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Which information does PRTG send back to Paessler?



For update notifications, which URLs does PRTG call in order to contact the Paessler web servers?

domains privacy prtg update-check urls

Created on Nov 17, 2011 5:01:02 PM by  Daniel Zobel [Product Manager]

Last change on May 6, 2019 11:44:35 AM by  Maike Guba [Paessler Support] (2,404) 2 1

3 Replies

Accepted Answer



This article applies as of PRTG 22

How automatic update notifications work

Auto-update is a powerful feature that helps you keep your PRTG installation easily up to date. With each new version, we provide new features and bug fixes.

Which domains does PRTG connect to?

To check if a new version is available, PRTG sends an HTTP request once every 24 hours (and once per restart) to updatecheck.paessler.com.

If the update check finds a new version, or if you go to Setup | Auto-Update | Status and click Check for Latest Update and Download, PRTG connects to autoupdate.paessler.com to check if the license key is entitled to a free update. If yes, it downloads the update from one of our download servers, usually download.paessler.com.

Can I use a proxy?

By default, PRTG tries to use a direct internet connection. If a proxy is mandatory in your network, log in to the PRTG web interface and configure your proxy settings under Setup | System Administration | Core & Probes (System & Website in previous versions).

Can I block this traffic?

You could block this traffic by adding entries to the local hosts file that point to a non-existent IP address. However, this disables the update notification and auto-update functionality.


Created on Nov 17, 2011 5:20:49 PM by  Daniel Zobel [Product Manager]

Last change on Jan 2, 2023 2:45:07 PM by  Brandy Greger [Paessler Support]



I can't find the proxy settings in the Setup | System Administration |User Interface that this article mentions. Where are the proxy settings?

Created on Jun 14, 2021 4:13:44 AM




Thank you for reporting this mistake.

The Proxy settings are effectively available under System Administration | Core & Probes in the latest versions of PRTG, I have updated the links accordingly.


Created on Jun 15, 2021 5:48:11 AM by  Florian Lesage [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.