diff --git a/nixos/lab.nix b/nixos/lab.nix
index f883a58..310b4fe 100644
--- a/nixos/lab.nix
+++ b/nixos/lab.nix
@@ -2,6 +2,7 @@
   lab.networking = {
     publicIPv4 = "192.145.57.90";
     dockerSwarmInternalIPv4 = "192.168.30.8";
+    dockerSwarmIPv6 = "2a0d:6e00:1a77:30:c8fe:c0ff:feff:ee08";
     dmzRouterIPv4 = "192.168.30.1";
     dmzServicesIPv4 = "192.168.30.7";
     # TODO: configure prefix length as well
diff --git a/nixos/modules/default.nix b/nixos/modules/default.nix
index 58ff038..623e356 100644
--- a/nixos/modules/default.nix
+++ b/nixos/modules/default.nix
@@ -1,6 +1,6 @@
 { lib, config, ... }:
 
-let cfg = config.lab.dataHost;
+let cfg = config.lab;
 in
 {
   imports = [
@@ -23,7 +23,7 @@ in
     '';
   };
 
-  config.lab = lib.mkIf cfg.enable {
+  config.lab = lib.mkIf cfg.dataHost.enable {
     backups.enable = true;
     data-sharing.enable = true;
     networking.allowDMZConnectivity = true;
diff --git a/nixos/modules/networking/default.nix b/nixos/modules/networking/default.nix
index 90b9730..eb5d409 100644
--- a/nixos/modules/networking/default.nix
+++ b/nixos/modules/networking/default.nix
@@ -42,6 +42,13 @@ in {
       '';
     };
 
+    dockerSwarmIPv6 = lib.mkOption {
+      type = lib.types.str;
+      description = ''
+        Globally routable IPv6 address of the Docker Swarm.
+      '';
+    };
+
     dmzRouterIPv4 = lib.mkOption {
       type = lib.types.str;
       description = ''
@@ -141,7 +148,7 @@ in {
           networkConfig = {
             IPv6AcceptRA = cfg.allowDMZConnectivity;
             LinkLocalAddressing = if cfg.allowDMZConnectivity then "ipv6" else "no";
-            DHCP = lib.mkIf (cfg.allowDMZConnectivity && cfg.staticDMZIPv4Address != "") "yes";
+            DHCP = lib.mkIf (cfg.allowDMZConnectivity && cfg.staticDMZIPv4Address == "") "yes";
             Address = lib.lists.optional (cfg.staticDMZIPv4Address != "") cfg.staticDMZIPv4Address
               ++ lib.lists.optional (cfg.staticDMZIPv6Address != "") cfg.staticDMZIPv6Address;
           };
diff --git a/nixos/modules/networking/dmz/zones/geokunis2.nl.nix b/nixos/modules/networking/dmz/zones/geokunis2.nl.nix
index 901592c..b56974b 100644
--- a/nixos/modules/networking/dmz/zones/geokunis2.nl.nix
+++ b/nixos/modules/networking/dmz/zones/geokunis2.nl.nix
@@ -1,7 +1,7 @@
 { config, dns, ... }:
 with dns.lib.combinators;
 let
-  inherit (config.lab.networking) publicIPv4 dmzServicesIPv6;
+  inherit (config.lab.networking) publicIPv4 dmzServicesIPv6 dockerSwarmIPv6;
 in
 {
   SOA = {
@@ -20,11 +20,14 @@ in
   MX = [ (mx.mx 10 "mail.geokunis2.nl.") ];
 
   A = [ publicIPv4 ];
-  AAAA = [ dmzServicesIPv6 ];
+  AAAA = [ dockerSwarmIPv6 ];
   CAA = letsEncrypt "caa@geokunis2.nl";
 
   subdomains = {
-    "*".A = [ publicIPv4 ];
+    "*" = {
+      A = [ publicIPv4 ];
+      AAAA = [ dockerSwarmIPv6 ];
+    };
 
     ns = {
       A = [ publicIPv4 ];
diff --git a/nixos/modules/networking/dmz/zones/kun.is.nix b/nixos/modules/networking/dmz/zones/kun.is.nix
index 6e7742b..c4cafb8 100644
--- a/nixos/modules/networking/dmz/zones/kun.is.nix
+++ b/nixos/modules/networking/dmz/zones/kun.is.nix
@@ -1,7 +1,7 @@
 { config, dns, ... }:
 with dns.lib.combinators;
 let
-  inherit (config.lab.networking) publicIPv4 dmzServicesIPv6;
+  inherit (config.lab.networking) publicIPv4 dmzServicesIPv6 dockerSwarmIPv6;
 in
 {
   CAA = letsEncrypt "caa@kun.is";
@@ -22,7 +22,10 @@ in
   ];
 
   subdomains = {
-    "*".A = [ publicIPv4 ];
+    "*" = {
+      A = [ publicIPv4 ];
+      AAAA = [ dockerSwarmIPv6 ];
+    };
 
     ns = {
       A = [ publicIPv4 ];