Firewall/NAT

Hi,

Right now I have an old PIX as firewall, but I would like to change to m0n0wall.

I can't fingure out how to setup the WAN part in my m0n0wall. My external IP adresse is xxx.163.169.170 (255.255.255.252) and xxx.163.186.224/28 (255.255.255.240)

The xxx.163.169.170 is used at for my PC's (NAT) and the xxx.163.186.224/28 is used for different servers.

How do I set up the WAN in my m0n0wall?