Network Monitoring tool

I would like to know is there some free network monitoring tool which can be used to detect network devices node down alerts.

It should be a free tool like MRTG. It should be capable of detecting if any network device goes down or unreachable & alert e-mail should be generated.
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I use Nagios (

A lot of people in here like groundwork (
SrikantRajeevAuthor Commented:
if i install nagios in windows platform will it give me the same features like installing in linux
Have a look at Spiceworks. .You may find what you need there.
Powerful Yet Easy-to-Use Network Monitoring

Identify excessive bandwidth utilization or unexpected application traffic with SolarWinds Bandwidth Analyzer Pack.

SrikantRajeevAuthor Commented:
thanks for your reply. Let me ckeck spiceworks .
Kamran ArshadIT AssociateCommented:

There are plenty of options available. You may check out the below solutions;


SolarWinds Orion      Propriety
WhatsupGold      Propriety
Observer      Propriety
Adventnet OP Manager      Propriety
Overseer      Propriety
ServerAlive      Propriety
CommView      Propriety
AirMagnet      Propriety
MonitorMagic      Propriety

Open-Source NMS            

Ntop      LAMP based NMS
Bandwidthd      LAMP based NMS
Nagios      LAMP based NMS
Hyperic HQ      LAMP based NMS
Etherape      LAMP based NMS
MRTG      RRDTool
Cacti      RRDTool

Explaining the above list, If you can pay then Orion IP monitor from solarwinds, Adventnet OP Manager or WhatsUpGold are decent options. If you want to build some free open-source solution, then have a look at Cacti, Nagios or NTop.

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SrikantRajeevAuthor Commented:
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