Monitoring for a Telnet response?

Did you tried tcp monitoring? Backend service running on port 7171 is what http? web application that need any authentication?

Hi there, No this isn't a web service - this is a service running over the port that doesn't give a web response.

I suspect you may be able to create a TCP monitor that Sends a telnet command, and check the response for something that telnet would reply (string matching).

You say that the server doesn't normally send anything back to the client - do you mean it connects and then waits for the client to send something, and only then returns data ? If so, then you could use a telnet monitor to send a particular string and look for a particular reply.

 

If you only want to check whether the TCP three-way-handshake was successful, you can use a TCP monitor with no send or receive string specified. This will only test the 3WHS and nothing more.

 

You could also potentially use a TCP half-open monitor, which sends a SYN, and marks up if it gets a SYN+ACK in reply (if the port is closed, it gets a RST).