=item SSL_OP_NO_SSLv2
Do not use the SSLv2 protocol.
+As of OpenSSL 1.0.2g the B<SSL_OP_NO_SSLv2> option is set by default.
=item SSL_OP_NO_SSLv3
Do not use the SSLv3 protocol.
+It is recommended that applications should set this option.
=item SSL_OP_NO_TLSv1
Do not use the TLSv1 protocol.
+=item SSL_OP_NO_TLSv1_1
+
+Do not use the TLSv1.1 protocol.
+
+=item SSL_OP_NO_TLSv1_2
+
+Do not use the TLSv1.2 protocol.
+
=item SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION
When performing renegotiation as a server, always start a new session