topic Re: restrict file sharing via telegram in Firewall and Security Management

restrict file sharing via telegram

leangm — Mon, 05 Dec 2022 05:01:34 GMT

is there any possible way to restrict file sharing via telegram and allow only telegram chat and call?

production security gateway 6200

R81.10 hotfix takes (open)

Re: restrict file sharing via telegram

Blason_R — Mon, 05 Dec 2022 06:12:50 GMT

Why not use custom application builder and try building the application if that is not available natively in CP

https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk103051&partition=Basic&product=Application

Re: restrict file sharing via telegram

PhoneBoy — Mon, 05 Dec 2022 15:20:14 GMT

This is quite likely not possible given HTTPS Inspection would be required and the app will break due to Certificate Pinning.
You could use rate limiting to severely limit the speed of any Telegram connection, thus making any file transfers slow (might also impact calls over Telegram as well).

Re: restrict file sharing via telegram

Blason_R — Mon, 05 Dec 2022 16:18:38 GMT

Yes - obviously after HTTPS inspection else this would not work. I by default assumed that HTTPS inspection is on

Re: restrict file sharing via telegram

_Val_ — Tue, 06 Dec 2022 13:35:40 GMT

telegram uses proprietary encryption, so the answer is no.

Re: restrict file sharing via telegram

Lesley — Wed, 07 Dec 2022 08:32:10 GMT

I would recommended to block the complete Telegram application on the firewall.

Since HTTPS inspection is not possible. It is not waterproof but it should work in theory.

Also I am wondering if you still want to use Telegram on a work environment. But maybe that is more a political discussion.