Monitoring tool

[Ben Dover]

I am looking for a monitoring tool that will notify my cell phone when my 
FreeBSD box is down or off line.  It could be as simple as an application 
that runs on another FreeBSD box or Win box and pings the server and when it 
doesn't respond to pings it sends and alert to my cell phone.  I'm sure 
there are more sophisticated programs out there to alert server status and I 
would be interested in those too but something basic to get started would be 
fine.  Thanks

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