My company has a Sonicwall Pro 3060 Enhanced that has been in service 24/7 for about 10 years since it was originally purchased.
Lately the box has seemed to have hiccups in passing traffic (although I don't have any proof it was the router/firewall at fault and don't know how to get proof). This past weekend during a firmware upgrade the box refused to load it's safe-mode interface (possibly corrupted ROM?)
Day-to-day operation seems fine, and nothing in the regular admin interface has issues as far as I can tell. I'm worried that the box is on the fritz and may go out soon.
How does one go about testing a firewall/router (I guess specifically Sonicwall) for signs of failure? I know it's served a long life, and would be reasonable to say it's on the last leg, but I'd like some proof if I can get it.