fail2ban/config/action.d/iptables.conf

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# Fail2Ban configuration file
#
# Author: Cyril Jaquier
#
#
[INCLUDES]
before = iptables-common.conf
[Definition]
# Option: actionstart
# Notes.: command executed on demand at the first ban (or at the start of Fail2Ban if actionstart_on_demand is set to false).
# Values: CMD
#
actionstart = <iptables> -N f2b-<name>
<iptables> -A f2b-<name> -j <returntype>
<iptables> -I <chain> -p <protocol> --dport <port> -j f2b-<name>
# Option: actionstop
# Notes.: command executed at the stop of jail (or at the end of Fail2Ban)
# Values: CMD
#
actionstop = <iptables> -D <chain> -p <protocol> --dport <port> -j f2b-<name>
<actionflush>
<iptables> -X f2b-<name>
# Option: actioncheck
# Notes.: command executed once before each actionban command
# Values: CMD
#
actioncheck = <iptables> -n -L <chain> | grep -q 'f2b-<name>[ \t]'
# Option: actionban
# Notes.: command executed when banning an IP. Take care that the
# command is executed with Fail2Ban user rights.
# Tags: See jail.conf(5) man page
# Values: CMD
#
actionban = <iptables> -I f2b-<name> 1 -s <ip> -j <blocktype>
# Option: actionunban
# Notes.: command executed when unbanning an IP. Take care that the
# command is executed with Fail2Ban user rights.
# Tags: See jail.conf(5) man page
# Values: CMD
#
actionunban = <iptables> -D f2b-<name> -s <ip> -j <blocktype>
[Init]