On 29/04/2024 01:38, Jon Forrest wrote:
On 4/28/2024 2:54 AM, Ulrich Sibiller wrote:
Not directly, but libssh (partly) read your ssh config. So you can
add a host stanza with the settings for your destination host
there.
Are you quite sure?
It definitely reads it, I have something like:
Host xyz
HostName example.com
... other options ...
and I can tell X2Go to connect to host xyz. However, as Ulrich points
out X2Go doesn't handle the configuration in exactly the same way as
ssh, for example "Include" directives are handled slightly differently.
I think that the best approach with your problem is probably to use
ssh-agent and ControlPath directives. Then use your command-line ssh to
establish the connection and X2Go can hopefully make use of that, even
though you have such an extreme mismatch between ssh versions. You can
try something like the following in .ssh/config:
Host example.com
ControlPath /tmp/ssh-ctl-%l-%h-%p-%r
ControlMaster auto
ControlPersist 600
%C can be used in place of %l-%h-%p-%r, but the latter makes it easier
to see which control socket belongs to a particular connection. (Do 'man
ssh_config' for the full details on these directives.)
With the following in my ssh config file
Host example.com
PubkeyAcceptedAlgorithms +ssh-rsa
HostKeyAlgorithms=+ssh-rsa
I can run ssh on the command line successfully but trying to start an
x2go
session results in
kex error : no match for method server host key algo: server
[ssh-rsa,ssh-dss], client [rsa-sha2-512,rsa-sh
a2-256,ssh-ed25519,ecdsa-sha2-nistp521,ecdsa-sha2-nistp384,ecdsa-sha2-nistp256,sk-ssh-ed25...@openssh.com,s
k-ecdsa-sha2-nistp...@openssh.com]
Does x2go actually use the system ssh executable (e.g. /usr/bin/ssh)?
I'm pretty sure that it doesn't....
The reason I'm asking is because I did an experiment and renamed
ssh to xxx. I got the same result, shown above, when running the
x2goclient!
This was a surprise.
.... which explains what you observed here.
I hope that this helps,
Peter.
Thanks,
Jon
Jon Forrest <nob...@gmail.com <mailto:nob...@gmail.com>> schrieb am
Sa., 27. Apr. 2024, 20:30:
Due to reasons too sad to describe, I need to X2go from a modern
Fedora 40 system to a Ubuntu 10.04 (!) system.
Running ssh from the command line fails with the message
Unable to negotiate with XX.XX.XX.XX port 22: no matching host key
type found. Their offer: ssh-rsa,ssh-dss
After some work I got this to work by adding
-oHostKeyAlgorithms=+ssh-rsa -oPubkeyAcceptedAlgorithms=+ssh-rsa
to the ssh command line.
My question is how can I add these options to the ssh command that
X2go executes on the client?
Cordially, Jon Forrest
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