Pluggable transports are tools that Tor can use to disguise the traffic it sends out. This can be useful in situations where an Internet Service Provider or other authority is actively blocking connections to the Tor network.
Currently there are six pluggable transports available, but more are being developed.
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obfs3 |
obfs3 makes Tor traffic look random, so that it does not look like Tor or any other protocol. obfs3 bridges will work in most places. |
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obfs4 |
obfs4 makes Tor traffic look random like obfs3, and also prevents censors from finding bridges by Internet scanning. obfs4 bridges are less likely to be blocked than obfs3 bridges. |
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Scramblesuit |
ScrambleSuit is similar to obfs4 but has a different set of bridges. |
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FTE |
FTE (format-transforming encryption) disguises Tor traffic as ordinary web (HTTP) traffic. |
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meek |
These transports all make it look like you are browsing a major web site instead of using Tor. meek-amazon makes it look like you are using Amazon Web Services; meek-azure makes it look like you are using a Microsoft web site; and meek-google makes it look like you are using Google search. |