Application port number changed

Question

I face a problem where the port number of the application (MetaProducts Offline Explorer) has been changed(800 to 7000) and dont know how can it automatically changed.

I trying to run telnet command in the server itself, e.g: telnet <ip address> <port number> the result was a blank command screen. what does this mean? and what is the expected result if the port number is not using by an application?

what are the thing I can check for why the port number is changed?

thank you in advanced.

Answer 1

It is not possible for a port to just change. The application has to intentionally close the socket that is using the old port and then open a socket on a new port.

Answer 2

Netstat.exe is part of OS. To list all open ports and processes that are listening or sending on these ports, type this command in cmd window:

netstat -noa