[Pkg-dns-devel] Bug#720864: Bug#720864: Fails to bind IPv6 socket during DAD

[W.C.A. Wijngaards]

Hi,

I have implemented ip-freebind socket option for Unbound.  Thank you for
the report, I did not know that it could be useful (next to the
ip-transparent option).

Best regards, Wouter

On 01/03/16 21:00, martin f krafft wrote:
> also sprach Robert Edmonds <edmonds at debian.org> [2016-03-01 20:14 +0100]:
>> I like the first suggestion even more:
>>
>>     Watch rtnetlink and react properly to network configuration changes
>>     as they happen. This is usually the nicest solution, but not always
>>     the easiest.
>>
>> But that is significantly more development work.
> 
> Would this enable me to say that unbound should just listen on iface
> "eth0"?
> 
>> By the way, have you tried "ip-transparent: yes"? According to
> 
> No!
> 
>> I wonder if IP_FREEBIND would actually be a better fit for the
>> functionality described in unbound.conf than IP_TRANSPARENT, since
>> unbound.conf doesn't mention any of the proxying properties of
>> IP_TRANSPARENT.
> 
> I agree.
> 
> Meanwhile, I found that adding
> 
>   dad-attempts 200
> 
> (standard ifupdown feature)
> 
> to the iface inet6 stanza in /etc/network/interface would make ifup
> wait up to 20 seconds for the DAD to complete… and block meanwhile.
> This is enough for my interface to come up with a non-tentative
> address and so by the time boot resumes, the address is fully
> configured.
> 


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