Cipher Suites Supported by Security Cloud Control's Secure Device Connector
Security Cloud Control's Secure Device Connector uses node.js which only accepts the latest and most secure ciphers. As a result, Security Cloud Control's SDC only supports this list of ciphers:
ECDHE-RSA-AES128-GCM-SHA256
ECDHE-ECDSA-AES128-GCM-SHA256
ECDHE-RSA-AES256-GCM-SHA384
ECDHE-ECDSA-AES256-GCM-SHA384
DHE-RSA-AES128-GCM-SHA256
ECDHE-RSA-AES128-SHA256
DHE-RSA-AES128-SHA256
ECDHE-RSA-AES256-SHA384
DHE-RSA-AES256-SHA384
ECDHE-RSA-AES256-SHA256
DHE-RSA-AES256-SHA256
If the cipher suite you use on your ASA is not in this list, SDC does not support it and you will need to Updating your ASA's Cipher Suite.