I had regular sftp Backups configured for my R80.10 CP Gateways which were working as expecting.. due to a recent vulnerability remediation i changed the sshd_config file to disable weak ciphers. The Backups continued to work fine until after 1 week they stopped suddenly.
Now when i am trying to ssh backup server from CP CLI i am getting a message "no kex alg found" ..there seems to be no change at server end.
How can i rectify this ? is this something to do with sshd_config
i edited the sshd conf file to include the following