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RADIUS
book

RADIUS

by Jonathan Hassell
October 2002
Intermediate to advanced
206 pages
8h 30m
English
O'Reilly Media, Inc.
Content preview from RADIUS

Name

Session-Timeout

Synopsis

Attribute Number

27

Length

6

Value

INTEGER

Allowed in

Access-Accept, Access-Challenge

Prohibited in

Access-Request, Access-Reject

Presence in Packet

Not required

Maximum Iterations

1

This attribute indicates the maximum length of time in seconds that a user may remain connected to the network before the RADIUS client will kick him off. This is primarily used to enforce connect-time limits on certain account package types or to prevent camping on a line. (Camping is when a user treats a non-dedicated connection, such as a dial-up account, as a dedicated connection by keeping the line up 24 hours a day, 7 days a week.)

Much like the Idle-Timeout attribute, there are many software packages meant for the client side that detect a disconnected session and immediately reconnect it. There is no inherent mechanism on the RADIUS server, at least as specified in the RFC, to prevent usage of this software, since the Session-Timeout value is just a counter that is stateless and memory-less. It can be and is reset each time a new connection is made.

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Publisher Resources

ISBN: 0596003226Errata Page