How to enable leverage browser caching for Apache in Plesk

1. Enable mod_expires: Plesk > Tools & Settings > Apache Web Server, tick expires > OK
2. Go to Subscriptions > example.com > Apache & nginx Settings, add below to Additional directives for HTTP and Additional directives for HTTPS sections:

   <IfModule mod_expires.c>
   ExpiresActive On
   FileETag None
   ExpiresDefault "access plus 14 days"
   ExpiresByType image/jpg "access plus 1 month"
   ExpiresByType image/gif "access plus 1 month"
   ExpiresByType image/jpeg "access plus 1 month"
   ExpiresByType image/png "access plus 1 month"
   ExpiresByType text/css "access plus 1 month"
   ExpiresByType application/pdf "access plus 1 month"
   ExpiresByType text/javascript "access plus 1 month"
   ExpiresByType text/x-javascript "access plus 1 month"
   ExpiresByType application/javascript "access plus 1 month"
   ExpiresByType application/x-shockwave-flash "access plus 1 month"
   ExpiresByType text/css "now plus 1 month"
   ExpiresByType image/ico "access plus 1 month"
   ExpiresByType image/x-icon "access plus 1 month"
   ExpiresByType text/html "access plus 1 days"
   </IfModule>

First of all, connect to the server using SSH.

For RHEL-based operating systems (CentOS, RHEL, CloudLinux, Virtuozzo Linux 7)

1. Comment the line LoadModule expires_module modules/mod_expires.so in the file /etc/httpd/conf.modules.d/00-base.conf.

2. Create the configuration file /etc/httpd/conf.d/expires.conf:

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

3. Insert the following content in it:

   LoadModule expires_module modules/mod_expires.so
   ExpiresActive on
   ExpiresDefault "access plus 14 days"
   ExpiresByType image/jpg "access plus 1 month"
   ExpiresByType image/gif "access plus 1 month"
   ExpiresByType image/jpeg "access plus 1 month"
   ExpiresByType image/png "access plus 1 month"
   ExpiresByType text/css "access plus 1 month"
   ExpiresByType application/pdf "access plus 1 month"
   ExpiresByType text/javascript "access plus 1 month"
   ExpiresByType text/x-javascript "access plus 1 month"
   ExpiresByType application/javascript "access plus 1 month"
   ExpiresByType application/x-shockwave-flash "access plus 1 month"
   ExpiresByType text/css "now plus 1 month"
   ExpiresByType image/ico "access plus 1 month"
   ExpiresByType image/x-icon "access plus 1 month"
   ExpiresByType text/html "access plus 1 days"

4. Add the following line to the file /etc/httpd/conf/httpd.conf:

   FileETag None

5. Apply the configuration changes:

   # service httpd reload

6. Validate the Apache configuration:

   # httpd -t
   Syntax OK

7. Check that the module is loaded:

   # httpd -M | grep expires
   expires_module (shared)

For Debian and Ubuntu

1. Add the following content into the file /etc/apache2/mods-available/expires.load:

   ExpiresActive on
   ExpiresDefault "access plus 14 days"
   ExpiresByType image/jpg "access plus 1 month"
   ExpiresByType image/gif "access plus 1 month"
   ExpiresByType image/jpeg "access plus 1 month"
   ExpiresByType image/png "access plus 1 month"
   ExpiresByType text/css "access plus 1 month"
   ExpiresByType application/pdf "access plus 1 month"
   ExpiresByType text/javascript "access plus 1 month"
   ExpiresByType text/x-javascript "access plus 1 month"
   ExpiresByType application/javascript "access plus 1 month"
   ExpiresByType application/x-shockwave-flash "access plus 1 month"
   ExpiresByType text/css "now plus 1 month"
   ExpiresByType image/ico "access plus 1 month"
   ExpiresByType image/x-icon "access plus 1 month"
   ExpiresByType text/html "access plus 1 days"

2. Make a symbolic link to that file in the directory /etc/apache2/mods-enabled/:

   # cd /etc/apache2/mods-enabled/ && ln -s ../mods-available/expires.load expires.load

3. Add the following line to the…