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Update your repositories and install TOR.

apt-get update && apt-get install -y tor

If you want to use TOR with OpenSSH, you have to install another program called connect-proxy.

apt-get install -y connect-proxy

Setup OpenSSH to use TOR for all connections

However, this is not recommended, but here is how it works.

Add the following block to the top of your ~/.ssh/config file.

Host *
CheckHostIP no
Compression yes
Protocol 2
ProxyCommand connect -4 -S localhost:9050 $(tor-resolve %h localhost:9050) %p

The command line syntax won't change at all.

Set up OpenSSH to use TOR for a specific connection

I recommend using TOR only for a specific connection. All other connections won't be affected.

Add this block to your ~/.ssh/config. You have to replace mydomain with the host domain name or IP address and myaccount with your user name.

Host mydomain
HostName mydomain.com
User myaccount
CheckHostIP no
Compression yes
Protocol 2
ProxyCommand connect -4 -S localhost:9050 $(tor-resolve %h localhost:9050) %p

Set up OpenSSH to use TOR for a bunch of connections

Instead of setting up TOR for every single connections, you can do this for a bunch of connections at once. Following example shows how it works.

Host anon_*
CheckHostIP no
Compression yes
Protocol 2
ProxyCommand connect -4 -S localhost:9050 $(tor-resolve %h localhost:9050) %p
Host anon_mydomain
HostName mydomain.com
User myaccount
Host anon_mydomain2
HostName mydomain2.com
User myaccount
Port 980

This way you know exactly if you're using TOR or not.

Conclusion

It is very simple to anonymize your SSH sessions if you know what you're doing. I've written this tutorial for legal purposes only. Using this is your own risk.