fail2ban/config/action.d/ipfilter.conf

# Fail2Ban configuration file
#
# NetBSD ipfilter (ipf command) ban/unban
#
# Author: Ed Ravin <eravin@panix.com>
#
#

[Definition]

# Option:  actionstart
# Notes.:  command executed once at the start of Fail2Ban.
# Values:  CMD
#
# enable IPF if not already enabled
actionstart = /sbin/ipf -E


# Option:  actionstop
# Notes.:  command executed once at the end of Fail2Ban
# Values:  CMD
#
# don't disable IPF with "/sbin/ipf -D", there may be other filters in use
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:    See jail.conf(5) man page
# Values:  CMD
#
actionban = echo block <blocktype> in quick from <ip>/32 | /sbin/ipf -f -


# 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
#
# note -r option used to remove matching rule
actionunban = echo block <blocktype> in quick from <ip>/32 | /sbin/ipf -r -f -

[Init]

# Option: Blocktype
# Notes : This is the return-icmp[return-code] mentioned in the ipf man page section 5. Keep this quoted to prevent
#         Shell expansion. This should be blank (unquoted) to drop the packet.
# Values: STRING
blocktype = "return-icmp(port-unr)"