[tor-bugs] #18605 [Core Tor/Tor]: Consider including fallback directory mirrors with multiple IP addresses (was: Consider including fallback directry mirrors with multiple IP addresses)

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#18605: Consider including fallback directory mirrors with multiple IP addresses
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 Reporter:  teor          |          Owner:  teor
     Type:  enhancement   |         Status:  new
 Priority:  Medium        |      Milestone:  Tor: unspecified
Component:  Core Tor/Tor  |        Version:
 Severity:  Normal        |     Resolution:
 Keywords:                |  Actual Points:
Parent ID:                |         Points:  3
 Reviewer:                |        Sponsor:
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Description changed by arma:

Old description:

> arma describes the advantages of hard-cording bootstrap IP addresses that
> aren't in the consensus:
>
> https://lists.torproject.org/pipermail/tor-dev/2016-March/010588.html
>
> I think we could do this with fallback directory mirrors, to increase the
> chances of Tor bootstrapping successfully in these environments.
>
> With two authority attempts in 0.2.7, it's roughly 47% (2/9 + 2/8).
>
> We already have the same or greater probability of bootstrap success with
> fallbacks and authorities and an increased number of attempts. But it
> would be nice to use this trick for about 10% of fallbacks.
>
> This will require changes to the fallback selection script and the
> whitelist format.

New description:

 arma describes the advantages of hard-coding bootstrap IP addresses that
 aren't in the consensus:

 https://lists.torproject.org/pipermail/tor-dev/2016-March/010588.html

 I think we could do this with fallback directory mirrors, to increase the
 chances of Tor bootstrapping successfully in these environments.

 With two authority attempts in 0.2.7, it's roughly 47% (2/9 + 2/8).

 We already have the same or greater probability of bootstrap success with
 fallbacks and authorities and an increased number of attempts. But it
 would be nice to use this trick for about 10% of fallbacks.

 This will require changes to the fallback selection script and the
 whitelist format.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18605#comment:6>
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