How can I tell which ports an application is trying to use on Mac OS X 10.6.3? For example, I have my Mac Mail configured to connect to an SSL port on 993. However, I get errors that it cannot connect. Port 993 is open on the firewall. I shut off my modem/router firewall and it is able to connect.
With the firewall up and running a Netstat through the Network Utility, I see entries such as this:
tcp4 0 79 192.168.0.4.55886 mx251o.mysite4no.imaps FIN_WAIT_1
I have the entire 54000-56999 block open for TCP/UDP. What does FIN_WAIT_1 mean and could that be why Mac Mail can't connect?