ConfigServer Firewall (CSF) is a powerful and highly configurable Linux firewall application designed to protect Linux servers from malicious traffic and other online threats. It is a modern, stateful, iptables-based firewall script that is designed to be secure, easy to use, and highly configurable. CSF allows server admins to configure a wide variety of security actions, including packet filtering, port blocking, and IP address blocking. It also provides a range of monitoring and logging features, such as connection tracking, intrusion detection, and log analysis. CSF also provides a graphical user interface for administering the firewall.
Discontinued The last update was released on April 18, 2013. "After working on Firewall Builder for many years, Vadim and I announce that we have discontinued all development activity on this project. Firewall Builder has been a great project "We worked on and really appreciate all the support and positive feedback that the user community has provided. Without you, we wouldn't have been able to keep things going."