October 2002
Intermediate to advanced
206 pages
8h 30m
English
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Proactive System Management
An equally important part of maintaining a RADIUS implementation with the least downtime possible is keeping up with your system and examining it on a daily (or sometimes even more often) basis. There is a glut of monitoring tools on the market now, and there are as many freely available open source tools that can be had for the simple price of compilation and configuration. Most of these tools profile various metrics of your system in two key areas: service statistics and system statistics.
Service monitoring is designed to see two things: whether the service is functional, period, and then what kind of load under which the service is operating. The most effective way to test the first tenet is to have a packet generator send RADIUS packets emulating an incoming NAS connection. If a response is received from the RADIUS server, I know it’s operating. Beyond that, I want to see some statistics about the environment in which the service is being provided.
- Logons per second
This statistic measures the number of successful authentications (through counting the number of
Access-Acceptpackets) per second through your system. You can also monitor the start type ofAccounting-Requestpackets, although you lose the ability to see the reject ratio: how many requests were granted to every reject.Look for: abnormally high counts for this statistic. This would indicate a general network problem that would disconnect a user. He’d then attempt to reconnect, sometimes ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.