Subj : List of IPv6 nodes
To   : Janne Johansson
From : Michiel van der Vlist
Date : Thu Oct 25 2018 12:47:45

Hello Janne,

On Thursday October 25 2018 10:06, you wrote to Benny Pedersen:

 MvdV>>> If the destination address is a 6to4 tunnel address (2002::/16)
 MvdV>>> many OSs default to IPv4 if an IPv4 address is present.

 >> time to update to a later glibc where ipv6 is prefered over ipv4
 >> failback

 JJ> I think its mostly a setting in your resolv.conf or similar file to
 JJ> change default priority of v4 or v6 and not so much a age-of-glibc
 JJ> issue.

Prefering IPv4 over IPv6 in case of a 6to4 tunnel makes sense for most applications. 6to4 is irratic end not very reliable. When browsing the web prefering IPv6 may lead to annoying delays because of fall backs to IPv4.

With binkd this is different. It is not a human that gets annoyed, it is a patient robot that does not mind first trying IPv6, failing and then trying IPv4 a minute later.

That is why it makes sense to leave the OS preference as is and override it in binkd's config when desired.


Cheers, Michiel

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