SCP from one external server to another

Question

I am trying to use SCP on my local server to copy a file from one remote server to another remote server (both remote servers use a custom port (xxxx)

I am trying:

scp -r -P xxxx [email protected]:/home/myimages/images.tar.gz [email protected]:/home/myimages/images.tar.gz

But I get the following error:

ssh: connect to host xxx.xxx.xxx.222 port 22: Connection timed out

Any suggestions?

Answer 1

did you check that direct authentication works from first remote host to the second one?

scp user@host:/file user@otherhost:/otherfile is shorthand for

ssh user@host scp /file user@otherhost:/otherfile

which leeds me to think:

ssh -p XXX user@host scp -P XXX /file user@otherhost:/otherfile might work.

Answer 2

It seems like scp doesn't realize that the special port should also be used on the second server. You could try to explicitly call ssh to start the remote scp transfer:

ssh -P xxxx user@host scp -P xxxx /file user@otherhost:/otherfile

Answer 3

Define the servers in your .ssh/config file, for example:

Host foobar
User youruser
Port 2222
Hostname the.real.hostname

Host foobar2
User youruser
Port 2222
Hostname the2.real.hostname

You can then simply do:

scp foobar:file foobar2:

and it will use the defined custom ports.

Answer 4

I've got remote servers that cannot see each other, but my local server can see both. The ssh daemon in the remote servers are listening in different non-standard ssh ports. This is how I get this done:

ssh -p 111 userA@remote1 'cat myfile' | ssh -p 222 userB@remote2 'cat - > myfile'

The second ssh command asks for the password first, then remote1 asks for password for userA. You may have this automated if you have set up ssh authorized keys, which is not the case in my environment.