Purely hypothetically, imagine a situation when enemy agents seized power, we are in information occupation, we are placed in an information bubble.

You see me as the master of France, but I would not undertake to rule it even for three months with a free press.

- Napoleon I

Of course, hypothetically, in fact, this cannot happen to us. And what is being blocked now (how the blocking is arranged in the Russian Federation and the Republic of Belarus ) is, of course, "for our good."

The purpose of this article: to find and analyze open or at least closed but free and convenient tools that allow you to access information in the event of partial or complete blocking of access to the Internet.

If you are too lazy to read, I will be brief: Tor and Bridgefy are what every freedom of information fighter should have.

Disclaimer: The "inspiration" for this article was the lawlessness that takes place in the native land.

Materiel

Consider how we can be denied access? We have a fictitious Internet resource example.comwith an IP address 123.123.123.123. What can they do with him?

IP (IP black hole). . IP . DNS A . Content Distribution Network (CDN), IP, IP - . IP - . Telegram, CDN IP-, — . . c .
DNS (DNS hijacking). : DNS .

. DNS , . , DNS DNS (Google DNS 8.8.8.8 Cloudlfare DNS 1.1.1.1) IP-, ( 123.123.123.123). DNSSEC. : , DNSSEC . , DNS over HTTPS DNS over TLS. Apple: macOS Big Sur iOS 14 . Windows 10 Insider . Linux systemd-resolved . , Firefox DNS over HTTPS . Chromium .
(Deep Packet Inspection, DPI) - . , Ideco Selecta ISP, . , IP , L4 , . TLS ipher Suite HTTPS. , , TLS Handshake. SNI TLS Client Hello , ( "example.com"). DPI - .

- : Encrypted SNI (ESNI). DNS over HTTPS/TLS DPI , . ? . Firefox . Chromium . ESNI , , . , . , DPI : navalny.com, TCP Window Size, SNI TCP c. DPI, , TCP — .
. , "" , "". " , ".