NetBSD/usr.sbin/ipf/rules/example.2

#
# block all outgoing TCP packets on le0 from any host to port 23 of
# host 10.1.1.2
#
block out on le0 proto tcp from any to 10.1.1.3/32 port = 23
Import ip-filter 3.2beta5 1997-09-21 20:47:50 +04:00			`#`
ip filter version 3.2.10 1998-11-22 17:21:44 +03:00			`# block all outgoing TCP packets on le0 from any host to port 23 of`
			`# host 10.1.1.2`
Import ip-filter 3.2beta5 1997-09-21 20:47:50 +04:00			`#`
ip filter version 3.2.10 1998-11-22 17:21:44 +03:00			`block out on le0 proto tcp from any to 10.1.1.3/32 port = 23`