Here is the situation. My client has a SonicWall on their DSL line that has been working perfectly fine for VPN until BellSouth moved them from having a single static IP address to having a Multiple Static IP address block. One of the problems we now face is that BellSouth does not assign a static IP directly to the WAN port on the SonicWall as they had done in the past. Rather, they give a dynamic address to the WAN port - but you can still assign your static IP addresses to devices on your network.
Here is the BellSouth Explination:
What that means is that what ever device performs the PPPoE authentication will get a Dynamic IP address assigned to its WAN (Wide Area Network) interface. The routing table, which tells routers how to get from one IP address to another, is then updated at that time to show that the Dynamic WAN address routes to their static range or Subnet. Ordinarily, the device that does the authentication will be our Netopia router. BellSouth does not provide a Static WAN address with Multi Static IP, only Dynamic. Simply put, when a customer connects to BellSouth they will get a Dynamic WAN address. In order to use their Static IP addresses they will need to configure their equipment.
So, how do I setup my SonicWall VPN to work properly again using one of our new static IP addresses. Before we just connected to the WAN port address, but that is now dynamic. Is there a way to use One to One NAT to solve the problem?