Setting up ISP Leased line (Or) Replace Cisco router

[vamsi]

Dear All
I found number of entries related to above topic but none of them were clear. Could you guys help me how to configure a leased line using PFsense (2.0 Preffer)?

Every one says use AON but no examples found.

Our exsing senario:(cisco 1700 series router)

ISP IP Block (Serial port) 203.x.x.x/30 –> LAN POOL (202.x.x.x/28) alternate ip 192.x.x.x /24 -->nated to Local LAN series 192.168.1.x/24

Confused.. how to terminate WAN site /30 Block ip(only one) to PFSense WAN the LAN pool IP and Private LAN Pool with NAT

Please giude me how can we achive this?

best regards
vamsi