enable diffie-hellman-group1-sha1 on Jessie

It seems that in Debian 8 (OpenSSH 6.7), diffie-Hellman-group1-sha1 is disabled by default.
A client that connects via SSH receive the error:

I tried adding

Code:

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

to sshd_config but the problem persists.

Any help is welcome.
Thanks.

 

Same question here, anyone?

 

This can be caused becuase in some Linux distributions, /etc/ssh/sshd_conf is missing the KexAlgorithms and Cipher fields to describe which methods are supported by the SSH daemon. Please try to add this inside the conf:

Code:

KexAlgorithms diffie-hellman-group1-sha1,[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1
Ciphers 3des-cbc,blowfish-cbc,aes128-cbc,aes128-ctr,aes256-ctr

After saving, regenerate the keys:

Code:

"ssh-keygen -A"

Then restart SSH service.
Give me an output if this will work

 

It works, after a restart of the sshd. Thanks!

P.S. I made an account here just to let you know.

 

Great to know! Tell me if you need any more help.