Hi, I have a Win2k SP4 with ISA Server SP2 that publishes several websites and several servers and it is working just fine. But I am experiencing some strange problems, sometimes the firewall service stops responding. I do not get any error and the service keeps running but it stops answer to requests. I believe it happens when a get a lot of connections in the firewall service, the last time it hang I was using a log analyzer that was trying to resolve several IP address at the same time, but im not sure if this has anything to do with it. I believe there was a bug that caused a DoS in the firewall service but it was resolved in SP1 ... Any ideas ? Best regards, Nelson Camacho