We are in the process of migrating away from a Cisco PiX 501 to another firewall.
As a result, we have a different IP address for our default gateway. Most machines on the network are moving over to the new firewall as they reboot and use DHCP to configure themselves. However, a few machines has their IP and gateway addresses statically configured, and as a result, are still using the old firewall.
So far, we have found 5 machines that had problems when we temporarily turned off the PiX. This was done the hard way (our DNS system went down until we figured it out), and I would prefer to avoid embarrassing myself any more.
Is there anyway to confgure the PiX to log the IP addresses of any machines that are still using it as the IP gateway?