Hello, Thanks amos, your Ipv6 patch works very well, but for now i have another problem. There are many crashes with FD_WRITE_METHOD function. here is the backtrace: #0 0x000000020d0e785a in write () from /usr/lib/libc.so.65.0 #1 0x000000020fda254f in write (fd=163, buf=0x205099000, nbytes=1656) at /usr/src/lib/librthread/rthread_cancel.c:547 #2 0x000000000051b4dc in default_write_method (fd=Variable "fd" is not available. ) at fd.cc:183 #3 0x00000000006c14dd in Comm::HandleWrite (fd=163, data=0x20c8baca8) at Write.cc:92 #4 0x00000000006bdc42 in Comm::DoSelect (msec=612) at ModPoll.cc:525 #5 0x000000000065b60b in CommSelectEngine::checkEvents (this=Variable "this" is not available. ) at comm.cc:2068 #6 0x000000000051441c in EventLoop::checkEngine (this=0x7f7ffffec010, engine=0x7f7ffffec090, primary=Variable "primary" is not available. ) at EventLoop.cc:51 #7 0x0000000000514635 in EventLoop::runOnce (this=0x7f7ffffec010) at EventLoop.cc:125 #8 0x00000000005147f8 in EventLoop::run (this=0x7f7ffffec010) at EventLoop.cc:95 #9 0x000000000058a243 in SquidMain (argc=4, argv=Variable "argv" is not available. ) at main.cc:1501 #10 0x000000000058a5a8 in SquidMainSafe (argc=Variable "argc" is not available. ) at main.cc:1216 #11 0x00000000004a52c1 in ___start () #12 0x0000000000000000 in ?? () Any idea ? -- Best regards, Loïc BLOT, Engineering UNIX Systems, Security and Networks http://www.unix-experience.fr