Annotation of src/etc/pf.conf, Revision 1.19
1.19 ! ian 1: # $OpenBSD: pf.conf,v 1.18 2003/03/11 10:11:59 david Exp $
1.1 kjell 2: #
1.12 henning 3: # See pf.conf(5) and /usr/share/pf for syntax and examples.
1.17 david 4: # Required order: options, normalization, queueing, translation, filtering.
5: # Macros and tables may be defined and used anywhere.
1.12 henning 6: # Note that translation rules are first match while filter rules are last match.
1.18 david 7:
1.12 henning 8: # Macros: define common values, so they can be referenced and changed easily.
1.17 david 9: #ext_if="ext0" # replace with actual external interface name i.e., dc0
1.19 ! ian 10: #int_if="int0" # replace with actual internal interface name i.e., dc1
1.17 david 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 }
1.5 henning 16:
1.12 henning 17: # Options: tune the behavior of pf, default values are given.
18: #set timeout { interval 30, frag 10 }
19: #set timeout { tcp.first 120, tcp.opening 30, tcp.established 86400 }
1.13 henning 20: #set timeout { tcp.closing 900, tcp.finwait 45, tcp.closed 90 }
1.12 henning 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 }
1.15 dhartmei 24: #set limit { states 10000, frags 5000 }
1.12 henning 25: #set loginterface none
1.14 henning 26: #set optimization normal
1.12 henning 27: #set block-policy drop
28: #set require-order yes
29:
1.17 david 30: # Normalization: reassemble fragments and resolve or reduce traffic ambiguities.
1.10 deraadt 31: #scrub in all
1.5 henning 32:
1.17 david 33: # Queueing: rule-based bandwidth control.
34: #altq on $ext_if bandwidth 2Mb cbq queue { dflt, developers, marketing }
35: #queue dflt bandwidth 5% cbq(default)
36: #queue developers bandwidth 80%
37: #queue marketing bandwidth 15%
38:
39: # Translation: specify how addresses are to be mapped or redirected.
1.12 henning 40: # nat: packets going out through $ext_if with source address $internal_net will
41: # get translated as coming from the address of $ext_if, a state is created for
42: # such packets, and incoming packets will be redirected to the internal address.
43: #nat on $ext_if from $internal_net to any -> ($ext_if)
1.4 henning 44:
1.7 ian 45: # rdr: packets coming in on $ext_if with destination $external_addr:1234 will
46: # be redirected to 10.1.1.1:5678. A state is created for such packets, and
1.4 henning 47: # outgoing packets will be translated as coming from the external address.
1.10 deraadt 48: #rdr on $ext_if proto tcp from any to $external_addr/32 port 1234 -> 10.1.1.1 port 5678
1.4 henning 49:
1.19 ! ian 50: # rdr outgoing FTP requests to the ftp-proxy
! 51: #rdr on $int_if proto tcp from any to any port ftp -> 127.0.0.1 port 8021
! 52:
1.17 david 53: # spamd-setup puts addresses to be redirected into table <spamd>.
1.16 jason 54: #table <spamd> persist
1.12 henning 55: #no rdr on { lo0, lo1 } from any to any
1.17 david 56: #rdr inet proto tcp from <spamd> to any port smtp -> 127.0.0.1 port 8025
1.12 henning 57:
1.17 david 58: # Filtering: the implicit first two rules are
1.10 deraadt 59: #pass in all
60: #pass out all
1.4 henning 61:
1.9 henning 62: # block all incoming packets but allow ssh, pass all outgoing tcp and udp
1.12 henning 63: # connections and keep state, logging blocked packets.
1.10 deraadt 64: #block in log all
65: #pass in on $ext_if proto tcp from any to $ext_if port 22 keep state
66: #pass out on $ext_if proto { tcp, udp } all keep state
1.17 david 67:
68: # pass incoming packets destined to the addresses given in table <foo>.
69: #pass in on $ext_if proto { tcp, udp } from any to <foo> port 80 keep state
1.19 ! ian 70:
! 71: # pass incoming ports for ftp-proxy
! 72: #pass in on $ext_if inet proto tcp from any to $ext_if user proxy keep state
1.17 david 73:
74: # assign packets to a queue.
75: #pass out on $ext_if from 192.168.0.0/24 to any keep state queue developers
76: #pass out on $ext_if from 192.168.1.0/24 to any keep state queue marketing