WHMCS has many features built-in to help keep your data safe, but here are several simple extra steps you can take to secure your WHMCS installation even further.
Secure the Writeable Directories
We recommend moving all writeable directories to a non-public directory above your web root to prevent web based access. There are three writeable directories required for WHMCS to function, they are: "attachments", "downloads" and "templates_c"
When you move the directories, you need to provide WHMCS with the new paths to use them. You do this by adding (or updating if they already exist) the following lines in the configuration.php file within the root WHMCS directory.
$attachments_dir = "/home/username/attachments/"; $downloads_dir = "/home/username/downloads/"; $templates_compiledir = "/home/username/templates_c/";
In the above example, "username" is the cPanel username and so the 3 folders are located in the home directory, above public_html.
Move the Crons Directory
The crons folder may be moved to any place above or below the docroot.
The files within the crons directory need to know where to find your WHMCS installation, and your WHMCS installation needs to know where to find the crons directory, so the relocation process involves editing two files.
1. Begin by choosing a new location for your crons directory and move the entire /crons/ folder and contents to it.
2. Open the config.php file within the crons directory and follow the instructions within it to uncomment the WHMCS path line and provide the full path to your WHMCS installation. For example:
$whmcspath = '/home/username/public_html/whmcs/';
The above example assumes cPanel is being used, where "username" is the account username and "whmcs" is the directory containing the WHMCS installation.
3. Open the configuration.php file within your WHMCS installation root directory and add the following line to the bottom of the file so that WHMCS is able to locate your custom crons directory location and show you the correct paths you need to use for cron and piping command configuration within the admin interface.
$crons_dir = '/home/username/whmcs_crons/';
The above example assumes cPanel is being used, where "username" is the account username and "whmcs_crons" is the custom crons directory.
Restrict Access by IP
For increased protection, if your staff use fixed IP addresses, you can add even more protection to your admin area by restricting access to a specific set of IPs. This is done by creating a file with the name .htaccess within your WHMCS admin directory, with the following content:
order deny,allow allow from 220.127.116.11 allow from 18.104.22.168 deny from all
You can specify as many different allow from lines as you require. Or you can even allow entire IP subnet's by specifying just the first part of an IP, for example: "12.34.". This is called Htaccess IP Restriction.
Change your WHMCS Admin Folder Name
Customising the url of your WHMCS admin area makes it harder for boths and malicious users to find it. It is not required, but if you wish to do so, find out how here: Customising the Admin Directory
Restrict Database Privileges
For day to day use, only the following database privileges are required. All others may be disabled.
Please note that installation, upgrading, activating, and deactivating modules require the following additional privileges.