diff --git a/nixos/modules/programs/winbox.nix b/nixos/modules/programs/winbox.nix
index 78639f8d3ab9..62f010259754 100644
--- a/nixos/modules/programs/winbox.nix
+++ b/nixos/modules/programs/winbox.nix
@@ -25,7 +25,10 @@ in
   config = lib.mkIf cfg.enable {
     environment.systemPackages = [ cfg.package ];
     networking.firewall = lib.mkIf cfg.openFirewall {
-      allowedUDPPorts = [ 5678 ];
+      allowedUDPPorts = [
+        5678
+        20561
+      ];
       allowedUDPPortRanges = [
         {
           from = 40000;