Solution to SSH Unable to negotiate with no matching key exchange method error

If you receive the "Unable to negotiate with no matching key exchange method" error when accessing your server via SSH, this is because the connection encryption of the SSH service on the server is not introduced on the connecting server.

To solve the error, you can use the following command after accessing your server with the console.

ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 [email protected] -p22

Specifying the port with -p at the end of the command is optional. If the SSH service port of the server you will connect to is 22 by default, you do not need to type it.