Appendix E VPDN Processing
VPDN Process

E-6

User Guide for Cisco Secure ACS for Windows Server
78-16592-01

Figure E-9 HG Uses ACS to Authenticate User

9. If another user (sue@corporation.us) dials in to the NAS while the tunnel is

up, the NAS does not repeat the entire authorization/authentication process.

Instead, it passes the user through the existing tunnel to the HG. See

Figure E-10.

Figure E-10 Another User Dials In While Tunnel is Up

Username = mary@corporation.us
Password = secret
Corporation
VPDN user
User = mary@corporati
o
ACS
RSP
ACS
Username = sue@corporation.us
Password = secret2
VPDN user
User = sue@corporati
o
Corporation
VPDN user
User = mary@corporati
o
ACS
RSP
ACS
VPDN
customer