nat on fxp0 from 192.168.0.1 to any -> A1.A.A.A
nat on em0 from 192.168.0.1 to any -> B1.B.B.B
nat on fxp1 from 192.168.0.1 to any -> {A1.A.A.A,B1.B.B.B}
rdr on fxp0 from any to A1.A.A.A -> 192.168.0.1
rdr on em0 from any to B1.B.B.B -> 192.168.0.1
rdr on fxp1 from any to A1.A.A.A -> 192.168.0.1
rdr on fxp1 from any to B1.B.B.B -> 192.168.0.1