diff --git a/machines/kat-probook/default.nix b/machines/kat-probook/default.nix
index 11e8ad5..f8b9d93 100644
--- a/machines/kat-probook/default.nix
+++ b/machines/kat-probook/default.nix
@@ -51,7 +51,6 @@
     git
     btop
     ranger
-    colmena
     tree
     lazygit
     nix-output-monitor
diff --git a/machines/kat-probook/router.nix b/machines/kat-probook/router.nix
index ed97725..683aa5a 100644
--- a/machines/kat-probook/router.nix
+++ b/machines/kat-probook/router.nix
@@ -10,28 +10,36 @@
   systemd.network = {
     enable = true;
     networks = {
-      "uplink" = {
-        name = "wlp0s20f3";
-        DHCP = "ipv4";
-        networkConfig.IPMasquerade = "ipv4";
-      };
+      # "uplink" = {
+      #   name = "wlp0s20f3";
+      #   DHCP = "ipv4";
+      #   networkConfig.IPMasquerade = "ipv4";
+      # };
       "10-enp2s0" = {
         name = "enp2s0";
         address = [ "192.168.2.1/24" ];
         networkConfig.DHCPServer = "yes";
-        #  dhcpServerConfig = {
-        #    PoolOffset = 100;
-        #    PoolSize = 100;
-        #    BootServerAddress = "192.168.222.1";
-        #  };
+        dhcpServerConfig = {
+          PoolOffset = 100;
+          PoolSize = 100;
+        };
       };
     };
   };
 
-  networking.nat = {
-    enable = true;
-    internalInterfaces = [ "enp2s0" ];
-    externalInterface = "wlp0s20f3";
+  networking = {
+    nftables = {
+      enable = true;
+      tables.nat = {
+        family = "ip";
+        content = ''
+          chain postrouting {
+            type nat hook postrouting priority 100;
+            ip saddr 192.168.2.0/24 masquerade
+          }
+        '';
+      };
+    };
+    firewall.allowedUDPPorts = [ 67 ];
   };
-  networking.firewall.allowedUDPPorts = [ 67 ];
 }
diff --git a/shell.nix b/shell.nix
index 2bc598c..821bdac 100644
--- a/shell.nix
+++ b/shell.nix
@@ -2,4 +2,4 @@ let
   sources = import ./npins;
   pkgs = import sources.nixpkgs { };
 in
-pkgs.mkShell { packages = with pkgs; [ npins ]; }
+pkgs.mkShell { packages = with pkgs; [ npins colmena ]; }