Configuration High SSLv2 is vulnerable to many known attacks that can affect user security. Support for SSLv2 should be disabled as it is obsolete. The Mozilla Server Side TLS configuration guide includes instructions for disabling SSLv2 in server configuration (see link below). It is likely that the HTTPS server must be restarted for configuration changes to take effect. Vega discovered support for SSLv2. SSLv2 is known to have many serious vulnerabilities and should not be supported or used. HTTPS (Wikipedia)