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How to enable gzip compression in Apache on Plesk server?

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Denis Bykov
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Applicable to:

  • Plesk for Linux

Question

How to enable gzip compression in Apache?

Answer

Using Plesk interface

  1. Make sure that 'deflate' module is present and enabled in Tools & Settings > Apache Web Server. For Apache 2.4 version, on CentOS 7, Ubuntu 14/16, Debian 7/8/9, 'filter' module should be also enabled.

    Untitled.png

  2. Open the .htaccess file for the website via Plesk File Manager on the required domain and add the following content into it:

    CONFIG_TEXT: <IfModule mod_deflate.c>
    AddOutputFilterByType DEFLATE application/javascript
    AddOutputFilterByType DEFLATE application/rss+xml
    AddOutputFilterByType DEFLATE application/vnd.ms-fontobject
    AddOutputFilterByType DEFLATE application/x-font
    AddOutputFilterByType DEFLATE application/x-font-opentype
    AddOutputFilterByType DEFLATE application/x-font-otf
    AddOutputFilterByType DEFLATE application/x-font-truetype
    AddOutputFilterByType DEFLATE application/x-font-ttf
    AddOutputFilterByType DEFLATE application/x-javascript
    AddOutputFilterByType DEFLATE application/xhtml+xml
    AddOutputFilterByType DEFLATE application/xml
    AddOutputFilterByType DEFLATE font/opentype
    AddOutputFilterByType DEFLATE font/otf
    AddOutputFilterByType DEFLATE font/ttf
    AddOutputFilterByType DEFLATE image/svg+xml
    AddOutputFilterByType DEFLATE image/x-icon
    AddOutputFilterByType DEFLATE text/css
    AddOutputFilterByType DEFLATE text/html
    AddOutputFilterByType DEFLATE text/javascript
    AddOutputFilterByType DEFLATE text/plain
    AddOutputFilterByType DEFLATE text/xml

    BrowserMatch ^Mozilla/4 gzip-only-text/html
    BrowserMatch ^Mozilla/4\.0[678] no-gzip
    BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
    Header append Vary User-Agent
    </IfModule> 

        Untitled.png

Enable gzip server wide using SSH connection

  1. Make sure that module mod_deflate is enabled in apache:

    # httpd -M | grep deflate
    deflate_module (shared)

  2. Create a file deflate.conf in /etc/httpd/conf.d:

    # vi /etc/httpd/conf.d/deflate.conf

  3. Add the following into the file:

    CONFIG_TEXT: <IfModule mod_deflate.c>
    # Compress HTML, CSS, JavaScript, Text, XML and fonts AddOutputFilterByType DEFLATE application/javascript
    AddOutputFilterByType DEFLATE application/rss+xml
    AddOutputFilterByType DEFLATE application/vnd.ms-fontobject
    AddOutputFilterByType DEFLATE application/x-font
    AddOutputFilterByType DEFLATE application/x-font-opentype
    AddOutputFilterByType DEFLATE application/x-font-otf
    AddOutputFilterByType DEFLATE application/x-font-truetype
    AddOutputFilterByType DEFLATE application/x-font-ttf
    AddOutputFilterByType DEFLATE application/x-javascript
    AddOutputFilterByType DEFLATE application/xhtml+xml
    AddOutputFilterByType DEFLATE application/xml
    AddOutputFilterByType DEFLATE font/opentype
    AddOutputFilterByType DEFLATE font/otf
    AddOutputFilterByType DEFLATE font/ttf
    AddOutputFilterByType DEFLATE image/svg+xml
    AddOutputFilterByType DEFLATE image/x-icon
    AddOutputFilterByType DEFLATE text/css
    AddOutputFilterByType DEFLATE text/html
    AddOutputFilterByType DEFLATE text/javascript
    AddOutputFilterByType DEFLATE text/plain
    AddOutputFilterByType DEFLATE text/xml
    # Remove browser bugs (only needed for really old browsers)
    BrowserMatch ^Mozilla/4 gzip-only-text/html
    BrowserMatch ^Mozilla/4.0[678] no-gzip
    BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
    Header append Vary User-Agent
    </IfModule>

  4. Note if the server has Apache 2.4 (httpd-2.4), the following module should be enabled:

    # grep -ir "mod_filter.so" /etc/httpd/conf.modules.d/00-base.conf
    LoadModule filter_module modules/mod_filter.so

  5. Restart apache:

    # service httpd restart

Note: On Debian and Ubuntu the service is named apache2 instead of httpd, the list of all modules is called using apache2ctl utility and the path for deflate.conf file is /etc/apache2/mods-available/ instead of /etc/httpd/conf.d/

Comments

3 comments

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  • Avatar
    Mattia Gregolin

    Thank you. This was very helpful for my Amazon Ec2 instance!

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  • Avatar
    Deyvi Arellano

    Disculpa pero cuando realizo lo siguiente me deja de funcionar apache! 

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  • Avatar
    Alexandr Tumanov

    @Deyvi,

    Could you please share the information about the error? Apache version? The article was verified and no errors with apache were found.

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