Fascinating and sophisticated MiTM ('man in the middle') at Hetzner (DE) and Linode, targeting Russia's largest XMPP/Jabber (civilian) chat service. The authors of the article make a reasonably compelling case that "this is lawful interception Hetzner and Linode were forced to setup."
notes.valdikss.org.ru/jabber.r…
Excellent mitigation walkthrough here:
Sure gets me thinking.