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Re: [libreoffice-website] IPv6 to IPv4 redirection from MirrorBrain

Hi wget,

On Thu, 15 Aug 2019 at 17:45:09 +0200, William Gathoye wrote:
> or is MirrorBrain smart enough to redirect connections established from
> an IPv6 src address *ONLY* to IPv6 capable mirror servers ?

The server can't know whether v6-connected peer is dual-stack or not.
Right now it assumes it is, so might indeed redirect to a v4-only mirror.

MirrorBrain has a bug report about that (with some code)
https://github.com/poeml/mirrorbrain/issues/161 about this, but there is
little upstream development AFAICT. I'm still looking at mirrorbits for
a candidate replacement.

Right now 66 of our 116 enabled mirrors have at least one AAAA record,
and the distribution varies between 40 and 60% between regions, so it
should be doable to exclude v4-only mirrors for v6-connected peers.
It's not always been the case.

However, my gut feeling is that most v6-connected peers are dual-stack,
and so far no one has reported this as a real issue. Personally I think
it's more useful to do that for TLS connections (redirecting TLS-connected
client to https:// mirrors). That's upstream issue #143 :-) There are
still quite a few countries without any TLS-capable mirror though.


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[libreoffice-website] IPv6 to IPv4 redirection from MirrorBrainWilliam Gathoye <william@gathoye.be>
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