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How Is Russia Blocking Calls on WhatsApp/Telegram/Face Time/Snapchat/?

• urcite_ty_kokos 9mo ago
  Hi, I was wondering how is it technically possible for Russia firewalls to block calls over these platforms, while keeping chat messages working? Thanks My guess is that it is because of a different layer 7 protocol than HTTP is used for calls, and the code of the protocol leaks in the TLS/SSL header. Is this guess correct?
• doc_doom 9mo ago
  Ngl same question for United Arab Emirates
• belter 9mo ago
  Its DPI mostly from this company: https://theins.ru/en/politics/265749 https://theins.ru/en/politics/265749
  • urcite_ty_kokos 9mo ago
    Time to learn more on DPI, thanks.
    • belter 9mo ago
      If you want to explore and make some tests of your own, nDPI is the most popular open-source DPI engine. https://github.com/ntop/nDPI https://github.com/ntop/nDPI https://youtu.be/NndEp7__Y1A https://youtu.be/NndEp7__Y1A
  • wkat4242 9mo ago
    It won't be the only solution that can do this by the way. Many airplane WiFi services block WhatsApp and telegram calls. I think they just look at the traffic shape. Real-time traffic requires a lot of constant similar sized traffic per second, rather than texting or images which is much more bursty.