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Monitor outbound "well known ports"?

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Is there a way to monitor outbound “well known ports” through the DMZ? All that should be going out from our server is HTTP and FTP traffic. I’d like to be able to tell if something fishy is going on.

monitoring ports prtg

Created on Sep 1, 2011 6:28:43 PM by  awitek (0) 1



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Hello,

do you want to monitor the ports being open or not? Or the traffic on those ports?

best regards.

Created on Sep 5, 2011 2:00:15 PM by  Torsten Lindner [Paessler Support]



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Can I do both?

Created on Sep 7, 2011 7:09:55 PM by  awitek (0) 1



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Well, for TCP-Ports you could use the Port-Sensor in PRTG, but that would mean one sensor per TCP-Port. To monitor traffic on certain ports, you would have to use either Netflow/Sflow-Sensors or Packet Sniffing Sensors (which requires both certain networking gear of course).

Created on Sep 8, 2011 12:53:07 PM by  Torsten Lindner [Paessler Support]



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and would it be possible to monitor some application traffic ? like msn, skype, itunes etc... these application have signatures in the data/header to recongnize them.

Created on Sep 8, 2011 4:18:18 PM by  Sebastien (0) 1



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PRTG can only detect traffic from these applications if these applications run their traffic on a certain port (per application), then you can use Custom (Netflow/Sflow or Packet Sniffing) Sensors with your own channel definitions to monitor the traffic of these applications.

Created on Sep 8, 2011 6:21:52 PM by  Torsten Lindner [Paessler Support]



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