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Specify listening port range

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Dear Paessler experts,

is it possible to define the listening port range as I m running a ticket system on the same server which needs incoming imap.

Thx a lot

definition imap port range

Created on Feb 24, 2021 10:40:52 AM by  Testuser2402 (0) 1



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Hi there,

Please note that we not recommend to run PRTG on a server where another server systems runs. However, please let us know what exactly you mean with the "Listening port range"? Blocks PRTG the IMAP port and therefore the ticket system does not work? If so, please note that PRTG should only block the ports which its needs and not simply a range. For example, the IMAP port will be used if you added a IMAP Sensor to the corresponding Probe.

Created on Mar 1, 2021 7:07:04 AM by  Moritz Heller [Paessler Support]



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Hello Moritz,

thanks a lot for your reply. That s actually my problem. I don't use an IMAP sensor at all. But as long as the PRTG services are active my ticket system doesn't receive any incoming emails. Whenever I disable them it works.

Created on Mar 1, 2021 7:10:28 AM by  Testuser2402 (0) 1



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Hi there,

In this case, PRTG should not bind port 143 (IMAP) or port 993 (IMAPS). Did you checked via cmd and "netstat -ano" which process binds the port? You can then check via "tasklist | find "CertainProcessID"" which certain process binds the socket.

Created on Mar 2, 2021 11:50:05 AM by  Moritz Heller [Paessler Support]



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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.