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I am unable to ssh to a server that asks for a diffie-hellman-group1-sha1
key exchange method:
How to enable the diffie-hellman-group1-sha1
key exchange method on Debian 8.0?
I have tried (as proposed here) to
add the following lines to my /etc/ssh/ssh_config
regenerate keys with
restart ssh with
but still get the error.
The OpenSSH website has a page dedicated to legacy issues such as this one. It suggests the following approach, on the client:
or more permanently, adding
to ~/.ssh/config
.
This will enable the old algorithms on the client, allowing it to connect to the server.
Stephen KittI tried this solution, but my problem was that I had many (legacy) clients connecting to my recently upgraded server (ubuntu 14 -> ubuntu 16).
The change from openssh6 -> openssh7 disabled by default the diffie-hellman-group1-sha1
key exchange method.
After reading this and this I came up with the changes I needed to do to the /etc/ssh/sshd_config
file:
But a more wide legacy set of changes is (taken from here)
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