Add system modules

modules/system/openssh.nix

@@ -0,0 +1,30 @@
+{ config, pkgs, ... }: {
+  services.openssh = {
+    enable = true;
+		ports = [ 6969 ];
+		settings = {
+			PasswordAuthentication = false;
+			PermitEmptyPasswords = false;
+			KbdInteractiveAuthentication = false;
+      PermitRootLogin = "no";
+      PubkeyAuthentication = true;
+		};
+	};
+
+  services.fail2ban = { 
+		enable = true;
+		maxretry = 3;
+		bantime = "48h";
+	};
+
+	services.endlessh = {
+		enable = true;
+		port = 22;
+    openFirewall = true;
+  };
+
+	systemd.services.endlessh = {
+		wantedBy = [ "multi-user.target" ];
+		after = [ "network.target" ];
+	};
+}