Configures openssl protocol to restrict the use of certain protocols before establishing an encrypted SSL connection. The protocol list consists of one or more openssl protocol strings separated by colons. Note that all cipher strings are case insensitive.
The default value is:
That means: TLS v1.0, TLS v1.1 and TLS v1.2 are enabled(SSL v2.0 and SSLv3.0 are disabled).
This setting applies to both agent and client.
If it is set on both side, the OpenSSL protocol negotiation rule will be followed.