Exception:Server does not support diffie-hellman-group1-sha1 for keyexchange

Discussion of open issues, suggestions and bugs regarding database management and administration tools for MySQL
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idem84
Posts: 51
Joined: Thu 04 Apr 2013 19:12

Exception:Server does not support diffie-hellman-group1-sha1 for keyexchange

Post by idem84 » Fri 12 Jun 2015 16:48

I upgraded openssh server used for connection auth (by ssh password).
The new OpenSSH 6.7 only understands diffie-hellman-group1-sha14

Exception:
Can't connect to SSH server on '187.216.##.###':
Server does not support diffie-hellman-group1-sha1 for keyexchange

Im uderstand that dbforge for mysql uses the algorithm diffie-hellman-group1-sha1, but new ssh server version only accept diffie-hellman-group1-sha14
The problem occurs on hosts which have been updated to OpenSSH 6.7+

Any workaround?
Thanks in advance!

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 will fail.
At some point support for diffie-hellman-group1-sha1 is going to go away completely, rather than
just being disabled by default.
Last edited by idem84 on Mon 15 Jun 2015 22:32, edited 1 time in total.

alexa

Re: Exception:Server does not support diffie-hellman-group1-sha1 for keyexchange

Post by alexa » Mon 15 Jun 2015 10:51

Unfortunately, diffie-hellman-group1-sha1 is not supported in dbForge Studio for MySQL. We are planning to support it in one of the next product versions.

As a workaround, you can specify the following in the sshd_config file and restart sshd:

Code: Select all

KexAlgorithms diffie-hellman-group1-sha1,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1

mirko.seifert
Posts: 2
Joined: Fri 13 Nov 2015 08:42

Re: Exception:Server does not support diffie-hellman-group1-sha1 for keyexchange

Post by mirko.seifert » Fri 13 Nov 2015 08:44

I have the same problem and this is quite bad as all of the servers I'm connecting to were updated Debian 8. So essentially I cannot use dbForge Studio at all anymore. I also cannot change the server configuration. Are there any concrete plans when this will be supported and available as an update?

alexa

Re: Exception:Server does not support diffie-hellman-group1-sha1 for keyexchange

Post by alexa » Fri 13 Nov 2015 11:59

This will be supported in the next version of dbForge Studio for MySQL (v7.0) that we are going to start working on next month.

Also, the new version will include the new feature Data Generator.

mirko.seifert
Posts: 2
Joined: Fri 13 Nov 2015 08:42

Re: Exception:Server does not support diffie-hellman-group1-sha1 for keyexchange

Post by mirko.seifert » Thu 26 Nov 2015 07:38

Can you say when this next version will be available?

alexa

Re: Exception:Server does not support diffie-hellman-group1-sha1 for keyexchange

Post by alexa » Thu 26 Nov 2015 17:03

Sorry for the delay on this.

It should be released in about two weeks.

William008
Posts: 1
Joined: Fri 19 Feb 2016 04:52

Re: Exception:Server does not support diffie-hellman-group1-sha1 for keyexchange

Post by William008 » Fri 19 Feb 2016 04:57

We have exactly the same issue which is quite bad since every one of the machines I am hooking up for you to had been up to date Debian 8. Thus in essence My partner and i cannot make use of dbForge Facility at all nowadays. My partner and i in addition cannot adjust the server setting. Cautious concrete floor options whenever this is backed and also offered being an update?






_____________________________________________________________________________
yahya Noor

alexa

Re: Exception:Server does not support diffie-hellman-group1-sha1 for keyexchange

Post by alexa » Fri 19 Feb 2016 13:22

The tool is currently being on the accepted testing stage. We're not going to release the tool until it is properly tested. We'll release the tool at the end of the next week.

alexa

Re: Exception:Server does not support diffie-hellman-group1-sha1 for keyexchange

Post by alexa » Fri 26 Feb 2016 12:27

We would like to let you know that dbForge Studio for MySQL, v7.0, where this issue is fixed, is available for downloading https://www.devart.com/dbforge/mysql/st ... nload.html

Thank you for your help in improving dbForge Studio for MySQL.

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