Multiple Sites on One IIS Server Need Different Outgoing IP Addresses

Question

I have an IIS server set up with multiple web sites, each with their own IP address. It works fine for routing incoming traffic to the right site. However, outgoing traffic all appears to come from the IP address of the physical machine, not the individual sites. They need to appear to the outside world as separate IP addresses because the service they are communicating with differentiates by IP address alone.

Maybe someone has set up a NAT server to do this? Any ideas? Thanks!

Answer 1

This should be asked on serverfault.com

Answer 2

When you communicate which level are you? If you are in TCP level you can set an interface to use.