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Knowledge Base

How to enable gzip compression in Apache on Plesk server?

 
apachecentosdebiandomainsfile manager

Question

How to enable gzip compression in Apache?

Answer

Note: Since Plesk Obsidian 18.0.33 it is possible to use BROTLI compression which is considered to be better compression than GZIP.

Enabling per-domain using Plesk interface

Note: In case Smart static files processing is enabled in Domains > example.com > Apache & nginx Settings, disable it, or use the following article instead: How to enable gzip compression in nginx on a Plesk server

  1. Log into Plesk

  2. Make sure that 'deflate' and 'filter' modules ('filter' might be absent on CentOS 6) are enabled in Tools & Settings > Apache Web Server.

    Untitled.png

  3. Go to Domains > example.com > File Manager and open the .htaccess file.

  4. Add the following content to the bottom of the file:

    <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 server-wide gzip compression using SSH connection

Note: In case Smart static files processing is enabled on domain in Domains > example.com > Apache & nginx Settings, disable it, or use the following article instead: How to enable gzip compression in nginx on a Plesk server

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/

  1. Connect to the server via SSH

    Note: if direct SSH access to the server is not possible, contact server administrator for further assistance.

  2. Make sure that mod…

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