diff --git a/krebs/3modules/default.nix b/krebs/3modules/default.nix
index 2772bf986..bd6bab376 100644
--- a/krebs/3modules/default.nix
+++ b/krebs/3modules/default.nix
@@ -109,7 +109,6 @@ let
     {
       krebs.dns.providers = {
         "krebsco.de" = "zones";
-        gg23 = "hosts";
         shack = "hosts";
         i = "hosts";
         r = "hosts";
@@ -153,9 +152,11 @@ let
                     let
                       longs = net.aliases;
                       shorts =
-                        map (removeSuffix ".${cfg.dns.search-domain}")
-                            (filter (hasSuffix ".${cfg.dns.search-domain}")
-                                    longs);
+                        optionals
+                          (cfg.dns.search-domain != null)
+                          (map (removeSuffix ".${cfg.dns.search-domain}")
+                               (filter (hasSuffix ".${cfg.dns.search-domain}")
+                                       longs));
                       add-port = a:
                         if net.ssh.port != 22
                           then "[${a}]:${toString net.ssh.port}"
@@ -178,7 +179,8 @@ let
           (concatMap (host: attrValues host.nets)
             (mapAttrsToList
               (_: host: recursiveUpdate host
-                (optionalAttrs (hasAttr cfg.dns.search-domain host.nets) {
+                (optionalAttrs (cfg.dns.search-domain != null &&
+                                hasAttr cfg.dns.search-domain host.nets) {
                   nets."" = host.nets.${cfg.dns.search-domain} // {
                     aliases = [host.name];
                     addrs = [];
diff --git a/krebs/3modules/dns.nix b/krebs/3modules/dns.nix
index b7e2a2cbb..8acc4ccd8 100644
--- a/krebs/3modules/dns.nix
+++ b/krebs/3modules/dns.nix
@@ -6,7 +6,7 @@ with import <stockholm/lib>;
     };
 
     krebs.dns.search-domain = mkOption {
-      type = types.hostname;
+      type = types.nullOr types.hostname;
     };
   };
 }
diff --git a/krebs/3modules/hosts.nix b/krebs/3modules/hosts.nix
index 7fe01a769..159b54e34 100644
--- a/krebs/3modules/hosts.nix
+++ b/krebs/3modules/hosts.nix
@@ -24,7 +24,11 @@ in {
                   aliases = longs ++ shorts;
                   longs = filter check net.aliases;
                   shorts = let s = ".${config.krebs.dns.search-domain}"; in
-                    map (removeSuffix s) (filter (hasSuffix s) longs);
+                    optionals
+                      (config.krebs.dns.search-domain != null)
+                      (map (removeSuffix s)
+                           (filter (hasSuffix s)
+                                   longs));
                 in
                   map (addr: { ${addr} = aliases; }) net.addrs)
                 (attrValues host.nets))
diff --git a/krebs/3modules/tv/default.nix b/krebs/3modules/tv/default.nix
index a20801b12..c2bf406f1 100644
--- a/krebs/3modules/tv/default.nix
+++ b/krebs/3modules/tv/default.nix
@@ -131,11 +131,6 @@ in {
       ci = true;
       cores = 2;
       nets = {
-        gg23 = {
-          ip4.addr = "10.23.1.110";
-          aliases = ["nomic.gg23"];
-          ssh.port = 11423;
-        };
         retiolum = {
           ip4.addr = "10.243.0.110";
           aliases = [
@@ -158,27 +153,10 @@ in {
       ssh.privkey.path = <secrets/ssh.id_ed25519>;
       ssh.pubkey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMIHmwXHV7E9UGuk4voVCADjlLkyygqNw054jvrsPn5t root@nomic";
     };
-    ok = {
-      external = true;
-      nets = {
-        gg23 = {
-          ip4.addr = "10.23.1.1";
-          aliases = ["ok.gg23"];
-        };
-      };
-    };
     wu = {
       ci = true;
       cores = 4;
       nets = {
-        gg23 = {
-          ip4.addr = "10.23.1.37";
-          aliases = [
-            "wu.gg23"
-            "cache.wu.gg23"
-          ];
-          ssh.port = 11423;
-        };
         retiolum = {
           ip4.addr = "10.243.13.37";
           aliases = [
@@ -237,14 +215,6 @@ in {
       ci = true;
       cores = 4;
       nets = {
-        gg23 = {
-          ip4.addr = "10.23.1.38";
-          aliases = [
-            "xu.gg23"
-            "cache.xu.gg23"
-          ];
-          ssh.port = 11423;
-        };
         retiolum = {
           ip4.addr = "10.243.13.38";
           aliases = [
@@ -272,13 +242,6 @@ in {
       ci = true;
       cores = 4;
       nets = {
-        gg23 = {
-          ip4.addr = "10.23.1.39";
-          aliases = [
-            "zu.gg23"
-          ];
-          ssh.port = 11423;
-        };
         retiolum = {
           ip4.addr = "10.243.13.40";
           aliases = [
diff --git a/tv/2configs/binary-cache/default.nix b/tv/2configs/binary-cache/default.nix
index 866434cb5..f6eaba36f 100644
--- a/tv/2configs/binary-cache/default.nix
+++ b/tv/2configs/binary-cache/default.nix
@@ -27,7 +27,7 @@
     enable = true;
     virtualHosts.nix-serve = {
       serverAliases = [
-        "cache.${config.krebs.build.host.name}.gg23"
+        "cache.${config.krebs.build.host.name}.hkw"
       ];
       locations."/".extraConfig = ''
         proxy_pass http://localhost:${toString config.services.nix-serve.port};
diff --git a/tv/2configs/default.nix b/tv/2configs/default.nix
index 4d27b0eac..9db35184a 100644
--- a/tv/2configs/default.nix
+++ b/tv/2configs/default.nix
@@ -16,6 +16,7 @@ with import <stockholm/lib>;
     ./backup.nix
     ./bash
     ./htop.nix
+    ./nets/hkw.nix
     ./nginx
     ./pki
     ./ssh.nix
diff --git a/tv/2configs/nets/hkw.nix b/tv/2configs/nets/hkw.nix
new file mode 100644
index 000000000..725e63b13
--- /dev/null
+++ b/tv/2configs/nets/hkw.nix
@@ -0,0 +1,69 @@
+{
+  krebs = {
+    dns.providers.hkw = "hosts";
+    hosts = {
+      nomic = {
+        nets.hkw = {
+          ip4 = {
+            addr = "10.23.1.110";
+            prefix = "10.23.1.0/24";
+          };
+          aliases = [
+            "nomic.hkw"
+          ];
+          ssh.port = 11423;
+        };
+      };
+      ok = {
+        external = true;
+        nets.hkw = {
+          ip4 = {
+            addr = "10.23.1.1";
+            prefix = "10.23.1.0/24";
+          };
+          aliases = [
+            "ok.hkw"
+          ];
+        };
+      };
+      wu = {
+        nets.hkw = {
+          ip4 = {
+            addr = "10.23.1.37";
+            prefix = "10.23.1.0/24";
+          };
+          aliases = [
+            "wu.hkw"
+            "cache.wu.hkw"
+          ];
+          ssh.port = 11423;
+        };
+      };
+      xu = {
+        nets.hkw = {
+          ip4 = {
+            addr = "10.23.1.38";
+            prefix = "10.23.1.0/24";
+          };
+          aliases = [
+            "xu.hkw"
+            "cache.xu.hkw"
+          ];
+          ssh.port = 11423;
+        };
+      };
+      zu = {
+        nets.hkw = {
+          ip4 = {
+            addr = "10.23.1.39";
+            prefix = "10.23.1.0/24";
+          };
+          aliases = [
+            "zu.hkw"
+          ];
+          ssh.port = 11423;
+        };
+      };
+    };
+  };
+}
diff --git a/tv/2configs/nginx/public_html.nix b/tv/2configs/nginx/public_html.nix
index cc7a39891..a37498ba3 100644
--- a/tv/2configs/nginx/public_html.nix
+++ b/tv/2configs/nginx/public_html.nix
@@ -9,7 +9,7 @@ with import <stockholm/lib>;
       serverAliases = [
         "localhost"
         "${config.krebs.build.host.name}"
-        "${config.krebs.build.host.name}.gg23"
+        "${config.krebs.build.host.name}.hkw"
         "${config.krebs.build.host.name}.r"
       ];
       locations."~ ^/~(.+?)(/.*)?\$".extraConfig = ''