Problem Enabling Browser Caching

Do you have any caching plugin installed with your wordpress installation ? plugins like W3Total Cache can fulfill your requirements.

 

is mod_deflate installed on your system
verify via command line

httpd -t -D DUMP_MODULES | grep deflate_module
ea-apache24-mod_deflate
if its not installed
for EA4
yum install ea-apache24-mod_deflate

if still using EA3
use easyapache

 

As noted above, you may have some other issues, but if you get to the point of implementing browser-caching, and want to do it globally for all accounts on your server, I have had good luck with adding the following to WHM -> Service Configuration -> Apache Configuration -> Include Editor -> Pre VirtualHost Include -> All Versions:

Code:

## Cache-Control
<IfModule mod_headers.c>
  # 1 YEAR
  <FilesMatch "\.(flv|ico|pdf|avi|mov|ppt|doc|mp3|wmv|wav|jpg|jpeg|png|gif|swf)$">
    Header set Cache-Control "max-age=29030400, public"
  </FilesMatch>
</IfModule>

Note that the above doesn't cache *.js, *.css, and *.php files, which may change frequently as sites are developed.

While you're in there, you might also want to enable Gzip compression:

Code:

# Enable GZIP Compression.
<IfModule mod_deflate.c>
    SetOutputFilter DEFLATE
    <IfModule mod_setenvif.c>
        # Netscape 4.x has some problems...
        BrowserMatch ^Mozilla/4 gzip-only-text/html
       
        # Netscape 4.06-4.08 have some more problems
        BrowserMatch ^Mozilla/4\.0[678] no-gzip
       
        # MSIE masquerades as Netscape, but it is fine
        # BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
       
        # NOTE: Due to a bug in mod_setenvif up to Apache 2.0.48
        # the above regex won't work. You can use the following
        # workaround to get the desired effect:
        BrowserMatch \bMSI[E] !no-gzip !gzip-only-text/html
       
        # Don't compress images
        SetEnvIfNoCase Request_URI .(?:gif|jpe?g|png)$ no-gzip dont-vary
    </IfModule>
   
    <IfModule mod_headers.c>
        # Make sure proxies don't deliver the wrong content
        Header append Vary User-Agent env=!dont-vary
    </IfModule>
</IfModule>

and also tweak your security:

Code:

<IfModule mod_headers.c>
  # This setup will give you a "B" on observatory.mozilla.org. To do better, you need to add "Header set Content-Security-Policy", which WP Super Cache breaks.
  # Block site from being framed
  Header always append X-Frame-Options SAMEORIGIN
  # Block pages from loading when they detect reflected XSS attacks in older browsers.
  Header set X-XSS-Protection "1; mode=block"
</IfModule>