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| title | author | description | monikerRange | ms.author | ms.custom | ms.date | no-loc | uid | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Use HTTP/2 with the ASP.NET Core Kestrel web server | rick-anderson | Learn about using HTTP/2 with Kestrel, the cross-platform web server for ASP.NET Core. | >= aspnetcore-5.0 | riande | mvc | 05/04/2020 |
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fundamentals/servers/kestrel/http2 |
Use HTTP/2 with the ASP.NET Core Kestrel web server
HTTP/2 is available for ASP.NET Core apps if the following base requirements are met:
- Operating system†
- Windows Server 2016/Windows 10 or later‡
- Linux with OpenSSL 1.0.2 or later (for example, Ubuntu 16.04 or later)
- Target framework: .NET Core 2.2 or later
- Application-Layer Protocol Negotiation (ALPN) connection
- TLS 1.2 or later connection
†HTTP/2 will be supported on macOS in a future release. ‡Kestrel has limited support for HTTP/2 on Windows Server 2012 R2 and Windows 8.1. Support is limited because the list of supported TLS cipher suites available on these operating systems is limited. A certificate generated using an Elliptic Curve Digital Signature Algorithm (ECDSA) may be required to secure TLS connections.
If an HTTP/2 connection is established, HttpRequest.Protocol reports HTTP/2.
Starting with .NET Core 3.0, HTTP/2 is enabled by default. For more information on configuration, see the Kestrel HTTP/2 limits and ListenOptions.Protocols sections.
Advanced HTTP/2 features
Additional HTTP/2 features in Kestrel support gRPC, including support for response trailers and sending reset frames.