formatting: new formatting'

common/nixos/ssh/ssh_guard.nix

@@ -0,0 +1,21 @@
+{
+  config,
+  lib,
+  ...
+}: {
+  options = {
+    ssh_guard.enable = lib.mkEnableOption "enable ssh guard";
+  };
+  config = lib.mkIf config.ssh_guard.enable {
+    services.sshguard = {
+      enable = true;
+      services = [
+        "sshd"
+      ];
+      blocktime = 120;
+      detection_time = 1800;
+      blacklist_threshold = 120;
+      blacklist_file = "/var/lib/sshguard/blacklist.db";
+    };
+  };
+}