sysopt noproxyarp
can disable proxy-ARPs on a PIX Firewall interface.
If you disable proxy-arp, then all this does is cause the PIX to ONLY
respond to ARP requests for it's interface address. Any ARP requests
for a global IP in a static statement will be dropped.
If you disabled proxy-arp, then the upstream router (or device
attempting to contact the global IP in the static statement) must either:
a) have a route to the global IP pointing to the PIX interface as the
next hop
b) (if the global IP is on the same segment) then the device can use
static ARP entries
Syed