diff --git a/nixos/hosts/osaka-vultr-01/default.nix b/nixos/hosts/osaka-vultr-01/default.nix
index e7b1ca35..4da04d86 100644
--- a/nixos/hosts/osaka-vultr-01/default.nix
+++ b/nixos/hosts/osaka-vultr-01/default.nix
@@ -19,8 +19,7 @@
   time.timeZone = "Asia/Tokyo";
   networking.hostName = "osaka-vultr-01";
   
-  networking.firewall.allowedTCPPorts = [ 5120 22 ];
-  networking.firewall.allowedUDPPorts = [ 5120 ];
+  networking.firewall.allowedTCPPorts = [ 22 ];
 
   # Generic Tailscale configs are in /nixos/common/services/tailscale.nix  
   # Set up the secrets file: