14
Protocols and standards
The following protocols and standards are related to AAA, RADIUS, HWTACACS, and LDAP:
• RFC 2865, Remote Authentication Dial In User Service (RADIUS)
• RFC 2866, RADIUS Accounting
• RFC 2867, RADIUS Accounting Modifications for Tunnel Protocol Support
• RFC 2868, RADIUS Attributes for Tunnel Protocol Support
• RFC 2869, RADIUS Extensions
• RFC 1492, An Access Control Protocol, Sometimes Called TACACS
• RFC 1777, Lightweight Directory Access Protocol
• RFC 2251, Lightweight Directory Access Protocol (v3)
RADIUS attributes
Commonly used standard RADIUS attributes
No. Attribute
Descri
tion
1 User-Name Name of the user to be authenticated.
2 User-Password
User password for PAP authentication, only present in Access-Request
packets when PAP authentication is used.
3 CHAP-Password
Digest of the user password for CHAP authentication, only present in
Access-Request packets when CHAP authentication is used.
4 NAS-IP-Address
IP address for the server to use to identify the client. Typically, a client is
identified by the IP address of its access interface. This attribute is only
present in Access-Request packets.
5 NAS-Port Physical port of the NAS that the user accesses.
6 Service-Type
Type of service that the user has requested or type of service to be
provided.
7 Framed-Protocol Encapsulation protocol for framed access.
8 Framed-IP-Address IP address assigned to the user.
11 Filter-ID Name of the filter list.
12 Framed-MTU
MTU for the data link between the user and NAS. For example, with
802.1X EAP authentication, NAS uses this attribute to notify the server of
the MTU for EAP packets to avoid oversized EAP packets.
14 Login-IP-Host IP address of the NAS interface that the user accesses.
15 Login-Service Type of the service that the user uses for login.
18 Reply-Message
Text to be displayed to the user, which can be used by the server to
communicate information, for example, the reason of the authentication
failure.
26 Vendor-Specific
Vendor specific, proprietary attribute. A packet can contain one or more
proprietary attributes, each of which can contain one or more
sub-attributes.
27 Session-Timeout Maximum service duration for the user before termination of the session.