contrib/ipfilter/rules/example.9


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#
# drop all packets without IP security options
#
block in all
pass in all with opt sec
#
# only allow packets in and out on le0 which are top secret
#
block out on le1 all
pass out on le1 all with opt sec-class topsecret
block in on le1 all
pass in on le1 all with opt sec-class topsecret