ConfigServer Services
Server Management Services from Way to The Web Ltd

A Stateful Packet Inspection (SPI) firewall, Login/Intrusion Detection and Security application for Linux servers.

Operating Systems

RedHat Enterprise v7 to v8
CentOS v7 to v8
RockyLinux v8
CloudLinux v7 to v8
AlmaLinux v8
Fedora v30
*openSUSE v10, v11, v12
*Debian v8 - v11
*Ubuntu v18 to v20
*Slackware v12

Virtual Servers

MS Virtual Server
Note: Any OS that is EOL will not be supported and newer versions of csf may no longer work as new functionality is added


The latest version of csf can be downloaded here: csf.tgz

The latest SHA256 checksums of all our products can be downloaded here: checksums.txt

This suite of scripts provides:

The reason we have developed this suite is that we have found over the years of providing server services that many of the tools available for the task are either over-complex, not user friendly, or simply aren't as effective as they could be.

ConfigServer Firewall (csf)

We have developed an SPI iptables firewall that is comprehensive, straight-forward, easy and flexible to configure

Login Failure Daemon (lfd)

To complement the ConfigServer Firewall (csf), we have developed a Login Failure Daemon (lfd) process that runs all the time and periodically (every X seconds) scans the latest log file entries for login attempts against your server that continually fail within a short period of time. Such attempts are often called "Brute-force attacks" and the daemon process responds very quickly to such patterns and blocks offending IP's quickly. Other similar products run every x minutes via cron and as such often miss break-in attempts until after they've finished, our daemon eliminates such long waits and makes it much more effective at performing its task.

Login tracking is an extension of lfd, it keeps track of POP3 and IMAP logins and limits them to X connections per hour per account per IP address.

Control Panel Configuration Interface

To help with the ease and flexibility of the suite we have developed a front-end to both csf and lfd which is accessible by the root account through cPanel, DirectAdmin and Webmin. From there you can modify the configuration files and stop, start and restart the applications and check their status. This makes configuring and managing the firewall very simple indeed.



We do not offer support for our free scripts on the HelpDesk. Please use the ConfigServer Scripts Forum


This application is released under our script license. It is released free of charge, with no warranty to its suitability. There is no support provided with this application except through the ConfigServer Scripts Forum where the community of csf users may assist one another.

If you don't feel confident doing any of this yourself, or if you get into a horrible mess, we do have cPanel Server Services that include the installation and configuration of this firewall.