Cisco 3.3 - Manual (Page 781)

E-1
User Guide for Cisco Secure ACS for Windows Server
78-16592-01
A P P E N D I X
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VPDN Processing
Cisco Secure ACS for Windows Server 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, [email protected]). See
Figure E-1 .