>> What version of squid are you running, and which OS is it on? Thanks! > >squid 3.3.9 on FreeBSD 9.2. > >Regards, >Guy Hi Guy, I just attempted 3.3.9 on FreeBSD 9.2/amd64 and I get the exact same error. What are you doing different than I? Compiled from source with: --prefix=/usr --disable-ipv6 --enable-wccp2 (tried both with and without ipv6) The error (with squid -d 256): 2013/12/17 13:21:20 kid1| Ip::Address::GetSockAddr : Cannot convert non-IPv4 to IPv4. from [::] Assertion failed: (false), function GetSockAddr. file Address.cc, line 966. here is my wccp2 config from squid.conf 1.2.3.4 = interface on switch with wccp2 enabled 5.6.7.8 = local interface on squid box to listen on wccp2_router 1.2.3.4 wccp2_return_method gre wccp2_forwarding_method gre wccp2_service standard 0 wccp2_address 5.6.7.8 When I comment out "wccp2_router" -- issue disappears. Thanks again for your help! - Don