diff --git a/hosts/server/natsu/configuration.nix b/hosts/server/natsu/configuration.nix
index d113f49..89682ca 100644
--- a/hosts/server/natsu/configuration.nix
+++ b/hosts/server/natsu/configuration.nix
@@ -26,6 +26,9 @@
   users.users.imnyang.openssh.authorizedKeys.keys = [
     "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOHP3Z+AYrRh9f8TYyqChKfeyNm3lOe0F75AwRHTTaxD imnyang@kazusa"
     "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIrpjEYOBx7LTGb7QsPrmPBboqyTUNm/e+4+yqWruljv imnyang@natsu"
+
+    "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDNH9+KCZmlrkRsscGsDHLQJNUXW1km0aIr4gAnG8jpbI+LCgtdILd/aDOzNVM2MVJSRnn+USnf++QAFQxPNwkuG+PhJ+ZOwQnJpr27LFYDvtWh/c0IsBapmzPLkacmAc8D+CpBCLiK51OrlGtuV0etjfAj08BfTSGq2U9O7ksZohl/JHkRyIEZxRUnGqSA1oAkayByMUor9p2e1kSUCjO+S1u8CNphU+XBx+Fll49Y+rGjFYm3vEdznoDpz/Ho5lgndoOasGQqNGA+LWsp5Ap3e8xMsRIQy53HSwhY0kaWmaQYdovGBF5Eq7bgu5gdDXgq261gcArqteBCCgnrh8Fp jongyeol@furry"
+
   ];
 
   environment.systemPackages = with pkgs; [
@@ -72,12 +75,23 @@
   };
 
   networking.firewall.allowedTCPPorts = [
-    22
+    22 # default ssh port
+    3022 # alternative ssh port
+
     80
     443
     12345
   ];
 
+
+  services.openssh = {
+    ports = [
+      22
+      3022
+    ];
+  };
+
+
   networking.hostName = "natsu";
   system.stateVersion = "26.05";
 }