C-13
User Guide for Cisco Secure ACS for Windows Server
78-14696-01, Version 3.1
Appendix C RADIUS Attributes
IETF Dictionary of RADIUS AV Pairs
Table C-6 RADIUS (IETF) Attributes
Attribute Number Description
Type of
Value
Inbound/
Outbound Multiple
User-Name 1 Name of the user being
authenticated.
string Inbound No
User-Password 2 User password or input following an
access challenge. Passwords longer
than 16 characters are encrypted
using IETF Draft #2 or later
specifications.
string Outbound No
CHAP-Password 3 PPP (Point-to-Point Protocol) CHAP
(Challenge Handshake
Authentication Protocol) response to
an Access-Challenge.
string Outbound No
NAS-IP Address 4 IP address of the AAA client that is
requesting authentication.
ipaddr Inbound No