set service nat rule 5000 outbound-interface eth0
set service nat rule 5000 type source
set service nat rule 5000 protocol tcp
set service nat rule 5000 outside-address address 0.0.0.0
set service nat rule 5000 outside-address port 1234
set service nat rule 5000 source address 1.1.1.1
set service nat rule 5000 source port 1234