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

[jmmec2014 at yahoo.com]

Thanks Mihai for the info.
I don't know why Windows 8.1 was suddenly only supporting ssh-ed25519 and failing to connect to my Linux Mint session with that "kex error".  What is even stranger:  the problem suddenly went away and I could once again use the x2go client to connect to that session (the same session that I've had running for more than a month - maybe two months by now).  At least for now the "kex error" is gone with the X2GO client.  

Thanks for explaining why Pyhoca was working.  It is good to know that both clients use different ssh libraries in case this problem strikes again.

      From: Mihai Moldovan <ionic at ionic.de>
 To: jmmec2014 at yahoo.com; "x2go-user at lists.x2go.org" <x2go-user at lists.x2go.org> 
 Sent: Thursday, February 23, 2017 5:35 AM
 Subject: Re: [X2Go-User] X2Go Client: Kex error : no match for method server host key alog: server [ssh-rsa], client [ssh-ed25519]
   
On 14.02.2017 07:30 PM, jmmec2014 at yahoo.com wrote:
> Kex error : no match for method server host key alog: server [ssh-rsa], client
> [ssh-ed25519].

This is odd. Karl's suggestion won't help, as this is not related to kex algorithms.

Instead, your server provides an RSA host key, but the client (in this case
libssh for X2Go Client) seems to support ssh-ed25519 only.

Odd, because libssh certainly does support RSA keys. Did you generate the server
host keys yourself? Maybe it's too big?

libssh definitely supports RSA keys and it should report that its list as well.


---

You're not seeing this issue with PyHoca, because PyHoca uses Paramiko, an
implementation of SSH in python. The supported features differ based upon the
implementation, as you can see (libssh vs. Paramiko in this case.)



Mihai



   
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