IMG 1010 - RADIUS - NAS-Port-Type

Radius Attribute: NAS-Port-Type

As Per RFC 2865:

This Attribute indicates the type of the physical port of the NAS which is authenticating the user.  It can be used instead of or in addition to the NAS-Port (5) attribute.  It is only used in Access-Request packets.  Either NAS-Port (5) or NAS-Port-Type or both SHOULD be present in an Access-Request packet, if the NAS differentiates among its ports.

A summary of the NAS-Port-Type Attribute format is shown below.  The fields are transmitted from left to right.

Open

Type (IETF Number) = 61 for NAS-Port-Type.

Length = 6

Value = The Value field is four octets.  "Virtual" refers to a connection to the NAS via some transport protocol, instead of through a physical port.  For example, if a user telnetted into a NAS to authenticate himself as an Outbound-User, the Access-Request might include NAS-Port-Type = Virtual as a hint to the RADIUS server that the user was not on a physical port.

PIAFS is a form of wireless ISDN commonly used in Japan, and stands for PHS (Personal Handyphone System) Internet Access Forum Standard (PIAFS).