Short: 3 Long: sslv3 Tags: Versions Protocols: SSL Added: Mutexed: sslv2 tlsv1 tlsv1.1 tlsv1.2 Requires: TLS See-also: http1.1 http2 Help: Use SSLv3 --- Forces curl to use SSL version 3 when negotiating with a remote SSL server. Sometimes curl is built without SSLv3 support. SSLv3 is widely considered insecure (see RFC 7568).