Hi All, Just tested the latest 3.4.2, same issue with the %>ei, no MAC address in the access log file. Could you confirm ? Bye Fred -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/Squid-3-4-0-1-20130909-r12987-eui-not-working-tp4662049p4664151.html Sent from the Squid - Users mailing list archive at Nabble.com.