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CSF is a powerfull Firewall for Linux and cPanel servers are here are some tips to get it working with Virtuozzo VPS
Installation
============
Installation is quite straightforward:
rm -fv csf.tgz
wget http://www.configserver.com/free/csf.tgz
tar -xzf csf.tgz
cd csf
sh install.sh
After the installation you will need to customize CSF to run on VPS:
=====================================================
edit /etc/sysconfig/iptables and add
-A FORWARD -j ACCEPT -p all -s 0/0 -i venet0
-A FORWARD -j ACCEPT -p all -s 0/0 -o venet0
-A INPUT -i venet0 -j ACCEPT
-A OUTPUT -o venet0 -j ACCEPT
create file /etc/csf/csfpre.sh and enter all the extra rules directly into it prefixed with "iptables" so the contents of that file should look something like:
iptables -A INPUT -i venet0 -j ACCEPT
iptables -A OUTPUT -o venet0 -j ACCEPT
iptables -A FORWARD -j ACCEPT -p all -s 0/0 -i venet0
iptables -A FORWARD -j ACCEPT -p all -s 0/0 -o venet0
edit /etc/csf/csf.conf file and add
and search for
ETH_DEVICE = ""
change to
ETH_DEVICE = "venet+"
(as there is no eth0 in a VPS).
For more support and guidelines please see the CSF forum
http://forum.configserver.com/index.php
Descriptions and Functions
======================
csf+lfd works on all Linux servers on the Operating Systems listed above, with or without cPanel
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-pftd, 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 regular expression matching
- 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
- BOGON packet protection
- 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
- SYN Flood protection
- Ping of death protection
- Port Scan tracking and blocking
- Permanent and Temporary (with TTL) IP blocking
- Exploit checks
- Account modification tracking - sends alerts if an account entry is modified, e.g. if the password is changed or the login shell
- Shared syslog aware
- New in v4: Messenger Service - Allows you to redirect connection requests from blocked IP addresses to preconfigured text and html pages to inform the visitor that they have been blocked in the firewall. This can be particularly useful for those with a large user base and help process support requests more efficiently
- New in v4: Country Code blocking - Allows you to deny or allow access by country - Powered by IPDENY.COM IP database
- New in v4: Port Flooding Detection - Per IP, per Port connection flooding detection and mitigation to help block DOS attacks
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