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

From: Oleksandr Shneyder <[email-masked]>
Date: Mon, 13 Oct 2014 15:34:16 +0200

And why is it a problem for X2Go? Is libssh not working any more? Then
it should be fixed in libssh, not in x2go?

Am 11.10.2014 22:48, schrieb Mike Gabriel:
> 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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