Secure Writeable Directories

We recommend moving all writeable directories to a private location and updating related items to prevent unauthorized web-based access.

System Requirements

For successful installation, updates, and operation, your system must meet the minimum system requirements for your WHMCS version.

Set Up a Test Environment

To prevent problems, we recommend testing updates and customizations in a test environment before applying them to your production server.


WHMCS includes all of the tools you need to create a custom knowledgebase for your company. Customers can view this in the Client Area.


Downloads can include product user manuals or relevant software utilities and can be products you sell, like custom themes for websites.