How to Install & Configure CSF Firewall on WHM/cPanel (CSF Now GPL – No Longer Maintained)
⚠️ Update (September 2025):
ConfigServer (CSF developers) officially shut down on 31 August 2025. CSF has been released under the GPLv3 license, so it still works and can be installed as shown in this tutorial. However, it is no longer actively maintained or supported. Please keep this in mind when using CSF on production servers.
🚀 How to Install & Configure CSF Firewall on WHM/cPanel
In this in‑depth tutorial, you’ll learn how to install ConfigServer Security & Firewall (CSF) on a WHM/cPanel Linux server, properly configure it, and deploy advanced firewall protections using the CSF plugin in WHM.
🔒 What you'll learn:
Remove existing firewalls like FirewallD before installing CSF
Download & install CSF from the official source (csf.tgz)
Enable and integrate CSF + LFD daemon for intrusion detection
✅ Benefits of using CSF on WHM/cPanel:
Stateful packet inspection firewall
Brute‑force detection & login blocking via LFD
Easy WHM plugin interface
Customizable port rules, notifications & security profiles
🛠️ Server compatibility:
RHEL/CentOS/CloudLinux/AlmaLinux and WHM/cPanel versions
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