Firewall/NAT

i want to put m0n0 in filtered bridge


[adsl modem- bridge mode] --- [m0n0wall 3 intefaces]------[lan]
                                                            |
                                                            |
                                                   [server1,server2,server3,server4,server5]
i want to bridge wan to dmz(example) and to allow server to connect to internet PPPoE
and to open to them certain ports, example: server1 80,433; server2 3306, server3 8080;etc
my isp gives only dynamic ip addresses
Is this possible to do?

You might be better using 1:1 natting from your wan to dmz
i personally dont use this feature so im not 100% sure