>What does Squid access.log say? When I access http://www.abcd.com, next message is described, "GET http://www.abcd.com/ HTTP/1.0" 503 1188 TCP_MISS:FIRST_UP_PARENT ALLOW This is the same message as other accesses. >On what kind of errors is this seen? Browser Error message is like below. ERROR The requested URL could not be retrieved ---------------------------------------- While trying to retrieve the URL:NONE://10.43.1.26:8080http://www.abcd.com/ The following error was encountered: Zero Sized Reply Squid did not receive any data for this request. ---------------------------------------- >Is this error really from your Squid proxy, or is it generated by your >upper proxy? (i.e. is there a Squid signature in the error?) There is a Squid signature. Regards Katsunori