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- c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
- SPDX-License-Identifier: curl
- Long: no-npn
- Tags: Versions HTTP/2
- Protocols: HTTPS
- Added: 7.36.0
- Mutexed:
- See-also: no-alpn http2
- Requires: TLS
- Help: Disable the NPN TLS extension
- Category: tls http
- Example: --no-npn $URL
- Multi: boolean
- ---
- curl never uses NPN, this option has no effect (added in 7.86.0).
- Disable the NPN TLS extension. NPN is enabled by default if libcurl was built
- with an SSL library that supports NPN. NPN is used by a libcurl that supports
- HTTP/2 to negotiate HTTP/2 support with the server during https sessions.
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