Support for ECDHE ciphers was introduced in SGOS 18.104.22.168. If your appliance is running a version earlier than SGOS 22.214.171.124, you can use TCP tunneling while intercepting to access websites that use ECDHE ciphers. Tunneling while intercepting also allows reporting of these types of calls.
Note: This article provides instructions for transparent deployments. For explicit deployments, refer to the Knowledge Base article Some HTTPS websites will not load using the ProxySG appliance.
To create a TCP tunnel while intercepting: