Bob Are the other servers forwarding requests to the DNS server which is the sbs (ISA) machine? Your DNS structure should be a follows Create 1 forward zone for internal servers. ie. intcompany.net and a reverse lookup up zone for PTR records for the 192.168.x.x network. Then Create a second zone for external Zone information i.e company.com, and a reverse lookup zone for your external IP's. You then point each NIC with its ipaddress to the same server remembering to fill in the dns suffix for this registration I.E the 192.168 nic address to intcompany.net and external 215.233.133.2 to company.com I hope this helps. Stephen