enable if-modified-since?

[oompaloompa]

Hello, could someone kindly share how to enable if-modified-since please?

 

[chatwizrd]

What is it?

 

[explosive]

What is it?

http://www.feedthebot.com/ifmodified.html

 

[chatwizrd]

Looks like it just requires mod_expires which is already built into Apache by default.

http://httpd.apache.org/docs/2.2/mod/mod_expires.html

Here is a cpanel example: http://forums.cpanel.net/f391/how-enable-if-modified-since-header-237421.html