Hello, The only performance data I've seen is what impact do ACLs have on a router and firewall targeted at SMBs with an 'Allow-only' US policy. They then compared it to using an IP Blocker appliance to cut the noise on the perimeter before it reached devices deeper in the network. http://www.techguard.com/support/breakingpoint-poliwall-testing/
The increase in latency and drop in TCP connections was substantive. The appliances all had less than 100 Mbit of throughput. Hope that helps -- Doug --- posted at http://www.serverphorums.com http://www.serverphorums.com/read.php?10,170409,545308#msg-545308
