hi,folks:
here's my network's layout:

                              |
                              |
                             em0 (160.79.174.99/29)
                              GateWay (FreeBSD 5.x ipf/ipnat, gateway_enabled)
                             em1 (192.168.1.1/25)
                              |
                              |
  em0 (192.168.1.126/25) -- Bridge --   em1 (192.168.1.254/25)
        |                                     |
        |                                     |
       LAN1                                  LAN2  
        |                                     |
 +---------------------+            +---------+---------+
 |                     |            |         |         |       
hostA(192.168.1.2/25) ...                               hostB(192.168.1.250/25)
WEB Server                                              Mail Server

and here's the ipnat.rules on my gateway box
   map em0  192.168.1.0/24 -> 160.79.174.99/32 portmap tcp/udp 10000:60000
   map em0  192.168.1.0/24 -> 160.79.174.99/32
   rdr em0  160.79.174.99/32 port 80 -> 192.168.1.2 port 80
   rdr em0  160.79.174.99/32 port 25 -> 192.168.1.250 port 25
now the problems is that the NAT work fine but the port redirection does not
work on IPNAT and PF.and I found that the port redirection just could work
on the same subnetworks(the rdr could forwarding the port to Bridge box but not
WEB Server or Mail Server).so I wondered could I setup the rdr rules to make it
forwarding ports to my LAN1 or LAN2's hosts ?? :-(  thanks any reply with 
appreciates!!

LAN1's defaultroute is 192.168.1.126
LAN2's defaultroute is 192.168.1.254
Bridge defaultroute is 192.168.1.1

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