Cisco Systems Servers Manuale Utente

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Cisco Secure ACS 3.0 for Windows 2000/NT Servers User Guide
78-13751-01, Version 3.0
A P P E N D I X
F
Cisco Secure ACS and Virtual Private 
Dial-up Networks
Cisco Secure Access Control Server for Windows NT/2000 Servers Version 3.0 
(Cisco Secure ACS) supports authentication forwarding of virtual private dial-up 
network (VPDN) requests. There are two basic types of “roaming” users: Internet 
and intranet; VPDN addresses the requirements of roaming intranet users. This 
chapter provides information about the VPDN process and how it affects the 
operation of Cisco Secure ACS. 
VPDN Process
This section describes the steps for processing VPDN requests in a standard 
environment.
1.
A VPDN user dials in to the network access server (NAS) of the regional 
service provider (RSP). The standard call/point-to-point protocol (PPP) setup 
is done. A username and password are sent to the NAS in the format 
username@domain (for example, mary@corporation.us). See 
.