We do it a bit differently.... We run a routed network with static, private IP's.
Each tower is assigned a private IP subnet. Clients are assigned a private, static IP in the subnet of the tower they connect to.
MikroTiks at my T1's control NAT rules that enable and disable individual clients. This also allows us to easily run point to point traffic across our wireless network to link a customers remote sites together without loading our T1's down. We also use this to provide special services to our agricultural clients including remote sensor monitoring, remote control of equipment and video monitoring.
We also firewall all our clients... -- Blair Davis AOL IM Screen Name -- Theory240 West Michigan Wireless ISP 269-686-8648 A division of: Camp Communication Services, INC -- WISPA Wireless List: firstname.lastname@example.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/