[X2Go-User] X2Go Client: Kex error : no match for method server host key alog: server [ssh-rsa], client [ssh-ed25519]

[KARL A. WOELFER]

Hello -


Here is a link with some background, which describes two workarounds :

http://permalink.gmane.org/gmane.linux.terminal-server.x2go.user/2368


You would add this to your sshd_config file on the client (Linux) machine, then restart ssh

#  KexAlgorithms
curve25519-sha256 at libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1


I hope this helps.

- Karl


________________________________
De : x2go-user-bounces at lists.x2go.org <x2go-user-bounces at lists.x2go.org> de la part de jmmec2014 at yahoo.com <jmmec2014 at yahoo.com>
Envoyé : mardi 14 février 2017 10:30:43
À : x2go-user at lists.x2go.org
Objet : [X2Go-User] X2Go Client: Kex error : no match for method server host key alog: server [ssh-rsa], client [ssh-ed25519]

Hey everyone,

Any advice on the problem below?  I hit it consistently with X2Go Client, but it does not happen with the Pyhoca client.

Error:

Kex error : no match for method server host key alog: server [ssh-rsa], client [ssh-ed25519].

Client computer:

* Windows 8.1 connecting to Linux Mint 17.1 (Ubuntu 14.04.1) running the MATE desktop.

* X2Go client software v4.0.5.2.  The problem does not happen with the Pyhoca software (I downloaded the latest version).

Server:

Linux Mint 17.1 (Ubuntu 14.04.1) running the MATE desktop.

X2Go Server:
     Server Core:
        x2goserver (4.0.1.19)
        x2goagent (3.5.0.31)

    Server Extensions:
        x2goserver-extensions (4.0.1.19)
        x2goserver-xsession (4.0.1.19)

X2Go Server Add-ons:
        x2gomatebindings (0.0.1.3)

X2Go Server Features:
        X2GO_CLIPBOARD_MODES
        X2GO_LIST_DESKTOPS
        X2GO_MATEBINDINGS
        X2GO_MOUNTDIRS
        X2GO_MOUNT_UNCPATHS
        X2GO_PUBLISHED_APPLICATIONS
        X2GO_RUN_EXTENSIONS
        X2GO_SERVERSIDE_DESKTOPCOMMANDS
        X2GO_SET_KEYBOARD
        X2GO_UMOUNTSESSION_ALL
        X2GO_UMOUNTSESSION_ONLYPATH
        X2GO_XSESSION

Additional Information:

Usually I use X2Go without ssh keys, so just type in my userid & password when connecting to the Linux desktop.   This has worked fine.

When the problem above started to happen, I tried generating RSA keys on my Windows machine and transferred them to my Linux machine, but this didn't help.  I also tried with DSA and also ED22519 keys, but no-go on X2Go.

I installed Pyhoca and authenticate using my userid & password.  I can then connect to the suspended session that was originally created with the X2Go client.

For now I am using the Pyhoca client, but would also like to get the X2Go client working again.

Thanks!

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