Hi all Sorry to bother you on this, but at last setup a test area for this. Site A = 1 machine 2Nics 1 public IP on external NIC SBS2003, ISA 2000, AD, DNS for AD and 3 public domains and 1 WWW site. Site B = 2 machines Machine1 -> Windows 2000 Server, ISA 2000, AD, DNS for AD and 3 public domains 2 WWW sites, 1 public IP Site A must be primary for its domains and secondary for site B domains (and obviously AD) Site B must be primary for its domains and secondary for site A domains (and obviously AD) Have 4 packets filters and publishing rules for DNS. DNS listens only to internal IP With DNS publishing rules disabled cannot get to www or receive emails. With them enabled I get to www and my emails but cannot do zone transfer as I get ISS Event ID 20009 DNS Zone Transfer from high ports detected fromIP:11997 to IP:53 Am I correct that I will need to remove the publishing rules (as Jim said earlier) BUT also get DNS to listen on the public IP? Is so how will this effect my AD domain ? I know I should have a DMZ :-) Please advise Regards William