This article applies to PRTG Network Monitor 19 or later

Setting core-probe connection ports of PRTG

As of PRTG version 15.2.17.2896, you cannot change the connection port for remote probes in the PRTG web interface or in the PRTG Administration Tool anymore.

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

Steps to take

Note: Always back up your system before manipulating the Windows registry!

Also be 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 core server service and probe service first.
2. Open the registry editor and navigate to the following subkey:
   • On a 64-bit Windows system, navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Paessler\PRTG Network Monitor\Server\Probes
   • 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 ProbePort and select Change....
5. A dialog box opens where you can enter your desired port number as the Value. Click OK to save your modifications.
6. Then navigate to the corresponding subkey:
   • On a 64-bit Windows system, HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Paessler\PRTG Network Monitor\Probe
   • On a 32-bit Window system, HKEY_LOCAL_MACHINE\SOFTWARE\Paessler\PRTG Network Monitor\Probe
7. Right-click the ServerPort entry and change the Value by entering your desired port number for core-probe connections.
8. Restart your PRTG core server service and probe service on this machine.

2. Change the port on a system running a remote probe

1. Stop your PRTG probe service first.
2. Open the registry editor and navigate to the following subkey:
   • On a 64-bit Windows system, navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Paessler\PRTG Network Monitor\Probe
   • 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 ServerPort and select 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 probe service on this machine.

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

More

• Which ports does PRTG use on my system?
• How and where does PRTG store its data?