A P P E N D I X E Cisco Secure Acs And Virtual Private Dial-Up Networks; Vpdn Process - Cisco 2509 - Router - EN User Manual

VPDN Process

Figure E-1 VPDN User Dials In
Corporation
ACS
Figure E-2 NAS Attempts to Authorize Domain
Corporation
ACS
User Guide for Cisco Secure ACS for Windows Server
E-2
RSP
ACS
If VPDN is enabled, the NAS assumes that the user is a VPDN user. The NAS
2.
strips off the "username@" (mary@) portion of the username and authorizes
(not authenticates) the domain portion (corporation.us) with the ACS. See
Figure E-2.
RSP
ACS
3. If the domain authorization fails, the NAS assumes the user is not a VPDN
user. The NAS then authenticates (not authorizes) the user as if the user is a
standard non-VPDN dial user. See
Appendix E Cisco Secure ACS and Virtual Private Dial-up Networks
Call setup / PPP setup
Username = mary@corporation.us
VPDN user
User = mary@corporation.us
Authorization request
User = corporation.us
VPDN user
User = mary@corporation.us
Figure E-3.
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