I have a client that currently has a BorderManager 3.8 SP5 server set up with only 1 NIC for proxy services. They are not using it for a firewall; just HTTP proxy. Currently the 1 NIC is set for both the public and private interface. I want to change it to the more traditional config of 1 NIC for the private interface that user browsers point to and a second NIC for the public interface going out to the Internet through a separate firewall.

Intuitively it would seem that this would be a better performing setup. I just wondered if anyone had done any testing on this and could confirm that it would be better or have any other reasons why it would be better.