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SSH connection through host in the middle

Terminal - SSH connection through host in the middle
ssh -t reachable_host ssh unreachable_host
2009-03-03 23:21:36
User: patko
Functions: ssh
147
SSH connection through host in the middle

Unreachable_host is unavailable from local network, but it's available from reachable_host's network. This command creates a connection to unreachable_host through "hidden" connection to reachable_host.

Alternatives

There are 4 alternatives - vote for the best!

Terminal - Alternatives
ssh -t hostA ssh hostB
2009-08-27 21:35:19
User: 0x89
Functions: ssh
39

Of course you need to be able to access host A for this ;-)

ssh -o "ProxyCommand ssh [email protected]_host -W %h:%p" [email protected]_host
2015-06-26 06:23:14
User: renich
Functions: ssh
Tags: ssh
4

This command uses the reachable_host as a proxy; redirecting your request to the unreachable_host.

The main advantage is that you need only one ssh key. You copy the public part to both servers and you can access the unreachable_host without a problem.

Also, you can put this on ~/.ssh/config to access the unreachable_host directly:

# config

unreachable_host

ProxyCommand ssh [email protected]_host -W %h:%p

and, then, just ssh [email protected]_host.

Know a better way?

If you can do better, submit your command here.

What others think

That command is awesome :)

Also i would add that you can not only ssh to "unreachable_host", but any other command, for example telnet.

Comment by slezhuk 246 weeks and 2 days ago

cool~!!! i like it~~

Comment by byrgl5 185 weeks and 4 days ago

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Comment by chanyuan 14 weeks and 2 days ago

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