Hi Everyone, Anyone know exactly what the mechanism is for detecting an upstream proxy? That is, when an alert is thrown saying the upstream proxy couldn't be contacted how is that discovered? I'm assuming it isn't an ICMP echo since ICMP is not permitted between my ISA and the upstream server. Is it as simple as an HTTP request failing? Thanks :) -Shawn > ____________________ > > Shawn R. Quillman > Robert Bosch Corporation AN-Fh/CIT5 > 38000 Hills Tech Drive > Farmington Hills, MI 48331 > (248) 553-1164 (P) (248) 848-2855 (F) > shawn.quillman@xxxxxxxxxxxx > ____________________ >