Port Monitoring Software

["Tinu Koshy (CISD)" <tkoshy () adco ae>]

Dear All,

I have been assigned the task to recommend a freeware / low value
purchase software for our helpdesk to monitor tcp port status & server
availability. Can anyone recommend a simple & efficient product that can
run on Windows XP / 2003. Basic requirements would be -

1. To check the ping status
2. Check whether particular TCP ports are responding
3. Have a dashboard to give a quick representation
4. Must have an smtp engine to alert via emails

I am aware of Big Brother, just wanted to check if anyone could vouch
for a better software.

Thanks,
Tinu Koshy

PS: If you know of a Linux based software, please do suggest that too.
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