I want to filter Telegram Messenger to monitor the network activities (logging) from any platform. I'm wondering if there is any signature I can look into to detect the traffic, maybe a list of server IP's and TCP/UDP ports for the telegram service or any other identifier that I can use as a starting point?
I know that the traffic is encrypted. I don't want to look into the content, I just want to register that "this IP used telegram at this time", is that possible? I'm looking for the easiest and the fastest algorithmic way to do this.