[atlas] Facebook in Russia and a diagnostic problem

On Mon, Mar 14, 2022 at 8:13 PM Stephane Bortzmeyer <bortzmeyer at nic.fr> wrote:
>
> Around half of the RIPE Atlas probes in Russia cannot complete a TLS
> session with facebook.com
> <https://atlas.ripe.net/measurements/39387725/>. (All the remaining
> tests have been done with the same set of probes, 'type': 'msm',
> 'value': '39387725'.) They have no problem with YouTube
> <https://atlas.ripe.net/measurements/39387839>. I also did TLS tests
> with IP addresses instead of names, same result
> <https://atlas.ripe.net/measurements/39387985>
> <https://atlas.ripe.net/measurements/39388031>.
>
> There is no lying DNS resolver <https://atlas.ripe.net/measurements/39387902>.
>
> But traceroute show no connectivity problem either, we can go to the
> Facebook AS from Russia <https://atlas.ripe.net/measurements/39388122>
> <https://atlas.ripe.net/measurements/39388176>.
>
> So, I'm a bit lost: what do we observe? It does not look like
> censorship

It is. Facebook is officially blocked in Russia [1]

[1] https://rkn.gov.ru/news/rsoc/news74156.htm

> but not like a connectivy issue (because of depeering by
> Cogent and Lumen) either.
>
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-- 
SY, Jen Linkova aka Furry