.table = "3";
-        }
-      ];
-    };
     vlans = {
       "${netifAltVlan}" = {
         id = 2;
@@ -351,27 +328,6 @@ in
       start_action = "start";
     };
   };
-  services.strongswan-swanctl.swanctl.connections.intl = {
-    local_addrs = [ "94.190.212.123" ];
-    remote_addrs = [ "5.78.86.156" ];
-    local.main = {
-      auth = "pubkey";
-      id = "fqdn:m-labs.hk";
-      pubkeys = [ "/etc/swanctl/pubkey/m-labs.hk" ];
-    };
-    remote.main = {
-      auth = "pubkey";
-      id = "fqdn:m-labs-intl.com";
-      pubkeys = [ "/etc/swanctl/pubkey/m-labs-intl.com" ];
-    };
-    children.intl0 = {
-      mode = "transport";
-      ah_proposals = [ "sha256-curve25519" ];
-      remote_ts = [ "5.78.86.156[gre]" ];
-      local_ts = [ "94.190.212.123[gre]" ];
-      start_action = "start";
-    };
-  };
 
   systemd.services.network-custom-route-backup = {
     wantedBy = [ "network.target" ];
@@ -400,15 +356,6 @@ in
       ExecStop = "${pkgs.iproute2}/bin/ip rule del table 1";
     };
   };
-  systemd.services.network-custom-route-intl = {
-    wantedBy = [ "network.target" ];
-    serviceConfig = {
-      Type = "oneshot";
-      RemainAfterExit = true;
-      ExecStart = "${pkgs.iproute2}/bin/ip rule add from 10.47.3.0/31 table 3";
-      ExecStop = "${pkgs.iproute2}/bin/ip rule del table 3";
-    };
-  };
 
   # https://kb.isc.org/docs/dnssec-key-and-signing-policy
   # chown named.named /etc/nixos/named