
Configuring and Troubleshooting Bay Dial VPN Services
Glossary-6 303509-A Rev 00
Tunnel Management
System (TMS)
A database of IP tunnel management information that resides on a server on
the Dial VPN network. This server provides information to the NAS to
authenticate users (via the RADIUS client on the Dial VPN gateway) and to
construct IP tunnels, based on user dial-in information from the remote node
and information stored in the TMS database.
Virtual Private
Network (VPN)
A public wide area network (WAN) composed of many small local area
networks (LANs). Corporations can subscribe to a VPN to interconnect their
private LANs into a “virtual” private WAN. VPNs provide a business or
organization with all the functions and security of private, leased-line service,
but at costs based on usage instead of the fixed, leased rates for private lines.
Corporations still purchase a leased line but at a much cheaper price because it
connects the corporate site only to the local service provider point-of-presence
(PoP).
With virtual private networks, a long-distance service provider, such as a
telephone company, uses its own network resources and software to establish,
operate, and maintain the entire “virtual” private network on behalf of the
organization.
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