[tor-bugs] #29297 [Obfuscation/Obfsproxy]: Write reachability tests to verify if obfs4 is working or not (was: Add any necessary metrics to verify if obfs4 is working or not)

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#29297: Write reachability tests to verify if obfs4 is working or not
-----------------------------------+---------------------------
 Reporter:  chelseakomlo           |          Owner:  cohosh
     Type:  task                   |         Status:  assigned
 Priority:  Medium                 |      Milestone:
Component:  Obfuscation/Obfsproxy  |        Version:
 Severity:  Normal                 |     Resolution:
 Keywords:  obfs4                  |  Actual Points:
Parent ID:  #29279                 |         Points:  2
 Reviewer:                         |        Sponsor:  Sponsor19
-----------------------------------+---------------------------
Changes (by cohosh):

 * status:  new => assigned
 * owner:  (none) => cohosh
 * type:  defect => task


Old description:

> Ensure that we have all necessary metrics to verify if obfs4 is working
> for users.
>
> TODO: Determine what these metrics should be, where they should be added,
> methods for aggregating them and analyzing them.

New description:

 The main goal of this is to determine whether obfs4 bridges are being
 blocked due to bridge IP enumeration, or if there is something blockable
 about the obfs4 protocol.

 These tests will use new, private (unpublished) obfs4 IP addresses that
 have not been used for censorship circumvention prior to these tests.

 The outcome should be a script that users we reach out to in censored can
 run from which we can collect metrics about their ability to connect and
 bandwidth measurements. Before we send out the script we should figure
 out:

 - Whether we have all necessary metrics on the bridge side to verify if
 obfs4 is working and whether it is being throttled

 - How we are going to collect the client-side measurement data

--

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/29297#comment:6>
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