>how to ensure that my client do not use my proxy outside his office? < In case, client has fixed IP, you could set up an ACL in your squid only allowing access from this special IP. Or, even better, you just define a rule for iptables only to allow the clients IP to access the squid-port. You will need something like this anyway, to avoid "bad guys" abusing your squid after doing port scans. -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/how-to-differentiate-your-clients-tp4664440p4664456.html Sent from the Squid - Users mailing list archive at Nabble.com.