Subject: Re: [X2Go-Dev] Bug#472: Debian now has diffie-hellman-group1-sha1 disabled

From: Mike Gabriel <[email-masked]>
Date: Sat, 11 Oct 2014 20:48:01 +0000

Control: severity -1 important

HI Alex (DEKKER), hi Alex (Schneyder),

On  Sa 11 Okt 2014 13:07:00 CEST, Alex DEKKER wrote:

> As of Version: 1:6.7p1-1 of openssh-server, it appears that Debian  
> [and presumably upstream]'s sshd now has diffie-hellman-group1-sha1  
> disabled. This means that connections from x2goclient will fail.
>
> I was able to work around this by adding:
>
> KexAlgorithms  
> [email-masked],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
>
> to /etc/ssh/sshd_config, but obviously at some point support for  
> diffie-hellman-group1-sha1 is going to go away completely, rather  
> than just being disabled by default.

Thanks for bringing this up. Did not realize so far.

@Alex Schneyder: do you think you can find a fix for this. This  
actually is a release blocker of 4.0.3.0... And it endangers the  
status of X2Go Client in Debian, as well.

Mike

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