What's the mindset behind configuring the external interface in preperation for OWA behind a DSL connection? I know that with a static IP you can simply add that IP to the external interface of the ISA server and have your ISP point a host record to it for, lets say mail.yourdomain.com. How's this done with a dynamic IP on a DSL connection if the external interface is using a private IP? feelin a warm liquid seap from my ears... thnks