what about the unique proxy address? it seems to me it does play a role in granting access. if i understand it correctly, the port knocking technique works by sending a sequence of ports to get the server to execute a predefined command but proxy client cannot do that. -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/how-to-implement-access-control-using-connetcing-hostname-and-port-tp4666818p4666857.html Sent from the Squid - Users mailing list archive at Nabble.com.