What is this?

This knowledgebase contains questions and answers about PRTG Network Monitor and network monitoring in general. You are invited to get involved by asking and answering questions!

Learn more

PRTG Network Monitor

Intuitive to Use. Easy to manage.
300.000 administrators have chosen PRTG to monitor their network. Find out how you can reduce cost, increase QoS and ease planning, as well.

Free Download

Top Tags

View all Tags

Which information does PRTG send back to Paessler?



Your Vote:



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]

1 Reply

Accepted Answer



Your Vote:



This article applies to PRTG Network Monitor 19 or later

How automatic update notifications work

Auto-updates of PRTG are powerful features that help you keep your PRTG installation up-to-date easily. With each new version, we provide new features and bugfixes.

Which domains does PRTG connect to?

To find out 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 click Check for Latest Update and Download under Settings | Auto-Update | Status, PRTG will connect to autoupdate.paessler.com to find out if the license key is entitled to a free update. If yes, it will download the update from one of our download servers, which is usually download.paessler.com.

Can I use a proxy?

By default, PRTG will try 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 |User Interface ("System & Website" in previous versions). For details about proxy settings, see PRTG Manual: System Administration—User Interface.

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. However, this will kill the update notification and auto-update functionality, of course.


Which servers does PRTG connect to for software auto-update and for activation?

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

Last change on Dec 4, 2020 3:12:39 PM by  Brandy Greger [Paessler Support]

Please log in or register to enter your reply.

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.