1# $FreeBSD$ 2# 3# See pf.conf(5) and /usr/share/examples/pf for syntax and examples. 4# Required order: options, normalization, queueing, translation, filtering. 5# Macros and tables may be defined and used anywhere. 6# Note that translation rules are first match while filter rules are last match. 7 8# Macros: define common values, so they can be referenced and changed easily. 9#ext_if="ext0" # replace with actual external interface name i.e., dc0 10#int_if="int0" # replace with actual internal interface name i.e., dc1 11#internal_net="10.1.1.1/8" 12#external_addr="192.168.1.1" 13 14# Tables: similar to macros, but more flexible for many addresses. 15#table <foo> { 10.0.0.0/8, !10.1.0.0/16, 192.168.0.0/24, 192.168.1.18 } 16 17# Options: tune the behavior of pf, default values are given. 18#set timeout { interval 10, frag 30 } 19#set timeout { tcp.first 120, tcp.opening 30, tcp.established 86400 } 20#set timeout { tcp.closing 900, tcp.finwait 45, tcp.closed 90 } 21#set timeout { udp.first 60, udp.single 30, udp.multiple 60 } 22#set timeout { icmp.first 20, icmp.error 10 } 23#set timeout { other.first 60, other.single 30, other.multiple 60 } 24#set timeout { adaptive.start 0, adaptive.end 0 } 25#set limit { states 10000, frags 5000 } 26#set loginterface none 27#set optimization normal 28#set block-policy drop 29#set require-order yes 30#set fingerprints "/etc/pf.os" 31 32# Normalization: reassemble fragments and resolve or reduce traffic ambiguities. 33#scrub in all 34 35# Queueing: rule-based bandwidth control. 36#altq on $ext_if bandwidth 2Mb cbq queue { dflt, developers, marketing } 37#queue dflt bandwidth 5% cbq(default) 38#queue developers bandwidth 80% 39#queue marketing bandwidth 15% 40 41# Translation: specify how addresses are to be mapped or redirected. 42# nat: packets going out through $ext_if with source address $internal_net will 43# get translated as coming from the address of $ext_if, a state is created for 44# such packets, and incoming packets will be redirected to the internal address. 45#nat on $ext_if from $internal_net to any -> ($ext_if) 46 47# rdr: packets coming in on $ext_if with destination $external_addr:1234 will 48# be redirected to 10.1.1.1:5678. A state is created for such packets, and 49# outgoing packets will be translated as coming from the external address. 50#rdr on $ext_if proto tcp from any to $external_addr/32 port 1234 -> 10.1.1.1 port 5678 51 52# rdr outgoing FTP requests to the ftp-proxy 53#rdr on $int_if proto tcp from any to any port ftp -> 127.0.0.1 port 8021 54 55# spamd-setup puts addresses to be redirected into table <spamd>. 56#table <spamd> persist 57#no rdr on { lo0, lo1 } from any to any 58#rdr inet proto tcp from <spamd> to any port smtp -> 127.0.0.1 port 8025 59 60# Filtering: the implicit first two rules are 61#pass in all 62#pass out all 63 64# block all incoming packets but allow ssh, pass all outgoing tcp and udp 65# connections and keep state, logging blocked packets. 66#block in log all 67#pass in on $ext_if proto tcp from any to $ext_if port 22 keep state 68#pass out on $ext_if proto { tcp, udp } all keep state 69 70# pass incoming packets destined to the addresses given in table <foo>. 71#pass in on $ext_if proto { tcp, udp } from any to <foo> port 80 keep state 72 73# pass incoming ports for ftp-proxy 74#pass in on $ext_if inet proto tcp from any to $ext_if user proxy keep state 75 76# assign packets to a queue. 77#pass out on $ext_if from 192.168.0.0/24 to any keep state queue developers 78#pass out on $ext_if from 192.168.1.0/24 to any keep state queue marketing 79