diff options
| -rw-r--r-- | share/man/man5/pf.conf.5 | 32 |
1 files changed, 13 insertions, 19 deletions
diff --git a/share/man/man5/pf.conf.5 b/share/man/man5/pf.conf.5 index af80e2b644a..201d3015dfa 100644 --- a/share/man/man5/pf.conf.5 +++ b/share/man/man5/pf.conf.5 @@ -1,4 +1,4 @@ -.\" $OpenBSD: pf.conf.5,v 1.155 2002/12/22 16:23:35 henning Exp $ +.\" $OpenBSD: pf.conf.5,v 1.156 2002/12/23 13:05:20 mcbride Exp $ .\" .\" Copyright (c) 2002, Daniel Hartmeier .\" All rights reserved. @@ -564,7 +564,7 @@ The .Pa no option prefixed to a translation rule causes packets to remain untranslated, much in the same way as -.Pa drop <direction> quick +.Pa drop quick works in the packet filter (see below). .Pp If no rule matches the packet, the packet is passed to the filter unmodified. @@ -667,12 +667,11 @@ generates all needed rule combinations. .Bl -tag -width xxxx .It Pa in No or Pa out The rule applies to incoming or outgoing packets. -Either +If neither .Pa in or .Pa out -must be specified. -To cover both directions, two rules are needed. +are specified, the rule will match packets in both directions. .It Em log In addition to the action specified, a log message is generated. All packets for that connection are logged, unless the `keep state' @@ -1041,8 +1040,7 @@ searches in O(log2 n). .Pp For instance: .Bd -literal - block out all - block in all + block all pass out proto tcp from any to any flags S/SA keep state pass in proto tcp from any to any port 25 flags S/SA keep state .Ed @@ -1088,7 +1086,7 @@ e.g as created by out, creates state, and matches incoming echo replies correctly to states. .Pp Note: -.Pa nat No or Pa rdr +.Pa nat, binat No and Pa rdr rules implicitly create state for connections. .Sh STATE MODULATION Much of the security derived from TCP is attributable to how well the @@ -1355,7 +1353,8 @@ incoming connections to port 25. .Pp Then .Bd -literal - # echo "block in quick from 1.2.3.4 to any" | pfctl -a spews:manual -f - + # echo "block in quick from 1.2.3.4 to any" \ \\ + pfctl -a spews:manual -f - .Ed .Pp loads a single ruleset containing a single rule into the @@ -1386,7 +1385,8 @@ spews are only evaluated for packets with destination port 25. Hence, .Bd -literal - # echo "block in quick from 1.2.3.4 to any" | pfctl -a spews:manual -f - + # echo "block in quick from 1.2.3.4 to any" | \\ + pfctl -a spews:manual -f - .Ed .Pp will only block connections from 1.2.3.4 to port 25. @@ -1484,12 +1484,7 @@ ext_if = "kue0" scrub in on $ext_if all fragment reassemble # block and log everything by default -block out log on $ext_if all -block in log on $ext_if all -block return-rst out log on $ext_if proto tcp all -block return-rst in log on $ext_if proto tcp all -block return-icmp out log on $ext_if proto udp all -block return-icmp in log on $ext_if proto udp all +block return log on $ext_if all # block anything coming from source we have no back routes for block in from no-route to any @@ -1515,8 +1510,7 @@ block in log quick on $ext_if from { 10.0.0.0/8, 172.16.0.0/12, \\ # so replies (like 0/0 for 8/0) will match queries # ICMP error messages (which always refer to a TCP/UDP packet) are # handled by the TCP/UDP states -pass out on $ext_if inet proto icmp all icmp-type 8 code 0 keep state -pass in on $ext_if inet proto icmp all icmp-type 8 code 0 keep state +pass on $ext_if inet proto icmp all icmp-type 8 code 0 keep state # UDP @@ -1558,7 +1552,7 @@ option = set ( [ "timeout" ( timeout | "{" timeout-list "}" ) ] | [ "block-policy" ( "drop" | "return" ) ] | [ "require-order" ( "yes" | "no" ) ] ) -pf-rule = action ( "in" | "out" ) +pf-rule = action [ ( "in" | "out" ) ] [ "log" | "log-all" ] [ "quick" ] [ "on" ifspec ] [ route ] [ af ] [ protospec ] hosts [filteropt-list] |