Edit: /etc/fail2ban/action.d/osx-ipfw.conf (2302B)
# Fail2Ban configuration file
#
# Author: Nick Munger
# Modified by: Andy Fragen and Daniel Black
#
# Mod for OS X, using random rulenum as OSX ipfw doesn't include tables
#
[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 =
# Option: actionstop
# Notes.: command executed at the stop of jail (or at the end of Fail2Ban)
# Values: CMD
#
actionstop =
# Option: actioncheck
# Notes.: command executed once before each actionban command
# Values: CMD
#
actioncheck =
# Option: actionban
# Notes.: command executed when banning an IP. Take care that the
# command is executed with Fail2Ban user rights.
# Tags:
IP address
# Values: CMD
#
actionban = ipfw add set log from to
# Option: actionunban
# Notes.: command executed when unbanning an IP. Take care that the
# command is executed with Fail2Ban user rights.
# Tags: IP address
# Values: CMD
#
actionunban = ipfw delete `ipfw -S list | grep -i 'set log from to ' | awk '{print $1;}'`
[Init]
# Option: port
# Notes.: specifies port to block. Can be blank however may require block="ip"
# Values: [ NUM | STRING ]
#
port = ssh
# Option: dst
# Notes.: the local IP address of the network interface
# Values: IP, any, me or anything support by ipfw as a dst
#
dst = me
# Option: block
# Notes: This is how much to block.
# Can be "ip", "tcp", "udp" or various other options.
# Values: STRING
block = tcp
# Option: blocktype
# Notes.: How to block the traffic. Use a action from man 8 ipfw
# Common values: deny, unreach port, reset
# Values: STRING
#
blocktype = unreach port
# Option: set number
# Notes.: The ipset number this is added to.
# Values: 0-31
setnum = 10
# Option: number for ipfw rule
# Notes: This is meant to be automatically generated and not overwritten
# Values: Random value between 10000 and 12000
rulenum="`echo $((RANDOM%%2000+10000))`"
# Duplicate prevention mechanism
#rulenum = "`a=$((RANDOM%%2000+10000)); while ipfw show | grep -q ^$a\ ; do a=$((RANDOM%%2000+10000)); done; echo $a`"