[X2go-User] Failure - Server Key

[Ivan Kabaivanov]

On Saturday 15 October 2011 20:40:53 CACook at quantum-sci.com wrote:
> Just reinstalled Debian on the backup server, but now can't get into it with
> x2go.  Gives a popup that says, "The host key for this server was not found
> but an othertype of key exists.An attacker might change the default server
> key toconfuse your client into thinking the key does not exist."
> 
> Doing a search, no one seems to have had this problem before.  Any ideas?


This happened to me.  Just a guess, have  you switched to newer openssh + 
openssl 1.x.x?  If so, openssh uses ecdsa-sha2-nistp256 keys by default, and 
x2go doesn't.  You can either disable ecdsa on the server, or delete the key 
from your known_hosts on the client, start x2goclient and it should pick the 
correct key.

IvanK.