diff --git a/hosts/gitea/default.nix b/hosts/gitea/default.nix
index dff1a079..1dd86955 100644
--- a/hosts/gitea/default.nix
+++ b/hosts/gitea/default.nix
@@ -1,4 +1,4 @@
-{ config, pkgs, lib, ... }:
+{ config, pkgs, lib, zentralwerk, ... }:
 
 {
   c3d2 = {
@@ -12,9 +12,9 @@
 
   networking = {
     hostName = "gitea";
-    hosts = {
-      "2a00:8180:2c00:282::48" = [ "auth.c3d2.de" ];
-      "172.20.73.72" = [ "auth.c3d2.de" ];
+    hosts = with zentralwerk.lib.config.site.net.serv; {
+      ${hosts6.up4.auth} = [ "auth.c3d2.de" ];
+      ${hosts4.auth} = [ "auth.c3d2.de" ];
     };
     firewall.allowedTCPPorts = [ 80 443 2222 ];
   };
diff --git a/hosts/hedgedoc/default.nix b/hosts/hedgedoc/default.nix
index c0c7fa30..74525e36 100644
--- a/hosts/hedgedoc/default.nix
+++ b/hosts/hedgedoc/default.nix
@@ -1,4 +1,4 @@
-{ config, pkgs, ... }:
+{ config, pkgs, zentralwerk, ... }:
 
 {
   c3d2 = {
@@ -18,9 +18,9 @@
 
   networking = {
     hostName = "hedgedoc";
-    hosts = {
-      "2a00:8180:2c00:282::48" = [ "auth.c3d2.de" ];
-      "172.20.73.72" = [ "auth.c3d2.de" ];
+    hosts = with zentralwerk.lib.config.site.net.serv; {
+      ${hosts6.up4.auth} = [ "auth.c3d2.de" ];
+      ${hosts4.auth} = [ "auth.c3d2.de" ];
     };
     firewall.allowedTCPPorts = [ 80 443 ];
   };