I've read through a number of posts from contributors having similar problems and the mist is starting to clear slightly.
However, I still need some specifics on how these sticky IPs are working.
One of our clients has a BT broadband line, a 2wire router and 5 static IPs.
Each time the 2wire box connects it is assigned a dynamic IP. BT keep track of which IP the customer has and routes traffic to the static IP block through this dynamic IP. I have had this working with an additional router connected to the 2wire box with the WAN interface set to one of the static IPs.
I want to set things up so that I just have the 2wire working as a regular NAT router - one static IP on the WAN that I can port forward to internal hosts.
How do I do this? Is it possible? Or will I always need a second router in this scenario?