Reduce your server's bandwidth consumption with cPanel

For those that are interested, I manage a server running cPanel with over 200 accounts, on average we are using around 220GiB per month traffic server wide.

Turns out, that cPanel does not enable any form of HTTP compression for general requests, even though the WHM supports it, pretty dumb IMHO.

Anyway, here is how to turn it on... go to "Apache Configuration" and choose "Include Editor"
Select "All Versions" under "Pre Main Include"
Paste the following in:

AddType application/vnd.ms-word.document.macroEnabled.12 .docm
AddType application/vnd.openxmlformats-officedocument.wordprocessingml.document .docx
AddType application/vnd.ms-word.template.macroEnabled.12 .dotm
AddType application/vnd.openxmlformats-officedocument.wordprocessingml.template .dotx
AddType application/vnd.ms-powerpoint.slideshow.macroEnabled.12 .ppsm
AddType application/vnd.openxmlformats-officedocument.presentationml.slideshow .ppsx
AddType application/vnd.ms-powerpoint.presentation.macroEnabled.12 .pptm
AddType application/vnd.openxmlformats-officedocument.presentationml.presentation .pptx
AddType application/vnd.ms-excel.sheet.binary.macroEnabled.12 .xlsb
AddType application/vnd.ms-excel.sheet.macroEnabled.12 .xlsm
AddType application/vnd.openxmlformats-officedocument.spreadsheetml.sheet .xlsx
AddType application/vnd.ms-xpsdocument .xps

DeflateCompressionLevel 9
AddOutputFilterByType   DEFLATE text/html text/plain text/xml text/css text/javascript text/vbscript text/x-html text/iuls text/richtext text/scriptlet text/tab-separated-values text/webviewhtml text/x-component text/x-setext text/x-vcard application/x-javascript application/javascript image/bmp

<IfModule mod_expires.c>
    ExpiresActive on
    ExpiresDefault A600
    ExpiresByType image/gif "access plus 1 day"
    ExpiresByType image/jpeg "access plus 1 day"
    ExpiresByType image/png "access plus 1 day"
    ExpiresByType image/x-icon "access plus 1 day"
    <FilesMatch "\.(php|php4)$">
        ExpiresByType text/html "now"
    </FilesMatch>
</IfModule>

This will also add mime type for the Microsoft formats that Apache does not know about by default, and set any image content to expire +1 day, so that they are not refreshed over and over.

This has reduced the servers consumption to around 80GiB per month, less then half.