Ignition 7.2.9 on Windows XP
remote customer site with no internet.
I was unable to connect to the gateway from a browser. Most of the time. I think I restarted the service but I made no difference. The client would not launch. The error I kept seeing was some sort of socket error.
I copied the entire ignition direction directory, then rebooted, then everything worked.
Turns out there was a 3rd party utility that was misbehaving and not closing sockets on a failed connection attempt. After a while there were no more sockets left in the system to open, for anyone.