| 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 | |
| --- | |
| 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. |