IGPS-9080 Series User Manual
ORing Industrial Networking Corp
116
TCP URG
Specifies the TCP URG ("urgent pointer field significant") value for
the ACE
0
: TCP frames where the URG field is set must not be able to match
this entry.
1
: TCP frames where the URG field is set must be able to match this
entry.
Any
: any value is allowed ("
don't-care
").
5.8.4 Authentication, Authorization, and Accounting
An AAA server is an application that provides authentication, authorization, and accounting
services for attempted access to a network. An AAA server can reside in a dedicated computer,
an Ethernet switch, an access point or a network access server. The current standard by which
devices or applications communicate with an AAA server is RADIUS (Remote Authentication
Dial-In User Service). RADIUS is a protocol used between the switch and the authentication
server. This page allows you to configure common settings for an authentication server.
Label
Description
Timeout
The timeout, which can be set to a number between 3 and 3600
seconds, is the maximum time to wait for a reply from a server.
If the server does not reply within this time frame, we will consider it
to be dead and continue with the next enabled server (if any).
RADIUS servers are using the UDP protocol, which is unreliable by
design. In order to cope with lost frames, the timeout interval is
divided into 3 subintervals of equal length. If a reply is not received
within the subinterval, the request is transmitted again. This
algorithm causes the RADIUS server to be queried up to 3 times
before it is considered to be dead.
Dead Time
The dead time, which can be set to a number between 0 and 3600
seconds, is the period during which the switch will not send new
requests to a server that has failed to respond to a previous request.
This will stop the switch from continually trying to contact a server
that it has already determined as dead.