Firewall Protection

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S ecuring your Linux server is important to protect your data, intellectual property, and time, from the hands of crackers (hackers). With our firewall service you will get the following features.

  • 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 regular expression matching
  • POP3/IMAP login tracking to enforce logins per hour
  • SSH login notification
  • SU login notification
  • Excessive connection blocking
  • UI Integration for cPanel, DirectAdmin and Webmin
  • Easy upgrade between versions from within cPanel/WHM, DirectAdmin or Webmin
  • Easy upgrade between versions from shell
  • Pre-configured to work on a cPanel server with all the standard cPanel ports open
  • Pre-configured to work on a DirectAdmin server with all the standard DirectAdmin ports open
  • 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 devicesServer Security Check - Performs a basic security and settings check on the server (via cPanel/DirectAdmin/Webmin UI)
  • Server Security Check - Performs a basic security and settings check on the server (via cPanel/DirectAdmin/Webmin UI)
  • 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
  • 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
  • Country Code blocking - Allows you to deny or allow access by ISO Country Code
  • Port Flooding Detection - Per IP, per Port connection flooding detection and mitigation to help block DOS attacks
  • WHM root access notification (cPanel servers only)
  • Deferred startup by lfd for servers with large block and/or allow lists
  • Distributed Login Failure Attack detection
  • Integrated UI - no need for a separate Control Panel or Apache to use the csf configuration
  • System Statistics - Basic graphs showing the performance of the server, e.g. Load Averages, CPU Usage, Memory Usage, etc
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