A technician on a Communication Server 1000E SA Rls. 7x cannot get a second media Gateway to register with the Call Server. The call server and Media Gateway 1 sit in the same 19 inch rack while Media Gateway 2 is in another building and connected via the computer IP network Media Gateway 2 can ping the Call Server but cannot register. The network is suspected of having a firewall or port blocking issue.
Which diagnostic tool will help to isolate and identify a firewall or port blocking issue between the call server and Media Gateway 2?