Bind listener to an IPv6 from AnyIP subnet

Serg me at at.encryp.ch
Sun Mar 12 17:07:20 UTC 2023


I have reloaded the configuration as well as restarted the bind9. The 
simpliest workaround I see - bind IPv6 explicitly to the interface using 
command "ip address add 2001:db8::1 dev eth0" and then I am able to use 
2001:db8::1 for the named. But I would like to take advantage of using 
AnyIP.

On 3/12/23 19:03, Darren Ankney wrote:
> Just a quick question because I ran into this problem before... is it
> possible that named was started before the ip was added?
> 
> On Sun, Mar 12, 2023 at 12:55 PM Serg via bind-users
> <bind-users at lists.isc.org> wrote:
>>
>> Hello, I am trying to bind named listener to an IPv6 from prefix which
>> is assigned to a system via AnyIP kernel feature - basically, it is done
>> by the following command: sudo ip -6 route add local 2001:db8::/32 dev lo.
>>
>> To be able to use IPv6 from AnyIP prefix the following sysctl must be
>> applied: net.ipv6.ip_nonlocal_bind = 1
>>
>> Having above, I am able to use any IP from AnyIP prefix in all software
>> but named refuses to create socket, which listens to that kind of an IP
>> address.
>>
>> As an alternative approach I have tried to run with a configuration
>> "listen-on-v6 { any; }", but it does behave in a way I need - it binds
>> separate socket for each discovered IP address rather wildcard address
>> of [::].
>>
>> Had anyone faced the same or similar issue?
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