Hi, i am slogging my way through setting up a Routerboard 500 and I have hit a wall. I am using two of the NICs as WAN ports to different providers and the third is the LAN running to a switch. I am running NAT to a majority of my customers, but have about 20 with routable static addresses. Will I be able to have both types of addresses served out one interface? If so… how do i do that… and if not, any suggestions other than running both outbound lines through the switch prior to the router?
I also would like to know if two different subnets can be served by one network interface. I know that one network interface can have more than one IP addresses as described in the manual, but I don’t know if these can be of different subnets.
Hi spire2z! Thank you very much!
I actually unsuccessfully searched the forum for this, but you just pointed out exactly the right thread! I tried your solution and it really works! 
Now I don’t need that one router which used to bridge the host with the public IP.
Again, thanks a lot man!
that did get the traffic passing, but it is still translating at the router. I was hoping to be able to transparently bridge the traffic from the real address through the MT to the T1 router.