Appendix E Cisco Secure ACS and Virtual Private Dial-up Networks
VPDN Process
E-4
User Guide for Cisco Secure ACS for Windows Server
78-14696-01, Version 3.1
Figure E-5
HG Authenticates Tunnel with ACS
5.
The HG now authenticates the tunnel with the NAS, where the username is
the name of the HG. This name is chosen based on the name of the tunnel, so
the HG might have different names depending on the tunnel being set up. See
Figure E-6
.
Figure E-6
HG Authenticates Tunnel with the NAS
6.
The NAS now uses its ACS to authenticate the tunnel from the HG. See
Figure E-7
.
S6649
Username = nas_tun
Password = CHAP_stuff
Corporation
VPDN user
User = [email protected]
ACS
RSP
Authentication request
ACS
S6650
CHAP challenge
Corporation
VPDN user
User = [email protected]
ACS
RSP
ACS
