radvd.conf - invalid all-zeros prefix



  • In my system logs there is this log entry: invalid all-zeros prefix in /var/etc/radvd.conf, line 9

    It is not a daily entry, just a few times each month. It comes between "attempting to reread config file", & "resuming normal operation" log entries. I understand that radvd.conf is for IPv6. The only interface that I have a IPv6 rule on is my LAN but not sure that I need it because all my internals are IPv4? Also, under System --> Advanced --> Networking, I do have Allow IPv6 checked?

    Here is a snapshot of my LAN rules & WAN rules respectively:
    lan rules.png

    wan rules.png



  • I do not know the reason but to get an idea of what's wrong please look at the file /var/etc/radvd.conf when this error occurs. You might also want to save a copy of that file in a moment when everything looks alright just to compare the differences.
    It might also help to post the full file here.
    Other than that you could disable radvd completely (Services / DHCPv6 Server & RA) since you're not using IPv6 at all, which is a shame 😆 😉
    Maybe you would like to start using it, makes life easier.



  • I’ll check the .conf file and report back. IPv6 is new to me. What advantages are there to a small user, other than a ton more assignable IP addresses? Is networking somehow easier or more secure? I’ll need to educate myself more on it.



  • @aljames
    Yeah, go read some stuff. There are some nice automatic mechanisms like Link Local Addresses or Prefix Delegation.
    The fact that there are more addresses is also nice since you can run downstream routers for example without the need of IP Masquerading. When it comes to security it might also give us advantages because we go back to where the Internet started, to real peer to peer connections.
    We have run out of IPv4 addresses, at least in the US and Europe so IPv6 is the way to go.



  • @aljames said in radvd.conf - invalid all-zeros prefix:

    I’ll need to educate myself more on it.

    IPv6 Essentials is an excellent reference. In addition to the things mentioned above, there are also some things that go to improved performance, such as fixed length headers and more.

    Here is another excellent reason to move to IPv6.

    Despite clear warnings, Europe is out of IP addresses—again

    There haven't been enough IPv4 addresses for several years and the situation is getting worse.


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