Re: Need Your Valuable Inputs for diffie-hellman-group14-sha256

[Andreas Schneider <asn@xxxxxxxxxxxxxx>]

On Friday, 31 January 2020 10:27:10 CET Zeev ? wrote:
>  Hi,
> There is a problem with SSH from newer systems to older ones (and vice
> versa), due to some SSH security levels incompatibility.During the next
> week, I'll provide more precise information regarding the problem. Thanks
> for your help

I've just set in the ssh client config:

Host foo
    KexAlgorithms diffie-hellman-group18-sha512

and if I connect to my server, this is the KEX algorithm which gets 
negotiated.

[2020/01/31 11:22:34.672120, 2] ssh_kex_select_methods:  Negotiated diffie-
hellman-group18-sha512,ssh-ed25519,aes256-gcm@xxxxxxxxxxx,aes256-
gcm@xxxxxxxxxxx,hmac-sha2-256-etm@xxxxxxxxxxx,hma
c-sha2-256-etm@xxxxxxxxxxx,none,none,,


As we try all combination, I wonder what is the SSH counter part you're trying 
to connect to which is failing ...


	Andreas

-- 
Andreas Schneider                 asn@xxxxxxxxxxxxxx
GPG-ID:     8DFF53E18F2ABC8D8F3C92237EE0FC4DCC014E3D