Enhancing Security

WHMCS includes features to help keep your data safe, and we recommend taking additional steps to secure your WHMCS installation further.

Troubleshooting Authentication

Authentication issues may include inability to log in, unexpected logouts, or errors while using other authentication methods.

Troubleshooting Server Issues

Some provisioning and server-related issues are due to misconfiguration in your WHMCS installation, while others may be due to networking issues or other server-side problems.

Banned IP Addresses

WHMCS automatically bans IP addresses after three failed login attempts, or you can permanently ban them manually.

Trusted Proxies

Use the Trusted Proxies setting to itemize IP addresses or ranges for detecting inbound traffic.