fail2ban/config/action.d/pf.conf

# Fail2Ban configuration file
#
# OpenBSD pf ban/unban
#
# Author: Nick Hilliard <nick@foobar.org>
# Modified by: Alexander Koeppe making PF work seamless and with IPv4 and IPv6
#
#

[Definition]

# Option:  actionstart
# Notes.:  command executed once at the start of Fail2Ban.
# Values:  CMD
#
# we don't enable PF automatically; to enable run pfctl -e 
# or add `pf_enable="YES"` to /etc/rc.conf (tested on FreeBSD)
# also, these rulesets are loaded into (nested) anchors
# to enable them, add
#     anchor f2b {
#        name1
#        name2
#        ...
#     }
# to your main pf ruleset, where "namei" are the names of the jails
# which invoke this action
actionstart = echo "table <<tablename>-<name>> persist counters" | <pfctl> -f- 
              echo "<block> proto <protocol> from <<tablename>-<name>> to <actiontype>" | <pfctl> -f-

# Option:  start_on_demand - to start action on demand
# Example: `action=pf[actionstart_on_demand=true]`
actionstart_on_demand = false

# Option:  actionstop
# Notes.:  command executed once at the end of Fail2Ban
# Values:  CMD
#
# we only disable PF rules we've installed prior
actionstop = <pfctl> -sr 2>/dev/null | grep -v <tablename>-<name> | <pfctl> -f-
             <pfctl> -t <tablename>-<name> -T flush
             <pfctl> -t <tablename>-<name> -T kill


# Option:  actioncheck
# Notes.:  command executed once before each actionban command
# Values:  CMD
#
actioncheck = <pfctl> -sr | grep -q <tablename>-<name>


# Option:  actionban
# Notes.:  command executed when banning an IP. Take care that the
#          command is executed with Fail2Ban user rights.
# Tags:    <ip>  IP address
#          <failures>  number of failures
#          <time>  unix timestamp of the ban time
# Values:  CMD
#
actionban = <pfctl> -t <tablename>-<name> -T add <ip>


# Option:  actionunban
# Notes.:  command executed when unbanning an IP. Take care that the
#          command is executed with Fail2Ban user rights.
# Tags:    <ip>  IP address
#          <failures>  number of failures
#          <time>  unix timestamp of the ban time
# Values:  CMD
#
# note -r option used to remove matching rule
actionunban = <pfctl> -t <tablename>-<name> -T delete <ip>

# Option: pfctl
#
# Use anchor as jailname to manipulate affected rulesets only.
# If more parameter expected it can be extended with `pf[pfctl="<known/pfctl> ..."]`
# 
pfctl = pfctl -a f2b/<name>

[Init]
# Option:  tablename
# Notes.:  The pf table name.
# Values:  [ STRING ]
#
tablename = f2b

# Option: block
#
# The action you want pf to take.
# Probably, you want "block quick", but adjust as needed.
block = block quick

# Option:  protocol
# Notes.:  internally used by config reader for interpolations.
# Values:  [ tcp | udp | icmp | ipv6-icmp ] Default: tcp
#
protocol = tcp

# Option: actiontype
# Notes.: defines additions to the blocking rule
# Values: leave empty to block all attempts from the host
# Default: Value of the multiport
actiontype = <multiport>

# Option: allports
# Notes.: default addition to block all ports
# Usage.: use in jail config: "banaction = pf[actiontype=<allports>]"
allports = any

# Option: multiport
# Notes.: addition to block access only to specific ports
# Usage.: use in jail config: "banaction = pf[actiontype=<multiport>]"
multiport = any port <port>