I am connecting 3 offices with SonicWall routers. Canada and Thailand are installed and working with a VPN tunnel between the 2. My problem is in the UK. All of the ISPs here use PPPoA for authentication. SonicWall does not support PPPoA. I have purchased a Billion ADSL modem/router to authenticate with the ISP but now need to connect the SonicWall to the modem. The ISP we are using has assigned a static public IP address that has to be used by modem and we have purchased a another block of static IPs, but they are not on the same subnet as the one assigned to the modem.
Any help in making this work would be much appreciated.