Couldn't agree a key exchange algorithm (available: ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group14-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512)

[skull-Atul]

Hi Harry,

Thank you for your great work.

after applying these rules on RHEL 8.2 some of the users not able to connect SFTP server, as they are using the old ssh key exchange algorithm. I figured out the solution to update the SFTP client, but if you can please help me to know which algorithm is disabled or remove after applying the script?

User is getting the below error.

"Couldn't agree a key exchange algorithm (available: ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group14-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512)"