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curl/docs/cmdline-opts/tls-max.d

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+Long: tls-max
+Arg: <VERSION>
+Tags: Versions
+Protocols: SSL
+Added: 7.54.0
+Requires: TLS
+See-also: tlsv1.0 tlsv1.1 tlsv1.2 tlsv1.3
+Help: Set maximum allowed TLS version
+Category: tls
+---
+VERSION defines maximum supported TLS version. The minimum acceptable version
+is set by tlsv1.0, tlsv1.1, tlsv1.2 or tlsv1.3.
+
+If the connection is done without TLS, this option has no effect. This
+includes QUIC-using (HTTP/3) transfers.
+
+.RS
+.IP "default"
+Use up to recommended TLS version.
+.IP "1.0"
+Use up to TLSv1.0.
+.IP "1.1"
+Use up to TLSv1.1.
+.IP "1.2"
+Use up to TLSv1.2.
+.IP "1.3"
+Use up to TLSv1.3.
+.RE