CSF
CSF (Config Server Firewall) is an iptables management script and logging daemon.
Command Line Options
csf -h - get help for CSF command line options
csf -g IP_Address - Look (grep) for an IP address to see if it's blocked
csf -a IP_Address - permanently allows the specified IP address
csf -d IP_Address "Your comment goes here" - Blocks the specified IP address, comment tells why
csf -dr IP_Address - Removes a blocked IP from being blocked
csf -ra - Restart CSF and LFD (leave off the a to restart just CSF)
Configuration Files
CSF and LFD settings are stored in:
/etc/csf
csf.conf - main CSF configuration file
Logs
See Log Locations