I have installed a Cisco PIX 501 at a client's site, and now a couple of weeks later we are having an issue where some computers cannot access the Internet. The PCs can ping the internal interface of the firewall, and can resolve hostnames. But about three of them cannot ping public IP addresses. I thought the arp cache might be corrupted on the switch, so we restarted that to no good effect.
I suspect that the client has somehow run up against the 10-user limit for their PIX 501 license.
The site has eight PCs and a server, so it doesn't seem like they should be going over the 10-user limit.
I'm not much of an expert when it comes to the PIX, so I wonder if someone can tell me how to determine whether this is the case, and maybe give me some tips on how to resolve the issue?
Thanks very much for any advice you can offer.