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How can I establish a secure web interface connection to PRTG?

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I would like to see the options I have using a secure connection to the PRTG web interface.

  • What possibilities do I have to connect securely?
  • Can I disable SSL and use an insecure connection?
  • What about the browser certificate warning?

browser certificate encryption https prtg secure ssl web-interface

Created on Feb 2, 2010 3:03:17 PM by  Daniel Zobel [Paessler Support]

Last change on May 16, 2019 6:02:09 AM by  Florian Weik [Paessler Support]



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This article applies to PRTG Network Monitor Version 19 or later

Secure PRTG Web Interface Connection

PRTG Network Monitor comes with a default SSL certificate so you can securely use the web interface through HTTPS out of the box. This way, the connection is encrypted and no unauthorized person is able to see your data.

However, because the default certificate does not match the domain name or IP address of your PRTG installation, a web browser will always show an alert ("the certificate is not correct") when it connects to this server (although the transmission is secure).

Overview: PRTG Web Interface Security Options

In the PRTG Administration Tool on the PRTG core server system, you can select different security options that specify how users connect to the web interface. The following table will give you an overview of the user's experience for the different options.

OptionSecurityUser experienceSteps to take
Disable SSLNone (Passwords and account information is not encrypted. Use only in secure LANs/VPNs, do not use for PRTG installations that are publicly visible on the internet.)User sees no warningIn PRTG Administration Tool, go to the web server section and set port to Insecure HTTP server (port 80)
PRTG default SSL certificateYes (unverified)User sees certificate warningIn PRTG Administration Tool, go to the Web Server tab and set port to Secure HTTPS server (port 443)
InstantSSL Free Trial certificate (90 days) - paid option for longer use availableYes (Class 1)User sees no warning - Specialty: Certificate can even be requested for a private IP address so the user sees no warning when using a private IP address to access the web interfaceIn PRTG Administration Tool, go to the Web Server tab and set port to Secure HTTPS server and install an InstantSSL Free Trial certificate
Paid extended options (for example, InstantSSL, GoDaddy)Yes, extended (up to Class 3)User sees green address bar and site appears in browser as "verified"In PRTG Administration Tool, go to the Web Server tab and set port to Secure HTTPS server and install a paid certificate

Step-by-Step Instructions

See the following article for more information and step-by-step instructions for installing SSL certificates: How can I use a trusted SSL certificate with the PRTG web interface?

We recommend that you use the PRTG Certificate Importer to install trusted certificates for PRTG.

Created on Feb 2, 2010 3:03:42 PM by  Daniel Zobel [Paessler Support]

Last change on May 20, 2019 9:58:38 AM by  Brandy Greger [Paessler Support]



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Set up your own Certification Authority

If you only access your PRTG server from within your own domain, you can create your own free trusted certificate, by setting up your own Certification Authority (CA).

This CA can handout certificates that will be trusted within your own network. You have to make sure that your users can contact and trust the CA.

See this Microsoft article on how to install your own CA http://technet.microsoft.com/en-us/library/cc756120(WS.10).aspx

Created on Feb 11, 2010 7:07:22 PM by  PRTG Tools Family [prtgtoolsfamily.com] (12,885) 3 4



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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.