Exec command when invalid password was entered

defaults/config.js

@@ -10,6 +10,16 @@ module.exports = {
 	//
 	public: true,
 
+	//
+	// Exec command when invalid password was entered.
+	// Keyword {user} will be replaced with login name.
+	// Use it to report bad login attempts.
+	//
+	// @type     string
+	// @default  ""
+	//
+	authErrorCmd: "",
+
 	//
 	// Allow connections from this host.
 	//

src/server.js

@@ -162,6 +162,10 @@ function auth(data) {
 			}
 		});
 		if (!success) {
+			if (data.user !== undefined && config.authErrorCmd) {
+				var error_cmd = require("child_process");
+				error_cmd.execSync(config.authErrorCmd.replace(/\{user}/g, data.user));
+			}
 			socket.emit("auth");
 		}
 	}