[X2Go-User] X2Go client Authentication Issue

[Stefan Baur]

Hi Dimitra,

Am 09.11.24 um 18:52 schrieb Dimitra Mitsoudi:

> I am using X2Go Client to enter a linux server using SSH key
> authentication. However, I encountered an issue where, after providing my
> SSH key passphrase and successfully logging in, I was prompted for a
> password once more. This second prompt seems unnecessary, as I am using
> key-based authentication that works flawlessly through the Command Prompt.
> SSH keys are for passwordless login in servers.
If you're being prompted for a password, it means that keyfile
authentication failed.

During installation of X2GoClient for Windows, you can select whether or
not a debug version of the client should be installed.
If you choose to install it, you can run

x2goclient.debug.exe --debug

in a command line window and watch the debug messages scroll by. I'm
pretty sure you'll see that your keyfile has been rejected - it might be
in the wrong format.

It's been a while since I last used the Windows client in conjunction
with keyfiles, but it might be that you need to convert the key into
PuTTY's PPK format. There's a tool for that named puttygen.exe that gets
installed alongside X2GoClient for Windows.
You could also try running pageant.exe (an SSH Key Agent for Windows),
loading your key into that (for that, it *must* be in PPK format), and
finally simply checking "Try auto login", without specifying a keyfile.

Kind Regards,
Stefan Baur

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