I have finally found the solution; logformat combined configuration directive in Squid -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/Reverse-proxy-finding-out-what-robots-IPs-and-user-agents-are-sending-you-most-of-the-requests-tp4656972p4656973.html Sent from the Squid - Users mailing list archive at Nabble.com.