Hi, Please help me with a problem I'm experiencing: I have a ISA Server Ent. SP1 with several published servers, including 2 DNS Servers. These servers are located in my intranet. Everything is working perfectly, but from time to time (usually once a week) servers from the Internet cannot access neither of the 2 published DNS Servers, as if they weren't there. No error events are registered in the ISA or in the DNS machines and web publishing is not affected.A simple stop-start of the firewall service puts everything back to normal. Does anybody have a clue on this? Thanks, Alexandre Valente