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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:
Straight-forward SPI iptables firewall script Daemon process that checks for login authentication failures for: Courier imap, Dovecot, uw-imap, Kerio openSSH cPanel, WHM, Webmail (cPanel servers only) Pure-ftpd, vsftpd, Proftpd Password protected web pages (htpasswd) Mod_security failures (v1 and v2) Suhosin failures Exim SMTP AUTH Custom login failures with separate log file and серверы под эмуляторы regular expression matching.
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 серверы под эмуляторы memu 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.

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