I've been tasked with setting up our ASA to allow traffic from two ISPs. Currently, ISP1 is for mail, VPN, Remote Web Workplace (SBS 2003), and internet. My boss would like me to set up the DMZ interface to accept HTTP traffic and direct it to a web server on the inside (like a second outside interface). Eventually, he would like me to move services one by one from ISP1 to ISP2.
From everything I've read, this isn't possible. This would seem to require Policy Based Routing, which the ASA doesn't support. I've found this: https://learningnetwork.cisco.com/docs/DOC-10831. Correct me if I'm wrong, but this seems to allow HTTP(S) connections on ISP2 that originate from inside, it wouldn't work for hosting a web server internally, would it?
Additionally, I've found references to utilizing multiple ISPs, but to do so requires a router on the outside of the ASA, like here: http://www.youtube.com/watch_popup?v=2rVkUIuXEMM&vq=hd720#t=31. As we have no extra routers or layer 3 switches lying about, this option will not work for me either.
Can anybody tell me if this is even possible? If so, could you please point me in the right direction to get started?