RADIUS

Name

NAS-Identifier

Synopsis

Attribute Number	32
Length	3 or more octets
Value	STRING
Allowed in	Access-Request
Prohibited in	Access-Accept, Access-Reject, Access-Challenge
Presence in Packet	Required, unless NAS-IP-Address is present
Maximum Iterations	1

This attribute identifies the NAS that constructed the Access-Request packet. Most often, the fully qualified domain name (FQDN) is used in the value portion of this attribute (for instance, local-nas3.raleigh.corp.hasselltech.net), although the RFC states that the value must be treated as a series of undistinguished octets. The FQDN is often used to eliminate duplicate NAS identifiers and reduce confusion for the client.

This attribute is often vendor specific and each implementation may have customized the use and behavior of this attribute. Additionally, in transactions involving a proxy server, this value can become mangled.