A newruleset that contains actual blocks people can use if they

uncomment them.  this is no longer a sample.  everything in here now
must be completely legit.
discussed at length with henning, claudio, and sthen
ok sthen

src/etc/pf.conf

@@ -1,36 +1,35 @@
-#	$OpenBSD: pf.conf,v 1.37 2008/05/09 06:04:08 reyk Exp $
+#	$OpenBSD: pf.conf,v 1.38 2009/02/23 01:18:36 deraadt Exp $
 #
-# See pf.conf(5) for syntax and examples.
+# See pf.conf(5) for syntax and examples; this sample ruleset uses
+# require-order to permit mixing of NAT/RDR and filter rules.
 # Remember to set net.inet.ip.forwarding=1 and/or net.inet6.ip6.forwarding=1
 # in /etc/sysctl.conf if packets are to be forwarded between interfaces.
 
-#ext_if="ext0"
-#int_if="int0"
-
-#table <spamd-white> persist
-
-#set skip on lo
-
-#scrub in
+set require-order no
+set skip on lo
+scrub in
 
+# NAT/filter rules and anchors for ftp-proxy(8)
 #nat-anchor "ftp-proxy/*"
 #rdr-anchor "ftp-proxy/*"
-#rdr-anchor "relayd/*"
-#nat on $ext_if from !($ext_if) -> ($ext_if:0)
-#rdr pass on $int_if proto tcp to port ftp -> 127.0.0.1 port 8021
-#no rdr on $ext_if proto tcp from <spamd-white> to any port smtp
-#rdr pass on $ext_if proto tcp from any to any port smtp \
-#	-> 127.0.0.1 port spamd
-
+#rdr pass on ! egress proto tcp to port ftp -> 127.0.0.1 port 8021
 #anchor "ftp-proxy/*"
+#pass out proto tcp from $proxy to any port ftp
+
+# NAT/filter rules and anchors for relayd(8)
+#rdr-anchor "relayd/*"
 #anchor "relayd/*"
-#block in
-#pass out
 
-#pass quick on $int_if no state
-#antispoof quick for { lo $int_if }
+# NAT rules and anchors for spamd(8)
+#table <spamd-white> persist
+#table <nospamd> persist file "/etc/mail/nospamd"
+#no rdr on egress proto tcp from <nospamd> to any port smtp
+#no rdr on egress proto tcp from <spamd-white> to any port smtp
+#rdr pass on egress proto tcp from any to any port smtp -> 127.0.0.1 port spamd
+
+pass in		# to establish keep-state
+
+#block in quick from urpf-failed to any	# use with care
 
-#pass in on $ext_if proto icmp to ($ext_if)
-#pass in on $ext_if proto tcp to ($ext_if) port ssh
-#pass in log on $ext_if proto tcp to ($ext_if) port smtp
-#pass out log on $ext_if proto tcp from ($ext_if) to port smtp
+# By default, do not permit remote connections to X11
+block in on ! lo0 proto tcp from any to any port 6000