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SSH Proxy

I recently found a really neat configuration option for ssh if you need to ssh into a box say behind a NAT box. What this does is lets you ssh into an intermediate box and then ssh through that onto another. Place the following in your ~/.ssh/config:

Host fakednsname
  User targetusername
  ProxyCommand ssh proxyusername@proxyurl nc %h %p 2> /dev/null
You then type “ssh fakednsname” and you ssh through the proxy. This would be like if you did a “ssh proxyusername@proxyurl” followed by a “ssh targetusername@” on the proxy. Of course and proxyurl can be any ip address or url. This can also be used with scp or rsync.
Hope that helps!

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