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I am trying to copy files from a remote server to my local server, however, my remote server first requires me to connect to an intermediate host and then leapfrog onto the actual server from there. I am wondering how would I go about copying files from my remote server to my local machine with the scp command using this leapfrogging technique?

So first I have to connect to intermediate server, then from there I want to connect to my actual server.

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You can do this by editing your ssh configuration to include a proxy. scp uses ssh for remote connections so just editing the ssh config should work. Use your "intermediate server" as the proxy.

Add something like this to your ~/.ssh/config file:

Host target.machine
  User          targetuser
  HostName      target.machine
  ProxyCommand  ssh proxyuser@proxy.machine nc %h %p 2> /dev/null

Then just use scp as if you are connecting directly to the remote server.

To give credit where it's due, I took this from here.

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With modern versions of ssh this is very easy using the concept of a ProxyJump at least if you have keys set up.

Let us call the 3 machines L, I, and R (for local, intermediate, and remote). Assume to start with that the usernames are all the same.

The command required is then

scp -oProxyJump=I R:remote_file localfile

If the usernames are different then replace I with user@I and R with user@R.

If you are using ssh, the command would be:

ssh -J [user@]I [user@]R 
  • The configuration parameter is named ProxyJump and is invoked when using 'ssh' by the -J [<user>@]<destination> flag. The scp command is slightly differnet, as it makes use of the -oProxyJump=[<user>@]<destination> syntax. Or at least that's what happens (and what the manual pages say) on the two machines where I tested this solution... – Thomas N Nov 19 '19 at 19:52
  • So JumpProxy does not work (gives error: bad configuration option jump proxy). So do I just switch JumpProxy with ProxyJump? – skidjoe Nov 19 '19 at 19:54
  • @skidjoe That would be it... I edited the earlier answer, so hopefully it will be corrected. – Thomas N Nov 19 '19 at 19:59
  • Thanks for your answer, if I'm looking to download a whole file/folder, do I just add -r before the R:remote_file or right after the scp? – skidjoe Nov 19 '19 at 20:06
  • I would use it right after the scp, just to make it more readable in your history (if you ever need to use it again...), so: scp -r -oProxyJump=I R:remote_dir ./local_dir – Thomas N Nov 19 '19 at 23:24

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