1--- 2c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 3SPDX-License-Identifier: curl 4Long: no-alpn 5Tags: HTTP/2 6Protocols: HTTPS 7Added: 7.36.0 8Requires: TLS 9Help: Disable the ALPN TLS extension 10Category: tls http 11Multi: boolean 12See-also: 13 - no-npn 14 - http2 15Example: 16 - --no-alpn $URL 17--- 18 19# `--no-alpn` 20 21Disable the ALPN TLS extension. ALPN is enabled by default if libcurl was built 22with an SSL library that supports ALPN. ALPN is used by a libcurl that supports 23HTTP/2 to negotiate HTTP/2 support with the server during https sessions. 24 25Note that this is the negated option name documented. You can use --alpn to 26enable ALPN. 27