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