I have an untangle server that periodically stops transmitting traffic and becomes unresponsive. This happens about every two weeks but happened twice yesterday. As I can't log in I have just rebooted it which resolves the problem.
-Is this likely to be a hardware issue?
-Is there any way to do some troubleshooting (remembering that the server is unresponsive so troubleshooting will have to be done post-reboot)?