Re:How Is Russia Blocking Calls on WhatsApp/Telegram/Face Ti...
by urcite_ty_kokos on Saturday December 27, 2025 @02:01PM
(#46404206)
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?
Re:How Is Russia Blocking Calls on WhatsApp/Telegram/Face Ti...
by wkat4242 on Saturday December 27, 2025 @04:14PM
(#46405297)
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.
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?
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.
https://github.com/ntop/nDPI
https://youtu.be/NndEp7__Y1A