What is Sentinel Firewall?
Sentinel is a fork of ConfigServer Firewall & Security
⚡ The sudden shutdown of Configserver in 2025 has left a huge gap in our ecosystem. For years, ConfigServer Firewall (CSF) has been the backbone of server security for hosting providers and control panels —stable, feature-rich, and trusted by sysadmins everywhere.
Luckily, Way to the Web Limited released the CSF script under the GPL license.
Soon after, a group of us SysAdmins have started the Sentinel project — a fork of CSF that is actively maintained, community-driven, and fully compatible as a drop-in replacement for existing servers.
🔧 The mission:
- Keep the features that made CSF indispensable
- Actively patch, improve, and adapt it to modern needs (ipsets to nfset, iptbales to nftables..)
- Build a sustainable, open project for the community
If you’ve relied on CSF in your day-to-day work, this is your chance to shape its future. We’re looking for developers, testers, sysadmins, writers, designers — anyone passionate about keeping servers secure.
👉 Let’s make sure the tool we’ve all depended on doesn’t fade away. Join us in building Sentinel and carry CSF’s legacy forward.
CSF
Advanced Firewall Protection
Provides robust iptables-based filtering to secure servers from unauthorized access.
Granular Access Control
Manage inbound and outbound traffic with precise port and IP restrictions.
Brute-Force Defense
Blocks repeated login attempts and suspicious activity automatically.
LFD
Real-Time Intrusion Detection
Monitors system logs for failed login attempts and malicious behavior.
Automated IP Blocking
Instantly bans attackers showing suspicious login patterns.
Alert & Notification System
Sends security alerts to keep administrators informed.
UI
User-Friendly Dashboard
Simplifies firewall and LFD management with an intuitive web UI.
Quick Rule Management
Add, edit, or remove firewall rules without command-line complexity.
Live Monitoring Tools
View active connections, blocks, and logs in real-time.