To backup configuration to a SFTP repository the following encryption methods are supported by OpenSSL client / DNAC appliance:
ecdh-sha2-nistp256
ecdh-sha2-nistp384
ecdh-sha2-nistp521
diffie-hellman-group14-sha1
Legacy/less secure encryption methods are not supported.
Ensure that the SFTP host support the DNAC encryption methods for SSL handshake.
