We have recently converted from a T1 to Verizon FIOS and I am having problems getting our Cisco PIX 501 firewalls back online. We have a 50 user PIX 501 that has been our primary firewall and a 10 user PIX 501 that is our backup device. Since the cutover to FIOS, we have been unable to get the 50 user device to function properly. The 10 user PIX runs fine. We have 5 static IP addresses for different servers behind the firewall and for VPN users. I have the exact same code in the 50 user PIX and when I connect it, I can not browse to the internet or get the traffic in to the different servers, etc. I can ping out thru the telnet session, but that is all I can do. I have tried cutting the config down to barebones and I still can not get out. I even borrowed another 50 user PIX and tested it with the same results. I spoke with Verizon tech support and they don't have any ideas. Are there any suggested troubleshooting techniques that I should use to continue researching this?