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Monitor a specific port

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Hello, Our Public IP address recently got blacklisted an i'm trying to find out what computer did it.

Is it possible to generate a report of some sort that shows me what computer requested a TCP connection to a certain IP address on the internet?

I have PRTG setup to monitor our internet Cisco router, and is logging both Netflow and SNMP.

Does anyone know if this is possible?

Regards, Peter

netflow prtg reports

Created on Jun 8, 2015 4:42:48 AM by  cojaxx8 (1) 1



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Dear Cojaxx8

This is not directly possible with PRTG.

In principle, you can create a Netflow sensor and create channels by filter rules to search for a match. However you need to know the match in beforehand, you also rely on a new occurrence of the IP to IP connection which you are looking for.

PRTG cannot generate the list you like to have, it can only show you the result of pre-defined filter rules.

Created on Jun 9, 2015 1:36:48 PM by  Arne Seifert [Paessler Support]



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No worries. Thanks for information. I didn't think it would have been possible but thought there was no harm in asking.

Cheers Peter

Created on Jun 11, 2015 6:11:48 AM by  cojaxx8 (1) 1



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Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.