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    You are at:Home»General Articles»How to Enable HTTP/2.0 in Apache

    How to Enable HTTP/2.0 in Apache

    By RahulDecember 11, 20152 Mins Read

    HTTP/2 (HTTP/2.0) is the major upgrade over older version HTTP/1.1 protocol.HTTP/1 was released in 1997 and after a long time the HTTP/2 is released in 2015. HTTP/2 protocol is based on SPDY (generally known as speedy). Some of the key improvements of HTTP/2 are:

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    • Server push: Server will pro-actively sent components to clients, So clients doesn’t need to wait for sending requests to server.
    • Multiplexing: Reducing number of active connection by bundling multiple HTTP requests from client and sent to server.
    • Encryption: efficiently use to encryption with TLS protocol in HTTP/2 over HTTP/1.1.
    • HTTP header compression: Compressed headers will reduce the overhead of additional requests to web server.

    Enable HTTP2.0 in Apache

    This article will help you to enable HTTP/2.0 in Apache web server on CentOS / Red Hat/ Debian and Ubuntu systems.

    Install or Update Apache

    HTTP/2 protocol supported over Apache version >=2.4.17. So make sure that your Apache version supporting HTTP/2 protocol. If you have not installed Apache or using older version upgrade it first. Use the following commands to add PPA for installing latest Apache2 version on your Ubuntu system.

    $ sudo apt-get install python-software-properties
    $ sudo add-apt-repository ppa:ondrej/apache2
    $ sudo apt-get update
    $ sudo apt-get install apache2
    

    Verify Apache Version

    After successful installation of Apache2 web server on your system, make sure you have Apache >=2.4.17, Earlier version does not supports HTTP/2 protocol.

    $ apache2 -v
    
    Server version: Apache/2.4.17 (Ubuntu)
    Server built:   2015-11-05T00:00:00
    

    Enable HTTP/2 in Apache

    HTTP/2 protocol requires SSL/TLS virtual hosts. You can’t use HTTP/2 protocol without SSL/TLS enabled websites. Now edit your website VirtualHost and add http2 keyword in listen section.

    $ sudo a2enmod http2
    $ sudo service apache2 restart
    

    Verify HTTP/2

    Now configure a VirtualHost with SSL for your domain and use following online tool for testing HTTP/2 support on your website.

    https://tools.keycdn.com/http2-test

    Apache HTTP/2.0 HTTP2
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    View 4 Comments

    4 Comments

    1. James Kiarie on June 19, 2020 10:01 am

      Incomplete guide. You need to edit the virtual host file and then restart apache2.

      Reply
    2. dman101 on June 28, 2018 2:15 am

      Now edit your website VirtualHost and add http2 keyword in listen section.

      What kind of instruction is this? it’s useless

      Reply
      • Rahul K. on June 28, 2018 6:08 am

        Hi, Where we can write listen in Apache VirtualHost? I think listen is related to Nginx.

        Reply
    3. Anil on December 14, 2015 7:13 am

      Thanks for the info….

      Reply

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