I can use the ssh configuration file to enable the forwarding of ssh keys added to ssh-agent. How can I do the same with gpg keys?
SSH is only capable of forwarding tcp connections within the tunnel.
You can, however, use a program like
Test if it works out with
Now hopefully all you need is a way to run all this automatically!
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I had to do the same, and based my script on the solution by b0fh, with a few tiny modifications: It traps exits and kills background processes, and it uses the "fork" and "reuseaddr" options to socat, which saves you the loop (and makes the background socat cleanly kill-able).
The whole thing sets up all forwards in one go, so it probably comes closer to an automated setup.
Note that on the remote host, you will need:
I believe there's also a solution that involves just one SSH command invocation (connecting back from the remote host to the local one) using