ufw has IPv6 disabled by default (this will likely change very soon) in such a way that only traffic on the loopback is allowed. To enable IPv6 support in ufw, you adjust /etc/default/ufw as you did, then restart ufw with 'sudo ufw disable ; sudo ufw enable'. Once that is done, the default policy is in effect, which by default is 'deny', so you must add rules for the traffic you want to allow, just list with IPv4. If you added generic rules before you enabled IPv6, you will have to add those again with IPv6 enabled. See 'man ufw' for details.
What you have described as a bug sounds like ufw is operating as documented. I am going to close the bug for now. Please reopen if you find this in error. ** Changed in: ufw (Ubuntu) Status: New => Invalid ** Changed in: ufw Status: New => Invalid -- ufw breaks ipv6 https://bugs.launchpad.net/bugs/633044 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs