ISA SP1 quite simply, DNS just stops working randomly wierd thing is: NETSTAT on the ISA server shows nothing connected to the back end DNS server when I have NSLOOKUP running from the outside however If I telnet to port 53. NETSTAT shows an ESTABLISHED connection. I tried disabling/enabling the publishing rule this time and it did nothing. PRE-SP1 had a fix for this that I applied and it seemed to do the job kinda seems like SP1 undid this? -Jay Mobley