Transferring files between servers on a private network?

[Steve Dondley]

OK, very good. Thanks so much for your help and time and giving me some
peace of mind.

I guess my next step is to now figure out how to get Rex (a tool for
running commands on a remote machine) to make ssh calls as a forwarding
agent. I'm pretty sure this can be done so I should be good.

On Wed, Dec 9, 2020 at 3:04 PM Brian Candler <b.candler at pobox.com> wrote:

> On 09/12/2020 19:49, Steve Dondley wrote:
> > Very interesting food for thought. So let me make sure I understand
> > what I need to do here as I try to reverse 2 decades of cluelessness
> > (I literally never heard of agent forwarding until last night):
> >
> > So I'll add the pem file with ssh-add on my local machine and then
> > I'll be able to log into C and then once in C I can run the scp
> > command to move files between B and A via the private network. Have I
> > got that right?
>
> Yep, as long as you've enabled agent forwarding (-A)  when you login to C.
>
> With agent forwarding, an agent socket appears on host C.  Any command
> you type there (such as "ssh B" or "scp B:foo A:bar") is able to talk to
> the agent socket, as if ssh-agent were running on host C.
>
> But in reality, the agent messages are passed back and forth over the
> ssh connection between your local host and C, to the ssh-agent running
> on your local host.  Hence your private key never leaves your local host.
>
>

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