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Appendix D RADIUS Attributes
IETF Dictionary of RADIUS AV Pairs
D-12
Cisco Secure ACS 3.0 for Windows 2000/NT Servers User Guide
78-13751-01, Version 3.0
IETF Dictionary of RADIUS AV Pairs
Table D-7 lists the supported RADIUS (IETF) attributes. If the attribute has a
security server-specific format, the format is specified. Accounting attributes are
listed in Table D-8 on page D-16.
Table D-7 RADIUS (IETF) Attributes
No. Attribute Description
1 User-Name Name of the user being authenticated.
2 User-Password User’s password or input following an access challenge. Passwords
longer than 16 characters are encrypted using IETF Draft #2 or later
specifications.
3 CHAP-Password PPP (Point-to-Point Protocol) CHAP (Challenge Handshake
Authentication Protocol) response to an Access-Challenge.
4 NAS-IP Address IP address of the AAA client that is requesting authentication.
5 NAS-Port Physical port number of the AAA client that is authenticating the user.
The AAA client port value (32 bits) consists of one or two 16-bit
values, depending on the setting of the RADIUS server extended
portnames command. Each 16-bit number is a 5-digit decimal integer
interpreted as follows:
For asynchronous terminal lines, async network interfaces, and virtual
async interfaces, the value is 00ttt, where ttt is the line number or
async interface unit number.
For ordinary synchronous network interfaces, the value is 10xxx.
For channels on a primary-rate ISDN (Integrated Services Digital
Network) interface, the value is 2ppcc.
For channels on a basic rate ISDN interface, the value is 3bb0c.
For other types of interfaces, the value is 6nnss.