I am also seeing problems with UDP ... in my case, TFTP failures. Error message is " service tftp, recvfrom: Resource temporarily unavailable (errno = 11)" in syslog. I suspect this is the same issue: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=808293
** Bug watch added: Debian Bug tracker #808293 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=808293 -- 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