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 but not like a connectivy issue (because of depeering by Cogent and Lumen) either.