Gregory's Server@marius851000 @bortzmeyer Thanks, could really use some expertise on that.
Very hard to imagine how something like this could happen by accident without breaking the rest of the internet, but maybe there are some explanations after all, I just don't know what else to check.
@lnkr_ @marius851000 Two of the tested RIPE Atlas probes are at Silknet, two at Magticomas.
Also, when DNS resolvers lie for censorship,they typically return NXDOMAIN or localhost or the IP address of a Web site with warnings. I never saw SERVFAILs being returned.