This article applies as of PRTG 22

Setting core-probe connection ports of PRTG

As of PRTG 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 must change the port in the registry of the PRTG core server system as well as on every remote probe system.

1. Change the port on the PRTG core server system

Here you must change the port in 2 different subkeys.

1. Stop the PRTG core server service and 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\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 the desired port number as the Value. Click OK to save the 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 the desired port number for core-probe connections.
8. Restart the PRTG core server service and PRTG probe service on this machine.

2. Change the port on a remote probe system

1. Stop the 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 the desired port number as the Value. Click OK to save the modifications.
6. Restart the PRTG probe service on this system.

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

More

• Which ports does PRTG use on my system?
• PRTG Manual: Data Storage