Hi list, Slightly off-topic: Has anybody experienced a problem with DNS service dying intermittantly? I have my internal DNS setup as a forwarder and allowed DNS communication on ISA. Every now and then the DNS dies resulting in Secure NAT clients not able to resolve external addresses. First I thought this could be caused by my testing on the ISA server but I found out that this happens even if I don't touch anything. I applied all necessary updates and SPs and checked KB but without success. Any idea?? Thanks mark