# # block all inbound packets. # block in from any to
  any # # pass through packets to and from localhost. # pass in from
  127.0.0.1/32 to 127.0.0.1/32 # # allow a variety of individual hosts to send
  any type of IP packet to any # other host. # pass in from 10.1.3.1/32 to any
  pass in from 10.1.3.2/32 to any pass in from 10.1.3.3/32 to any pass in from
  10.1.3.4/32 to any pass in from 10.1.3.5/32 to any pass in from 10.1.0.13/32
  to any pass in from 10.1.1.1/32 to any pass in from 10.1.2.1/32 to any # # #
  block all outbound packets. # block out from any to any # # allow any packets
  destined for localhost out. # pass out from any to 127.0.0.1/32 # # allow any
  host to send any IP packet out to a limited number of hosts. # pass out from
  any to 10.1.3.1/32 pass out from any to 10.1.3.2/32 pass out from any to
  10.1.3.3/32 pass out from any to 10.1.3.4/32 pass out from any to 10.1.3.5/32
  pass out from any to 10.1.0.13/32 pass out from any to 10.1.1.1/32 pass out
  from any to 10.1.2.1/32