Besides some sort of auth I used another scheme on LINUX: Set up some script on the client, to email change of dynamic IP to proxy machine. There, modify firewall rule to allow access to proxy for the new IP. As dynamic IPs usually do not change very often a day, this should be sufficient. -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/how-to-differentiate-your-clients-tp4664440p4664481.html Sent from the Squid - Users mailing list archive at Nabble.com.