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Suddenly can't access PRTG's web-interface anymore

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I can suddenly no longer access PRTG's web-interface from remote hosts (local network, internet) using it's IP or DNS name anymore.

I can however access it locally on the PRTG server and monitoring is also still working.

What's the issue and how can it be fixed?

access localhost remote web-interface webserver

Created on Jul 14, 2015 6:34:42 AM by  Luciano Lingnau [Paessler Support]



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In some situations (IP Address change/update, NIC Driver Uptime, Virtual machine Integration Services, NIC addition, et cetera) PRTG may revert it's web-server address binding configuration.

In such cases, please proceed with the following:

  1. Open the PRTG Administration Tool on the PRTG Core Server.
  2. Head to the Web Server tab.
  3. Select the proper IP Address(es) for PRTG's Web Server. (It will likely be set to Localhost)
  4. Save and Close (Will restart PRTG with the new settings).
  5. PRTG should be reachable once again.

It's worth also checking the Probe Settings for Monitoring and Core Server tabs as they also hold settings for address bindings.

The Webserver tab

Created on Jul 14, 2015 6:42:31 AM by  Luciano Lingnau [Paessler Support]

Last change on Jul 14, 2015 8:57:12 AM by  Luciano Lingnau [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.