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      1  1.1  christos #	$NetBSD: example.10,v 1.1.1.1 2012/03/23 21:20:15 christos Exp $
      2  1.1  christos #
      3  1.1  christos # pass ack packets (ie established connection)
      4  1.1  christos #
      5  1.1  christos pass in proto tcp from 10.1.0.0/16 port = 23 to 10.2.0.0/16 flags A/A
      6  1.1  christos pass out proto tcp from 10.1.0.0/16 port = 23 to 10.2.0.0/16 flags A/A
      7  1.1  christos #
      8  1.1  christos # block incoming connection requests to my internal network from the big bad
      9  1.1  christos # internet.
     10  1.1  christos #
     11  1.1  christos block in on le0 proto tcp from any to 10.1.0.0/16 flags S/SA
     12  1.1  christos #  to block the replies:
     13  1.1  christos block out on le0 proto tcp from 10.1.0.0 to any flags SA/SA
     14