Can someone please explain destination sets for server publishing. I want to test ISA Server without using FQDN. In Tom's article on web publishing he states that you should have destination sets and imputs the following: www.domain.com ftp.domain.com mail.domain.com We don't have External DNS configured yet, once configured will it even know what domain the request is coming from? We have to look at destination sets coming from the external users correct. I can undestand imputing IP address' to limit user access to a web site via IP, but the wev sute we have, we want open to everyone. I'm just really looking for a complete picture and understanding. Thanks for your time.