Is it possible to use a third computer to do authentication.
This is the scenario:
Computer1 wants an SSH connection to Computer2
What happens is:
Computer1 connects to Computer3, running OpenSSH.
Computer3 authenticates Computer1 and Computer 2.
The result is an SSH connection between 1 and 2 authenticated by 3.
Is this possible?
If so, how to set it up on Ubuntu?