Public bug reported: By default, ubuntu support ipv6, but tftpd doesn't so doesn't work. It's says in daemon.log:
tftpd: read: Connection refused A workaround it's to disable ipv6 with: echo "blacklist ipv6" >>/etc/modprobe.d/blacklist and reboot. ** Affects: netkit-tftp (Ubuntu) Importance: Undecided Status: Unconfirmed -- not compatible with ipv6 https://launchpad.net/bugs/71644 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs