[tor-relays] Become a Fallback Directory Mirror

teor teor2345 at gmail.com
Wed Dec 20 23:50:36 UTC 2017

Dear Relay Operators,

Do you want your relay to be a Tor fallback directory mirror?
Will it have the same address and port for the next 2 years?
Just reply to this email with your relay's fingerprint.

If your relay is on the current list, you don't need to do anything.

If you're asking:

Q: What's a fallback directory mirror?

Fallback directory mirrors help Tor clients connect to the network.
For more details, see [1].

Q: Is my relay on the current list?

Search [2] and [3] for your relay fingerprint or IP address and port.
[2] is the current list of fallbacks in Tor.
[3] is used to create the next list of fallbacks.

Q: What do I need to do if my relay is on the list?

Keep the same IP address, keys, and ports.
Email tor-relays if the relay's details change.

Q: Can my relay be on the list next time?

We need fast relays that will be on the same IP address and port for 2
years. Reply to this email to get on the list, or to update the details
of your relay.

Once or twice a year, we run a script to choose about 150-200 relays
from the potential list [3] for the list in Tor [2].

Q: Why didn't my relay get on the list last time?

We check a relay's uptime, flags, and speed [4]. Sometimes, a relay might
be down when we check. That's ok, we will check it again next time.

It's good to have some new relays on the list every release. That helps
tor clients, because blocking a changing list is harder.

Q: What about the current relay DDoS?

We don't think the DDoS will have much impact on the fallback list.

If your relay is affected, please:
* make sure it has enough available file descriptors, and
* set MaxMemInQueues to the amount of RAM you have available per tor
  instance (or maybe a few hundred MB less).

We're also working on some code changes. See [5] for more details.

[1]: https://trac.torproject.org/projects/tor/wiki/doc/FallbackDirectoryMirrors
[2]: https://gitweb.torproject.org/tor.git/tree/src/or/fallback_dirs.inc
[3]: https://gitweb.torproject.org/tor.git/tree/scripts/maint/fallback.whitelist
[4]: https://trac.torproject.org/projects/tor/attachment/ticket/21564/fallbacks_2017-05-16-0815-09cd78886.log
[5]: https://lists.torproject.org/pipermail/tor-relays/2017-December/013881.html

Tim / teor

PGP C855 6CED 5D90 A0C5 29F6 4D43 450C BA7F 968F 094B

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