Hi, When using ssh, from the debug info we can see the supported key exchange methods e.g. diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 from server and client. The first matched method from both sides will be used. But in ssh_config and sshd_config, there's no option for choose the kex method. I can only find the option like -c -m for cipher_spec and mac_spec. Could you tell me how to enforce to use one method e.g. diffie-hellman-group14-sha1 and how to verify if it is used successfully? Thanks in advance, Isaac