A Stateful Packet Inspection (SPI) firewall, Login/Intrusion Detection and Security application for Linux servers.
ConfigServer Firewall (csf) is a SPI iptables firewall that may not be as complicated and comprehensive as others, but is straight-forward, easy and flexible to configure and secure with more checks to ensure smooth operation.
Login Failure Daemon (lfd) is a daemon 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.
Supported and Tested Operating Systems:
RedHat v7.3, v8.0, v9.0
RedHat Enterprise v3, v4, v5
openSUSE v10
Debian v3.1 (sarge)
CentOS v3, v4, v5
Unbuntu v6.06 LTS
Fedora Core v1, v2, v3, v4, v5, v6
This suite of scripts provides:
Straight-forward SPI iptables firewall script
Daemon process that checks for login authentication failures for:
POP3/IMAP login tracking to enforce logins per hour
SSH login notification
SU login notification
Excessive connection blocking
WHM configuration interface (cPanel servers only) or through Webmin
WHM iptables report log (cPanel servers only)
Easy upgrade between versions from within WHM (cPanel servers only) or through Webmin
Easy upgrade between versions from shell
A standard Webmin Module to configure csf is included in the distribution ready to install into Webmin - csfwebmin.tgz
Pre-configured to work on a cPanel server with all the standard cPanel ports open (cPanel servers only)
Auto-configures the SSH port if it's non-standard on installation
Block traffic on unused server IP addresses - helps reduce the risk to your server
Alert when end-user scripts sending excessive emails per hour - for identifying spamming scripts
Suspicious process reporting - reports potential exploits running on the server
Excessive user processes reporting
Excessive user process usage reporting and optional termination
Suspicious file reporting - reports potential exploit files in /tmp and similar directories
Directory and file watching - reports if a watched directory or a file changes
Block traffic on the DShield Block List and the Spamhaus DROP List
Pre-configured settings for Low, Medium or High firewall security (cPanel servers only)
Works with multiple ethernet devices
Server Security Check - Performs a basic security and settings check on the server (cPanel servers only)
Allow Dynamic DNS IP addresses - always allow your IP address even if it changes whenever you connect to the internet
Alert sent if server load average remains high for a specified length of time
mod_security log reporting (if installed)
Email relay tracking - tracks all email sent through the server and issues alerts for excessive usage (cPanel servers only)
IDS (Intrusion Detection System) - the last line of detection alerts you to changes to system and application binaries
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. Visit ConfigServer Security &Firewall (csf) Website
