I have a BT business Hub Broadband service with a dynamic public IP address assigned. As a result, users who need to VPN into the internal network use the DDNS name assigned which should resolve to the current public IP address. However, for a couple of BT broadband users, they are unable to use the VPN service because the DDNS name is not resolving to the right public IP address but works for the non-BT users who use the service. Any idea the best approach to fix this? I don't want all BT users to have to change their DNS server settings to Google for instance, there must be a better solution in my view.
