There are some limitations of the CloudFlare system:

• Currently, requests must be directed to www.$domain instead of $domain (which means you may need to make some configuration changes).

• CloudFlare may affect internal statistic programs that read directly from Apache logs. (CloudFlare will not affect web-based analytic programs that use JavaScript like Google Analytics.) While your logs will reflect fewer requests to your server and therefore lower load, the experience to your visitors should be unaffected.

• CloudFlare caches static content from your site. While this reduces the load on your server, it means that if you make a change to an existing static file, like an image, there may be a delay before the change appears. While you are updating your site, you can put CloudFlare in Development Mode so changes appear immediately.

• CloudFlare's basic mode cannot handle SSL certificates. If you need to use an SSL certificate, that part of your site needs to be on a subdomain that is not protected.