I've ISA in NAT configuration, with one external and one internal nic. Internal web servers are published in a standard way mentioned in the ISA bible. I added another IP address on the external nic and tried to publish an internal web server using that address. Everything works fine internally, I can ping the second external ip address, and browse the website using browser. However, neither can I ping the 2nd IP address from outside, nor can I access the website using the browser (the new name is not registered in DNS yet, so obviously using ip). I intent to give another DNS name for the website I intend to publish using the second IP address. The primary IP address and web servers published on that address are working fine. Any suggestions are appreciated.