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Web UI cannot be reached out outside the server




I have a PRTG network monitor server recently been powered off, I just power it on today, but found it cannot be opened outside the server, I can only reached out it from its loopback address(, by checking the server's interfaces, I found no public listening on port 80 or 443, PRTG Core Server Service and PRTG Probe Service are all running as expected, what I can do to let its web services listen on outside of the server?

Thank you in advance:)

network prtg-network-monitor restart

Created on Jan 10, 2021 4:00:43 AM

1 Reply



Hello there,

The first step would be opening the PRTG Administration Tool and checking the PRTG Webserver tab. Here you can configure which port should be available for the according available network interfaces.

Kind regards,
Birk Guttmann, Tech Support Team

Created on Jan 15, 2021 10:09:26 AM by  Birk Guttmann [Paessler Support]

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.