diff --git a/hosts/ward/net.nix b/hosts/ward/net.nix
index 1d9d4f8..f40333c 100644
--- a/hosts/ward/net.nix
+++ b/hosts/ward/net.nix
@@ -110,7 +110,7 @@
       # Provide a DNS resolver
       ipv6SendRAConfig = {
         EmitDNS = true;
-        DNS = globals.net.home-lan.hosts.ward-adguardhome.ipv4;
+        DNS = globals.net.home-lan.hosts.ward-adguardhome.ipv6;
       };
       linkConfig.RequiredForOnline = "routable";
     };
diff --git a/modules/globals.nix b/modules/globals.nix
index 21e6f50..325491e 100644
--- a/modules/globals.nix
+++ b/modules/globals.nix
@@ -38,7 +38,7 @@ in {
                       };
 
                       ipv4 = mkOption {
-                        type = types.net.ipv4;
+                        type = types.nullOr types.net.ipv4;
                         description = "The IPv4 of this host";
                         readOnly = true;
                         default =
@@ -48,7 +48,7 @@ in {
                       };
 
                       ipv6 = mkOption {
-                        type = types.net.ipv6;
+                        type = types.nullOr types.net.ipv6;
                         description = "The IPv6 of this host";
                         readOnly = true;
                         default =
@@ -58,7 +58,7 @@ in {
                       };
 
                       cidrv4 = mkOption {
-                        type = types.net.cidrv4;
+                        type = types.nullOr types.str; # FIXME: this is not types.net.cidr because it would zero out the host part
                         description = "The IPv4 of this host including CIDR mask";
                         readOnly = true;
                         default =
@@ -68,7 +68,7 @@ in {
                       };
 
                       cidrv6 = mkOption {
-                        type = types.net.cidrv6;
+                        type = types.nullOr types.str; # FIXME: this is not types.net.cidr because it would zero out the host part
                         description = "The IPv6 of this host including CIDR mask";
                         readOnly = true;
                         default =