1 files changed, 54 insertions, 0 deletions
diff --git a/modules/nixos/server/openssh/default.nix b/modules/nixos/server/openssh/default.nix
new file mode 100644
index 0000000..675ceaf
--- /dev/null
+++ b/modules/nixos/server/openssh/default.nix
@@ -0,0 +1,54 @@
+{
+  config,
+  lib,
+  ...
+}:
+
+let
+  inherit (lib) mkEnableOption mkOption types mkIf;
+  cfg = config.nx.server.openssh;
+in
+{
+  options.nx.server.openssh = {
+    enable = mkEnableOption "OpenSSH server";
+    port = mkOption {
+      description = "Port for openssh";
+      type = types.port;
+      default = 8693;
+    };
+    allowedUsers = mkOption {
+      description = "Users allowed to SSH";
+      type = types.listOf types.str;
+      default = [ ];
+    };
+  };
+
+  config = mkIf cfg.enable {
+    services.openssh = {
+      enable = true;
+      ports = [ cfg.port ];
+      settings = {
+        PasswordAuthentication = false;
+        AllowUsers = cfg.allowedUsers;
+        X11Forwarding = false;
+        PermitRootLogin = "yes";
+      };
+    };
+    networking.firewall.allowedTCPPorts = [ cfg.port ];
+
+    services.fail2ban = {
+      jails = {
+        sshd = {
+          enabled = true;
+          settings = {
+            port = 8693;
+            backend = "systemd";
+            maxretry = 4;
+            findtime = "10m";
+            bantime = "1h";
+          };
+        };
+      };
+    };
+  };
+}