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