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Accepted
Grumbel
Asked: 2010-10-22 08:25:57 +0800 CST

How to enable IPv6 via miredo along with UFW?

  • 772

Ubuntu provides some good information on how to enable UFW and on how to enable IPv6 with miredo:

But what is missing is information on how to properly configure UFW to let Miredo work, as as soon as I enable UFW IPv6 stops working:

$ ufw disable
$ ping6 ipv6.google.com
PING ipv6.google.com(2a00:1450:8004::93) 56 data bytes
64 bytes from 2a00:1450:8004::93: icmp_seq=1 ttl=56 time=1886 ms
$ ufw enable
$ ping6 ipv6.google.com
PING ipv6.google.com(2a00:1450:8004::6a) 56 data bytes
ping: sendmsg: Operation not permitted

So how do I properly configure both Miredo and UFW together that basic IPv6 is working, but with all other incoming traffic being blocked?

ipv6 ufw

2 Answers

  1. Best Answer

    IPv6 is disabled by default in current released versions of ufw. To enable, edit /etc/default/ufw to have:

    IPv6=yes

    You will also need to reload the ruleset. On newer releases of Ubuntu: 

    sudo ufw reload

    On older releases of Ubuntu, you can restart with:

    sudo /etc/init.d/ufw restart
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  2. IPv6 support in UFW has to be explicitly enabled by editing /etc/default/ufw and changing IPv6=no to IPv6=yes.

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