[tor-relays] Improving Relay IPv6 - RIPE Grant

Paul Geurts paulus at pollekeg.com
Mon Dec 16 17:27:17 UTC 2019

hi Johathan,

this question was already addressed last week by Teor.
email on this mailing list doesn't always seem to arrive in a logical
sequence.... possible due to spam filters and so on.

gr. Paul
teor teor at riseup.net via
<https://support.google.com/mail/answer/1311182?hl=en> lists.torproject.org
Fri, Dec 13, 8:26 AM (3 days ago)

We won't be disabling IPv4 on relays any time soon.

The RIPE grant covers IPv6 address autodetection and self-testing.
If the feature is reliable enough, we may turn on IPv6 on dual-stack relays
by default. (When autodetection and self-testing both pass.)

We don't have any plans to disable IPv4 on relays. We'd need most relays
to be dual-stack first. (Or we'd need research about privacy in non-clique
networks.) And we'd need to write code that allows relays to turn off IPv4.

When that's all deployed, we would have to make an engineering decision
about the capacity of current IPv4-only relays, and the potential capacity
of IPv6-only relays.

One possible transition strategy is to allow IPv6-only bridges and exits.
But to do that, we need more dual-stack guards and middles. That's why
we are improving support for dual-stack relays with this funding.


On Mon, Dec 16, 2019 at 12:33 PM Jonathan Sélea <jonathan at selea.se> wrote:

> I am unable to see why this is a good idea actually.
> As someone said already, I too would be unable to provide bridges and
> relays thanks to my ISP (Telia) does not provide an IPv6.
> But removing IPv4 only nodes from the network - you are basically removing
> a large chunk of relays from the network without any real reason.
> On 12/12/2019 5:49 PM, NOC wrote:
> Great,
> than lets drop all IPv4 only relays from consensus 2020 finally.
> P.S. whitelist me so it doesn't take days till my emails appear on the
> mailing list.
> Thank you
> On 11.12.2019 03:20, teor wrote:
> Dear relay operators,
> I just wanted to let you know that RIPE has announced funding for The
> Tor Project to improve IPv6 support on relays. (RIPE is the European
> internet infrastructure organisation.)
> https://www.ripe.net/support/cpf/funding-recipients-2019
> We'll have more details early in 2020, when we've worked out an
> implementation plan and a start time.
> Thanks for your patience with our current IPv6 support. And thanks
> to all those volunteer coders who have worked hard to get us this far.
> T
> --
> teor
> ----------------------------------------------------------------------
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