[X2Go-User] No connetion after Update to Ubuntu 22.04 (Openssh)

[T. Wirth]

Hi,

 

with latest version of Ubuntu I'm getting an error when trying to connect
with windows x2go client to Ubuntu 22.04 machine (I think it's not so
relevant that it's ubuntu 22.04 but newer openssh version 8.9):

"kex error: no match for method kex algos:server
[Diffie-hellman-group-exchange-sha256], client
[curve255519-sha256 at libssh.org,ecdh-sha2-nistp256,Diffie-hellman-group14-sha
1,Diffie-hellman-group1-sha1]"

 

I have tried to adapt sshd_config via:

"HostKeyAlgorithms
ecdsa-sha2-nistp256-cert-v01 at openssh.com,ecdsa-sha2-nistp384-cert-v01 at openss
h.com,ecdsa-sha2-nistp521-cert-v01 at openssh.com,ssh-ed25519-cert-v01 at openssh.
com,ssh-rsa-cert-v01 at openssh.com,ssh-dss-cert-v01 at openssh.com,ecdsa-sha2-nis
tp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,ssh-rsa,ssh-dss"

 

After that I have restarted sshd service but that did not help.

 

I also tried:

HostKeyAlgorithms ssh-rsa,ssh-dss

PubkeyAcceptedKeyTypes ssh-rsa,ssh-dss

 

The error message is the same. So I assume that the error is not what the
message is telling me but I know that with some of the latest openssh
versions several other clients run into problems (putty latest versions
fixed it, jump desktop - setting PubkeyAcceptedKeyTypes=+ssh-rsa did work)

 

Any ideas?

 

 

 

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