Mike, On Wed, 10 Oct 2018, Mike via talk wrote:
... and not forgetting that Karen's DOS-based SSH client may not provide these UNIX-style openssh features and configuration niceties!
Well...just so! There might be an option somewhere in the <risk of misspelling> wat.pcp configurations used to be sure, but it might be simpler to incorporate the additional dh key options in the djpgg libraries too...not that I know how. Kare
On 10/10/18, Anthony de Boer via talk <talk@gtalug.org> wrote: Jason Shaw via talk wrote:
On Wed, Oct 10, 2018 at 3:06 PM Mike via talk <talk@gtalug.org> wrote:
That is, SSH to your other shell account, and instead of running your email program, run "ssh user@eugene...", and once connected to eugene, proceed as though you were connected directly.
This is a great recommendation and can be easily automated. In your personal ssh config, usually ~/.ssh/config you can add in:
Host *.dreamhost.com ProxyCommand ssh -q shellworld_host nc %h %p
Those suggestions are two very different things. Mike is suggesting SSH'ing to the shell on the intermediate box and then SSH'ing from it, while Jason is suggesting to SSH the intermediate and then use it to pipe an inner SSH connection through the outer SSH connection and emerge there for the onward hop to the destination.
Caveat for the first solution: it involves using your credentials on the intermediate box, so if anyone evil has compromised it they can now pop the destination box too.
Caveat for the second solution: the SSH conversation still involves the near-end client negotiating crypto with the far-end server, so if that started off being the problem it's still that problem. Also, the middle box might not have nc (netcat) installed but there are other tactics like LocalForward configuration that can do the same thing.
Such plumbing is often necessary for a variety of reasons. Just make sure you know where you are. The commands "whoami", and "hostname" are often useful!
Setting the bash prompt to include the hostname is helpful. Always pause a moment to be sure where you are before typing commands like reboot, poweroff, and such. I've even known people to alias away commands like that on shared servers after inadvertently using them a time too many thinking they were on their test rig.
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