We have an issue with our infrastructure as far as external network security. Our initial configuration was a PIX 515E as our endpoint with NAT configured on it. Behind the PIX was an ISA server with NAT, caching, and proxying. That configuration worked fine for us for over one year. We recently added a load balancing device for Internet (a cable modem and a T1 line). This device added another NATing on our network. So that makes three devices NATing one after the other. When connected Internet access was very slow. The load balancing device is properly configured (as per the vendor). Could this be an issue of NATing too many times? Any ideas? Thanks in advance!