We have two computers running Windows 2000 Server, connected to the Internet using Internet accounts from two different Internet service providers. The IP addresses are provided dynamically by the ISP -- i.e., the IP address is not permanent or reserved for us.
As we are aware of those two IP addresses, can we establish a VPN channel between the two machines as long as the Internet connection is maintained with the ISP? If so, is it possible to do the same even though we have the two Internet accounts from the same ISP?
While dynamic DNS may be your best low- or no-cost solution, you will probably experience some downtime when an IP address does change. It can take several hours for DNS updates to propogate.
This was first published in June 2002