The VPDN (Virtual Private Dialup Networks) technology, which is based on the dialup customers, provides a specialized, secure solution to consolidate virtual networks and services. The technology exploits the IP networks'supporting function and takes advantage of the corresponding authentication and authorization.
VPDN（VirtualPrivateDialupNetworks）是基于拨号用户的虚拟专用拨号网业务，利用IP网络的承载功能，结合相应的认证和授权机制，可以建立安全的虚拟专用网络。