I need help setting up a PPTP or VPN setup from one of our central office locations to a branch office running cable. Here is the configuration at each site: Hub Site: Point to Point T1 coming in from an organization that provides our internet access. We are behind a firewall that does NAT and provides us with addresses in the 10.22.4.x subnet. Unfortunately, we have no way to circumvent this architecture and obtain an IP that would be visible via the net. Branch Office: Cable modem with dynamic IP. Since the branch office does not have a static IP. I would like to use a service such as Dyndns.org and the DDNS client built into the firmware to maintain a static hostname branchoffice.dyndns.org. I am new to VPNs, but I was hoping the VPN connection could somehow be established from behind the firewall at the hub site to the branch office which is visible on the internet. Is this set up possible and will it work? If not, what can I do to make this connection work with our configuration? What can I do to get this branch office connected? Thanks in advance for any help you can provide.