diff options
| -rw-r--r-- | etc/pf.conf | 46 |
1 files changed, 29 insertions, 17 deletions
diff --git a/etc/pf.conf b/etc/pf.conf index ebb95b5bd79..11b440828a4 100644 --- a/etc/pf.conf +++ b/etc/pf.conf @@ -1,38 +1,50 @@ -# $OpenBSD: pf.conf,v 1.11 2002/12/21 03:02:40 deraadt Exp $ +# $OpenBSD: pf.conf,v 1.12 2002/12/23 11:47:52 henning Exp $ # -# See pf.conf(5) for syntax and examples -# General order: options, scrub rules, NAT/rdr, and filter rules. -# Note that NAT is first match while packet filters are last match, +# See pf.conf(5) and /usr/share/pf for syntax and examples. +# General order: options, scrub rules, translation rules, and filter rules. +# 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="ext0" # replace with actual external interface name i.e., dc0 internal_net="10.1.1.1/8" external_addr="192.168.1.1" -# Normalize: reassemble fragments and resolve or reduce traffic ambiguities +# Options: tune the behavior of pf, default values are given. +#set timeout { interval 30, frag 10 } +#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 limit { states unlimited, frags 5000 } +#set loginterface none +#set optimization default +#set block-policy drop +#set require-order yes + +# Normalize: reassemble fragments and resolve or reduce traffic ambiguities. #scrub in all -# nat: packets going out through $ext_if with source address $internal_net will get -# translated as coming from $external_addr, 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 -> $external_addr +# 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 on $ext_if proto tcp from any to $external_addr/32 port 1234 -> 10.1.1.1 port 5678 -# filter rules -# the implicit first two rules are +# anchor where spamd-setup(8) attaches spam-redirection to spamd(8). +#no rdr on { lo0, lo1 } from any to any +#rdr-anchor spamd inet proto tcp from any to any port = smtp + +# filter rules: the implicit first two rules are #pass in all #pass out all # block all incoming packets but allow ssh, pass all outgoing tcp and udp -# connections and keep state, logging blocked packets +# connections and keep state, logging blocked packets. #block in log all #pass in on $ext_if proto tcp from any to $ext_if port 22 keep state #pass out on $ext_if proto { tcp, udp } all keep state - - -# anchor where spamd-setup(8) attaches spam-redirection to spamd(8) -#no rdr on { lo0, lo1 } from any to any -#rdr-anchor spamd inet proto tcp from any to any port = smtp |