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How to enable HTTP/2

The LiteSpeed web server support HTTP/2 since enterprise version 5.0. HTTP/2 is enabled by default for SSL listener configured from httpd.conf. And it can be customized via “SpdyEnabled” directive.

SPDY is also enabled by default. However, enabling SPDY or HTTP/2 on backend LiteSpeed web server has no effect to end users if there is a front-end SSL proxy server and front-end SSL proxy is not capable of forwarding SPDY and HTTP/2 requests.

Also HTTP/2 requires openssl 1.0.2 as minimum. Openssl versions < 1.0.2 would force HTTP/2 connections to HTTP 1.

Although HTTP/2 specification does not require TLS, TLS is required by HTTP/2 browser implementations.

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  • Last modified: 2017/01/30 19:44
  • by Jackson Zhang