Hi, ASA does not support any IPoverIP such as GRE. Which SW Version you have on ASA? Could you send me the link where it is written to create a tunnel between the ASA and the Squid? What is your ASA config? "sh run interface" "sh run wccp" or "sh run | grep wccp" Once I tried WCCP with PIX SW Version 7.2.2 and collected my info here: http://www.tar.hu/ashley77/Configuring_PIX_and_SQUID_or_WAAS_for_WCCP.ht ml Regards, Akos