diff --git a/hosts/lilac/default.nix b/hosts/lilac/default.nix
index 9c55fca..23a9e9a 100644
--- a/hosts/lilac/default.nix
+++ b/hosts/lilac/default.nix
@@ -17,4 +17,13 @@
   environment.systemPackages = with pkgs; [
     framework-tool
   ];
+
+  boot.kernelModules = [ "thunderbolt-net" ];
+
+  networking.interfaces.thunderbolt0.ipv4.addresses = [{
+    address = "10.0.0.1";
+    prefixLength = 24;
+  }];
+
+  networking.firewall.interfaces."thunderbolt0".allowedUDPPorts = [ 4242 ];
 }
diff --git a/hosts/violet/default.nix b/hosts/violet/default.nix
index 53e51e9..ec00e55 100644
--- a/hosts/violet/default.nix
+++ b/hosts/violet/default.nix
@@ -12,4 +12,13 @@
   services.power-profiles-daemon.enable = false;
 
   system.stateVersion = "26.05";
+
+  boot.kernelModules = [ "thunderbolt-net" ];
+
+  networking.interfaces.thunderbolt0.ipv4.addresses = [{
+    address = "10.0.0.1";
+    prefixLength = 24;
+  }];
+
+  networking.firewall.interfaces."thunderbolt0".allowedUDPPorts = [ 4242 ];
 }