Hi Amos, Thanks for a very quick reply. I have a couple of more questions. 1. What is a WCCP setting? 2. How can I check if the ipv4-mapping feature is disabled or not available in my kernel? I am using Red Hat Linux 6.2 flavour with a GNU/Linux OS. Thanks in advance. Regards, Anita -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/ipv6-support-for-3-1-16-tp4658490p4658609.html Sent from the Squid - Users mailing list archive at Nabble.com.