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ssh through a bastion

From: Garjola Dindi
Subject: ssh through a bastion
Date: Sat, 01 Feb 2020 13:04:14 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux)


I am using tramp to ssh to a cluster which uses a bastion (I think this
is the name for this thing!). Usually, to connect to the cluster, I do

ssh user@cluster

I asks for a password, and presents a curses menu to select the type of
node (after a timeout it will select a default option). After that, it
asks again for the password and connects to a node of the cluster. In
the case of scp, there is no curses menu, but I still have to enter the
password twice.

I can use tramp without problem, since the timeout will select the
default node, which is OK for me.

However, I have to enter the password twice, which is inconvenient.
Also, from time to time, it will ask for the password again (and twice
every time).

I thought that using the .authinfo file I would not need to enter the
password, but it still asks for it (but only once). I think this is
different from the multi-hop that I have read in the manual, since the
second connection does not ask for a login (it is the same as the one of
the bastion) and I don't get to choose the machine (cluster node) to
which I am connecting.

Is there a way to avoid to manually entering the password in this kind
of situation?

I hope my description above is not too vague and someone can help me.

Thank you.


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