Hello, thank you for your response. Unfortunately, my client has a dynamic IP address. My squid version is 2.7 stable 8 for windows. Perhaps there is a way with the mac adress of my client? -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/how-to-differentiate-your-clients-tp4664440p4664463.html Sent from the Squid - Users mailing list archive at Nabble.com.