static nat incoming traffic based on domain name?

[m.matteson]

heres an interesting question a friend of mine asked. i don't know of a way to do it, possibly there is none. but maybe one you of smarter guys will show me up eh? anyways here is whats up. there are two servers running IIS behind a router running nat. one for exchange one for a website, both run on port 80 because both use IIS. can you forward an incoming www.domain.com requests to server1 on port 80, and forward incoming request webmail.domain.com to server2 on port 80? anyway to do that using either nat or CBAC?

[mark-obrien · Accepted solution]

What you are describing is not really a NAT issue, but an upper layer switching problem. Cisco makes Content Service Switching equipment that switches traffic based upon content in layers 4-7, in addition to IP address. This upper layer information can include TCP/UDP ports or even URL content. You can set up the CSS switch to direct webmail to one server, and http traffic to another.