When using HTTP or HTTPS, with or without the Relay Server, you can use a web browser to verify MobiLink server is listening for requests. For example, if your MobiLink server command line is as follows:

mlsrv16 ... -x http(port=8080)

and the computer is ml1.mycorp.com, then you can open a web browser and point it to http://ml1.mycorp.com:8080.

MobiLink server responds with a 404 Not Found error that also mentions the MobiLink server's major version.

See Introduction to the Relay Server.