# $FreeBSD: src/etc/pf.conf,v 1.2 2004/09/14 01:07:18 mlaier Exp $
# $OpenBSD: pf.conf,v 1.21 2003/09/02 20:38:44 david Exp $
#
# See pf.conf(5) and /usr/share/exagmples/pf for syntax and examples.
# Required order: options, normalization, queueing, translation, filtering.
# Macros and tables may be defined and used anywhere.
# Note that translation rules are first match while filter rules are last match.
# Macros: define common values, so they can be referenced and changed easily.
ext_if="re0" # replace with actual external interface name i.e., dc0
int_if="lo0" # replace with actual internal interface name i.e., dc1
internal_net="127.0.0.1"
#external_addr="192.168.0.1"
external_addr="51.128.84.201"
# 3690 = svn
tcp_public_services="{ 22, 25, 80, 443 }"
udp_public_services="{ 22, 25, 80, 443 }"
tcp_priv_services="{ 20, 21, 110, 8009 }"
udp_priv_services="{ 20, 21, 110, 8009 }"

# Tables: similar to macros, but more flexible for many addresses.
#table <foo> { 10.0.0.0/8, !10.1.0.0/16, 192.168.0.0/24, 192.168.1.18 }
# Options: tune the behavior of pf, default values are given.
set timeout { interval 10, frag 30 }
set timeout { tcp.first 120, tcp.opening 30, tcp.established 86400 }
set timeout { tcp.closing 900, tcp.finwait 45, tcp.closed 90 }
set timeout { udp.first 60, udp.single 30, udp.multiple 60 }
set timeout { icmp.first 20, icmp.error 10 }
set timeout { other.first 60, other.single 30, other.multiple 60 }
set timeout { adaptive.start 0, adaptive.end 0 }
set limit { states 10000, frags 5000 }
set loginterface none
set optimization normal
set block-policy drop
set require-order yes
set fingerprints "/etc/pf.os"

# Normalization: reassemble fragments and resolve or reduce traffic ambiguities.
scrub in all

# Translation: specify how addresses are to be mapped or redirected.
# nat: packets going out through $ext_if with source address $internal_net will
# get translated as coming from the address of $ext_if, a state is created for
# such packets, and incoming packets will be redirected to the internal address.
nat on $ext_if from $internal_net to any -> ($ext_if)

# rdr: packets coming in on $ext_if with destination $external_addr:1234 will
# be redirected to 10.1.1.1:5678. A state is created for such packets, and
# outgoing packets will be translated as coming from the external address.
# rdr outgoing FTP requests to the ftp-proxy
#rdr on $int_if proto tcp from any to any port ftp -> 127.0.0.1 port 8021

# spamd-setup puts addresses to be redirected into table <spamd>.
#table <spamd> persist
#no rdr on { lo0, lo1 } from any to any
#rdr inet proto tcp from <spamd> to any port smtp -> 127.0.0.1 port 8025

# Filtering: the implicit first two rules are
# pass in all
pass out all

#pass quick in on pcn0 from any to any
pass quick on lo all
#pass quick in on pcn0 all
pass quick on $int_if all

# block all incoming packets but allow ssh, pass all outgoing tcp and udp
# connections and keep state, logging blocked packets.
block in log all

#pass icmp
#pass in on $ext_if proto icmp all icmp-type all
pass inet proto icmp all icmp-type echorep
pass inet proto icmp all icmp-type echoreq
pass inet proto icmp all icmp-type unreach
pass inet proto icmp all icmp-type timex

#pass public services
pass in on $ext_if proto tcp from any to $ext_if port $tcp_public_services keep state
pass in on $ext_if proto udp from any to $ext_if port $udp_public_services keep state

#pass private services
pass in on $ext_if proto tcp from <syn> to $ext_if port $tcp_priv_services keep state
pass in on $ext_if proto udp from <sym> to $ext_if port $udp_priv_services keep state
pass out on $ext_if proto { tcp, udp } all keep state

# pass incoming packets destined to the addresses given in table <foo>.
#pass in on $ext_if proto { tcp, udp } from any to <foo> port 80 keep state

# pass incoming ports for ftp-proxy
#pass in on $ext_if inet proto tcp from any to $ext_if user proxy keep state

table <bruteforce> persist file "/usr/local/etc/bruteforce"
block in quick proto tcp from <bruteforce> to any port ssh