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