New cmc v2.00


  • Added Easyapache v4 support
  • Removed references to as it is no longer used by cPanel
  • Fixed modify file list to only list actual files

New csf v8.06


  • Added port 24441 to UDP_OUT and UDP6_OUT for new installs on cPanel servers for Pyzor that was added by cPanel in v11.52
  • Support added for EasyApache4 log locations in cPanel from /etc/cpanel/ea4/paths.conf
  • Added more executable files to csf.pignore on cPanel servers for cPanel EasyApache4
  • Modify Server Check to support cPanel EasyApache4
  • Added regex to support cPanel/WHM login failures with the new log format in v11.52+
  • If mod_ruid2 is enabled do not check for mod_userdir in Server Check
  • Always ensure binary exists and is executable before performing processing during Server Check
  • Modified ProFTPD regex to support more formats
  • vsftpd inbuilt log file format regex added
  • Modified cPanel antirelayd Server Check to also support popbeforesmtp added in v11.52
  • Added dbus and time systemd regexes to csf.logignore for new installs

New csf v8.05


  • Added alarms to HOST binary calls
  • Added new csf CLI option: –rbl [email]. This generates the report checking IP addresses against a set of RBLs. Optional configuration is available through /etc/csf/csf.rblconf
  • Added UI to utilise the new –rbl [email] option
  • Added systemd status output after lfd restart via the csf CLI
  • Modified Server Check to only report bind if a named configuration file exists
  • Require cPanel resellers to enter a Comment when allowing or denying an IP
  • Added new option UI_IP to allow binding to a specific IP address for the integrated UI

New cxs v5.31


  • Ensure only root can attempt to download the bayes corpus
  • Fixed POD reference to –bforget
  • Fixed POD formatting of long example commands
  • Updated Software Version Checking
  • Exploit regex definitions database additions
  • Exploit fingerprint definitions database additions

csf PT_USERKILL Recommendation

We wanted to reiterate the points made in the csf configuration and during csf restart regarding the PT_USERKILL option and the problems it can cause on servers as there appears to have been a spate of people enabling the option, which we do not recommend for stability reasons.

As csf itself now reports:

*WARNING* PT_USERKILL should not normally be enabled as it can easily 
lead to legitimate processes being terminated, use csf.pignore instead

And as stated in /etc/csf/csf.conf:

# Warning: We don't recommend enabling this option unless absolutely necessary
# as it can cause unexpected problems when processes are suddenly terminated.
# It can also lead to system processes being terminated which could cause
# stability issues. It is much better to leave this option disabled and to
# investigate each case as it is reported when the triggers above are breached

New csf v8.04


  • Added more executable files to csf.pignore on cPanel servers for cPanel v11.5*+
  • Added warning to both csf output and Server Check report if PT_USERKILL is enabled

New csf v8.02


  • Modified DYNDNS and GLOBAL_DYNDNS to use the host binary if available for more reliable IPv4 and IPv6 reverse lookups
  • Fixed IPv6 use of ipset for DYNDNS and GLOBAL_DYNDNS
  • Added new csf CLI option: –lfd [stop|start|restart|status]. Actions to take with the lfd daemon
  • Added new csf CLI option: -ra, –restartall. Restart firewall rules (csf) and then restart lfd daemon
  • Fixed several output message typos for “FASTSTART”
  • Disable IPv6 nat support (and MESSENGER) if ip6tables nat not provided by the local kernel
  • Improve IPv6 detection on installation
  • Implemented more efficient csf.conf loading in ConfigServer::Config

New csf v8.00


  • Added new option CC6_LOOKUPS. This adds IPv6 support for Country Code and Country lookups
  • Added new option LF_NETBLOCK_IPV6. This adds IPv6 support for LF_NETBLOCK
  • Modified LF_LOOKUPS to use the host binary if available for more reliable IPv4 and IPv6 reverse lookups
  • Added IPv6 support for LF_IPSET
  • Added IPv6 support for X_ARF report where found in the Abusix Contact DB
  • Added IPv6 nameserver support for /etc/resolv.conf
  • Added IPv6 support for MESSENGER if ip6tables version >= 1.4.17 and perl module IO::Socket::INET6 is installed
  • Added IPv6 support for PORTFLOOD if ip6tables version >= 1.4.3
  • Added IPv6 support for CONNLIMIT if ip6tables version >= 1.4.3
  • Added IPv6 support for SYNFLOOD
  • Added flush of ip6tables nat table if ip6tables version >= 1.4.17
  • Standardise all IPv6 addresses and networks to use the short form for consist representation
  • Added FASTSTART support to LF_IPSET
  • Increased ulimit -n to 4096 in /etc/init.d/lfd
  • Included Net::IP for IP address manipulation
  • Included version perl module for version comparisons
  • Added missing csf.allow search to csf –grep
  • Added Server Check report for LF_IPSET when using Country Code filters