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Knowledge Base

HTTP/2 Support in Plesk

 
administrator guideapache and nginx web servers linuxweb servershttphttp2

Overview

HTTP/2 (also known as HTTP/2.0 and HTTP 2.0) is the second major version
of the HTTP network protocol used by the World Wide Web. Ratified in May
2015, HTTP/2 was created to address some significant performance
problems with HTTP 1.1. The advantages of this protocol can be found
here. Currently HTTP/2
is supported by most major web browsers.

HTTP/2 support is available for Plesk customers starting from the
version 12.5.30 Update #28 and requires the latest version of nginx.

Note: HTTP/2 is supported for SSL sites only, so non-SSL sites will
continue to work under HTTP/1.x.

How to Enable HTTP/2 support for your web site

Make sure you have nginx web server updated to the latest version and
running. You can do this on the Tools & Settings -> Server
Components
and the Tools & Settings -> Services Management pages.

image 76462

image 76463

Login to your server via SSH under root and enable HTTP/2 support in
Plesk using the following command line utility:

# plesk bin http2_pref enable

During the last step your nginx web server will be tuned to use the TLS
protocol with modern and secure ciphers, the whole web server
configuration will be rebuilt, and all your and your customers’ web
sites with SSL support will be moved to HTTP/2.

Please check the output of the command for errors or warnings during
switching to HTTP/2. If there are any problems, refer to the
Troubleshooting section below.

Note: You can simply use an online service like
https://tools.keycdn.com/http2-test to check that HTTP/2 is enabled
on a domain.

If you wish…

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