# For this example, "foo" has an IP address of 10.2.2.2
#
# allow any TCP packets from the same subnet as foo is on through to host
# 10.1.1.2 if they are destined for port 6667.
#
pass in proto tcp from 10.2.2.2/24 to 10.1.1.2/32 port = 6667
#
# allow in UDP packets which are NOT from port 53 and are destined for
# localhost
#
pass in proto udp from 10.2.2.2 port != 53 to localhost
#
# block anything trying to get to X terminal ports, X:0 to X:9
#
block in proto tcp from any to any port 5999 >< 6010
#
# allow any connections to be made, except to BSD print/r-services
# this will also protect syslog.
#
block in proto tcp/udp all
pass in proto tcp/udp from any to any port 512 <> 515
#
# allow any connections to be made, except to BSD print/r-services
# this will also protect syslog.
#
pass in proto tcp/udp all
block in proto tcp/udp from any to any port 511 >< 516