Hi I have a primary dns server running on the external interface for public name server. I have about 5 zones. All primary zone transfers to the secondary server work fine, however I have one secondary zone on the isa server that will not communicate with its primary master which is the secondary server for all the zones on the isa server. Note the name server is not configured to listen on the default address of the external nic, I multiple addresses configured on the external side of the server. Anybody have any suggestions? Jim