
How does this work for machines that use ClientPreferIPv6ORPort 1
Sadly ClientPreferIPv6ORPort is somewhat broken with IPv4 only clients today. See https://gitlab.torproject.org/tpo/core/tor/-/issues/40913#note_2994762 for a concrete example of something that can easily fail badly for end users (but there might be other cases, possibly without using bridges). trinity-1686a On Tue, 12 Aug 2025 at 00:01, Marco Moock via tor-relays <tor-relays@lists.torproject.org> wrote:
Am 11.08.2025 um 15:48:52 Uhr schrieb Alexander Hansen Færøy via tor-relays:
Alex mentioned that he and GK had a discussion earlier this year about both a potential solution for having IPv6-only Middlenodes (in a network where all guards and all exits are dual-stack) and how one could do something similar to Happy Eyeballs within the Tor ecosystem.
How does this work for machines that use ClientPreferIPv6ORPort 1
Could that be default in torrc without breaking anything?
I have that set on my guard/middle relays and detected no issues.
https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/41742 Here someone mentions a case where issues might occur, but without any details.
-- Gruß Marco
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