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How can I customize PRTG’s ports for core-probe-connections?

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I would like to change the ports that PRTG uses for core-probe-connections to free my available firewall ports according to my needs. How can I do that?

core-probe-connection port prtg reghack registry

Created on Jun 25, 2015 3:22:31 PM by  Martina Wittmann [Paessler Support]



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This article applies to PRTG Network Monitor 15.2.17.2896 or later

Setting PRTG’s Core-Probe-Connection Ports

As of PRTG version 15.2.17.2896 you cannot change the connection port for Remote Probes in the PRTG User Interface or in the PRTG Administration Tool anymore.

By default, PRTG uses the port 23560 for core-probe-connection which is sufficient in most cases. However, if you need to customize the port to free available ports in your firewall individually, you can change the port in the Windows registry. To do so please follow these steps:

Steps to Go

Caution: Please backup your system before manipulating the Windows registry!

Please be also aware that customizing the core-probe-connection port means that you have to change the port in the registry of the system running the PRTG core server as well as on every system running a remote probe.

1. Change the Port on the System Running the PRTG Core Server

Here you need to change the port in 2 different subkeys.

  1. Stop your PRTG Network Monitor services (Core and Probe) first.
  2. Then open the registry editor and navigate to the following subkey:
    1. On a 64-bit Windows system, navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Paessler\PRTG Network Monitor\Server\Probes
    2. On a 32-bit Window system, navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Paessler\PRTG Network Monitor\Server\Probes
  3. Find the ProbePort entry of the type REG_SZ. If your PRTG installation uses the default port, you should find 23560 as the value of ProbePort.
  4. Right-click on ProbePort and choose Change...
  5. A dialog box opens where you can enter your desired port number as the Value. Click OK to save your modifications.
  6. Secondly, navigate to the corresponding subkey
    1. On a 64-bit Windows system HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Paessler\PRTG Network Monitor\Probe
    2. Or on a 32-bit Window system HKEY_LOCAL_MACHINE\SOFTWARE\Paessler\PRTG Network Monitor\Probe
  7. Right-click on the ServerPort entry and change the Value entering your desired port number for core-probe-connections.
  8. Restart your PRTG Network Monitor services (Core and Probe) on this device.

2. Change the Port on a System Running a Remote Probe

  1. Stop your PRTG Network Monitor Probe service first.
  2. Open the registry editor and navigate to the following subkey:
    1. On a 64-bit Windows system, navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Paessler\PRTG Network Monitor\Probe
    2. On a 32-bit Window system, navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Paessler\PRTG Network Monitor\Probe
  3. Find the ServerPort entry of the type REG_SZ. If your PRTG installation uses the default port, you should find 23560 as the value of ServerPort.
  4. Right-click on ServerPort and choose Change...
  5. A dialog box opens where you can enter your desired port number as the Value. Click OK to save your modifications.
  6. Restart your PRTG Network Monitor Probe service on this device.

Note: Make sure you enter exactly the same value as port everywhere!


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Created on Jun 25, 2015 3:50:26 PM by  Martina Wittmann [Paessler Support]

Last change on Aug 13, 2015 11:15:43 AM by  Martina Wittmann [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.