I hope someone can help with this problem. In a nutshell our organization publishes two internal webservers via our single isa server. I receive an intermittant though daily error where the isa server throws a proxy chain loop error and the internal web server is unavaible. We use a split dns and the isa server is not a dns server. Interestingly the proxy chain loop only occurs with a single internal website, not the other. As I said there is only 1 isa server and it sits behind a cisco router. Any idea what is causing the problem? thanks, Chris Rodriguez