I just installed ISA 2006 on a client's network. Everything seems to be working fine but when I look at the logs, I'm seeing that for every connection to the internet, ISA first sends a request to the web server over port 8080, which gets denied, and then over port 80, which gets accepted. Is this normal? If it is normal, why does it do that? If it is not normal, what do I do to fix this?