Cisco 3.3 - Manual (Page 782)

Appendix E VPDN Processing
VPDN Process
E-2
User Guide for Cisco Secure ACS for Windows Server
78-16592-01
Figure E-1 VPDN User Dials In
2. If VPDN is enabled, the NAS assumes that the user is a VPDN user. The NAS
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 .
Figure E-2 NAS Attempts to Authorize Domain
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
Figure E-3 .
Corporation
VPDN user
User = mary@corporatio
Call setup / PPP setup
Username = [email protected]
ACS
RSP
ACS
Authorization request
User = corporation.us
S6646
Corporation
VPDN user
User = [email protected]
ACS
RSP
ACS