1 Short: 1 2 Long: tlsv1 3 Tags: Versions 4 Protocols: SSL 5 Added: 6 Mutexed: tlsv1.1 tlsv1.2 tlsv1.3 7 Requires: TLS 8 See-also: http1.1 http2 9 Help: Use TLSv1.0 or greater 10 --- 11 Tells curl to use at least TLS version 1.x when negotiating with a remote TLS 12 server. That means TLS version 1.0 or higher 13