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Network monitor

Hello,

I have noticed that my internal network performance has been decreased since a couple of days ago. I supposed that this behavior is due to the accumulation of traffic, but is there any useful tool that I can use in order to check on my overall network health and utilization at any given time?
A tool that can give me an idea of existing bottle necks in my network infrastructure I guess.

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giltjr

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SOLUTION

madunix

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Steve Jennings

Thats a great list madunix put together for you. But wht does your network look like? If you have a VZ FIOS router and a few workstations, most of that list would be useless. Give us a feel for what your architecture looks like for a more targeted answer.

Good luck,
Steve

madunix

Lately I am using http://cactiusers.org/wiki/CactiEZ , it is based on centos which is the same as redhat just that it is totally free. cactiEZ is an OS that has cacti, nagios and all the bells and whistles for network monitoring compiled as an OS. It's a stripped down version of cacti, with nagios, cacti, rrdtool, all the cacti plug-ins, snmp etc installed.
http://blog.cactiusers.org/
http://cactiez.cactiusers.org/