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ipfw nat 1 config iface $extif redirect_port 2222:2.2.2.3:2222
ipfw nat 2 config iface $intif
ipfw add 1 nat 1 ip from any to any via $extif
ipfw add 2 nat 2 ip from any to 2.2.2.3:2222 out via $intif
ipfw add 2 nat 2 ip from 2.2.2.3:2222 to me in via $intif
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