Good news, everyone! TL;DR: Pali, I've (finally) managed to reproduce and fix this bug (IPv6 UDP DNS), with your recommendation of the program 'jdns'. For reference, here's my reproduction procedure, on a fresh install of Precise server (a slight variation on a method Pali developed):
sudo apt-get install dnsmasq echo listen-address=::1 | sudo tee /etc/dnsmasq.d/ipv6 echo nameserver ::1 | sudo resolvconf -a lo.inet6 sudo /etc/init.d/dnsmasq restart # fetch and build https://github.com/psi-im/iris/tree/master/src/jdns ./jdns -d -6 uni AAAA google.com ::1 ... kernel versions >= 3.13.0-69.112~precise1 fail with "[1] Error: Timeout" Ian, thanks very much for the pointer! Your mention of Debian bug 808293 led to this pending patch, which does fix this bug (and hopefully your tftp bug also): https://patchwork.ozlabs.org/patch/561746/ ("udp: properly support MSG_PEEK with truncated buffers") Here's an amd64 test kernel which is 3.13.0-69.112~precise1 + a simple backport of that patch. Pali, this passes the 'jdns' test. Can you confirm that it resolves your original issue too? Ian, does it also fix your tftp problem? http://kernel.ubuntu.com/~kamal/lp1527902/linux- image-3.13.0-69-generic_3.13.0-69.112~precise1+lp1527902_amd64.deb ** Changed in: linux (Ubuntu) Assignee: Joseph Salisbury (jsalisbury) => Kamal Mostafa (kamalmostafa) ** Changed in: linux-lts-trusty (Ubuntu) Assignee: Joseph Salisbury (jsalisbury) => Kamal Mostafa (kamalmostafa) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1527902 Title: 3.13.0-71: IPv6 UDP DNS packets are not received To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1527902/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
