I managed to fix it. I Published DNS1 as Zone Transfer server and changed the Tranfer master on DNS 2 to the public IP ON ISA. Is it possible to do DNS Zone Transfers from a DNS server that is located behind the ISA server. My setup is as follows. ISA is installed on DNS1, (i know it's against the rules) DNS2 has a private IP behind ISA. DNS2 only has secondary zones that need to be transferred from da master, DNS1. I have setup a protocol rule to allow DNS zone transfer server, and DNS zone transfer, but no luck Thank you Tinus ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: isa@xxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')