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Port sensor

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I have configured a port sensor to check a Windows server on tcp/445 every minute. When I look at the statistics & graph for that sensor, I often see periods of 60% or 80% downtime. When I look at the statistics table for each interval, I sometimes see two or more contigious periods where the 'Available' field is empty and 'Downtime' is some percentage, say 67%.

I don't understand how a port sensor can be anything other than 0% or 100% down in any interval, especually over more than one contigious interval. If there was no response to the tcp connection, hence the empty 'Available' field, how can if be 67% down?!

downtime tcp tcp-port

Created on Nov 18, 2011 10:32:17 AM by  phil_dotchon (0) 1



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Dear Phil,

can you please send us some screenshots showing this issue to support@paessler.com?

best regards.

Created on Nov 21, 2011 11:14:24 AM by  Torsten Lindner [Paessler Support]



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