This includes the server operating system, web server software, PHP, and any other dependencies. Regular updates help patch security vulnerabilities.
Follow best practices for server security, configure firewalls, and regularly audit server logs for suspicious activity.
Use SSL certificates to encrypt data transmitted between the WHMCS system and users' browsers.
This adds an extra layer of security, requiring users to provide a second form of verification in addition to their password.
Implement strong password policies for all WHMCS users. Encourage or enforce the use of complex passwords to prevent unauthorized access.
If your WHMCS handles online transactions, ensure that the payment gateway integration is secure and compliant with industry standards (PCI DSS).