ConfigServer Security & Firewall (CSF) is a must-have security tool for any cPanel server. Best of all, it's free - but proper configuration is essential.
What is CSF?
CSF is a Stateful Packet Inspection (SPI) firewall, login/intrusion detection, and security application for Linux servers. It integrates directly with cPanel/WHM for easy management.
Key Security Features
- SPI Firewall - Stateful packet inspection with easy port management
- Login Failure Daemon (LFD) - Monitors login attempts and blocks attackers
- Process Tracking - Monitors suspicious processes
- Directory Watching - Alerts on file system changes
- Messenger Service - Displays block messages to banned users
- Connection Limiting - Prevents DoS attacks
Essential CSF Settings
After installation, ensure TESTING mode is disabled. Configure DENY_IP_LIMIT, CT_LIMIT for connection tracking, and enable email alerts for security events.
Professional Server Security
While CSF is excellent, consider adding Imunify360 for comprehensive protection. SharedLicense.net offers security add-ons that complement CSF. Visit our Security section.