I'm looking for any ideas on an easy-to-use, preferably free, utility which can help me determine what ports an application is trying to use when communicating with the network or other servers.
ie. A server is "supposed to be" communicating through ports 1433, 2121, and 8085. I'm told those ports are open through the firewall by our networking team, but the application fails to work properly.
I have tried wireshark but this is really a complex tool. Anything else out there which could help me?