What is a Tor bridge?
If you have read about Tor, you may have seen the term "bridge." It solves a specific problem: what happens when a network tries to block Tor entirely.
The problem bridges solve
Normal Tor entry relays are publicly listed, so a censor can simply block them all. A bridge is an unlisted entry point that is harder to discover and block, helping people in restrictive places still connect.
If you want to go deeper, a beginner guide to the Hidden Wiki is a useful next read.
How it differs from a normal relay
Functionally a bridge is just an entry relay - the difference is that it is not published in the public directory. Some bridges also disguise Tor traffic so it looks ordinary, making blocking even harder.
Frequently asked questions
Why would someone need a bridge?
To connect to Tor from a network or country that blocks the public relays.
Are bridges legal?
In most places, yes - like Tor itself. Always check the laws where you live.