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 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.
Cheers,
--
Guilhem.
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