Network probe

Upon installation, PRTG automatically creates the first probe, namely the local probe in PRTG Network Monitor, and the hosted probe in PRTG Hosted Monitor. They run on the PRTG core server system and monitor all reachable devices, servers, and services from the system, using the sensors you configure.Working only with a local probe should suffice for LAN monitoring with PRTG Network Monitor and if you want to monitor one location only. For LAN monitoring with PRTG Hosted Monitor, at least one classic remote probe is required because the hosted probe can only reach targets that are publicly available via the internet.Scenarios That Require Remote ProbesThere are several situations that make it necessary to work with remote probes in the same LAN or in remote locations:You use PRTG Hosted Monitor and want to monitor your local network.You have more than one location and you need to make sure that services are available from all locations.Your network is divided into several LANs that are separated by firewalls, and the local probe cannot monitor specific services across these firewalls.You want to monitor systems in a secure network and you need a secure connection between the PRTG core server and that network.You want to sniff packets on a different computer.You want to monitor NetFlow data on a different computer.You experience performance issues with CPU-intensive sensors like Packet Sniffer or NetFlow sensors and need to distribute the load among more than one computer.You want to monitor a non-Windows system. This is only possible with a

LANIf you run PRTG as a cluster and you want to run remote probes outside your local network, you must make sure that your cluster nodes and the addresses that they use are reachable from the outside. Check your cluster node settings under Cluster before you install a remote probe outside your local network. Enter valid Domain Name System (DNS) names or IP addresses for both cluster nodes to reach each other and for remote probes to individually reach all cluster nodes. Remote probes outside your LAN cannot connect to your cluster nodes if they use local addresses.If you already have a remote probe installed outside your LAN and the remote probe is disconnected because of this, follow these steps:Uninstall the remote probe.Update the cluster node settings with addresses that are reachable from outside your LAN.Restart the PRTG core servers.Install the remote probe again. It then obtains the IP address or DNS name entries that it can reach.See also section Failover Cluster Configuration, section Remote Probes in a Cluster.Step 3: Configure the Failover NodeIf you have not yet done so, add a device that represents the target system on which you want to install the remote probe. Set the correct Windows credentials for this device.Open the device settings.In the Credentials for Windows Systems section, provide Domain or Computer Name, User Name, and Password for the target system. You can also inherit the credentials from the settings of a parent object in the device tree.Make sure that this user account has administration rights on the target system.Step 4: Confirm the Failover NodeIn the device tree, open the context menu of the target device.Select Device Tools | Install Remote Probe to open the install dialog in a new window.This option is only available for devices on the local probe of PRTG Network Monitor.Remote Probe Installation DialogThe install dialog includes four sections:Experimental feature notice and short introductionDetails: Overview of the device like Device Name, Status, Priority, Parent Probe, Parent Group, and Sensors by Status.Prerequisites: Make sure that you meet the requirements listed here. If not, PRTG cannot start the installation process. Open requirements are highlighted in red.Installation Unable to Start Because Prerequisites Are Not MetStart Probe Installation: Time estimation for the installation and installation start buttonIf all prerequisites are met, you can install the remote probe on the target system by clicking Install Remote Probe on "[device name]". Wait until the process has

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PRTG core server. All classic remote probes automatically download the new binaries via the SSL/TLS-secured probe connection or PRTG core server connection. Downloading the 4 MB file takes anywhere from a few seconds (in LANs) up to a few minutes (via internet connections), depending on the available bandwidth. As soon as the update is downloaded, the remote probe disconnects, installs the update, and reconnects to the PRTG core server. This takes between 20 and 100 seconds. Note that during the update phase, monitoring by the local probe can be affected because of the bandwidth that is required for the downloads.If a classic remote probe keeps disconnecting after an update, check if the server with the remote probe has two network connections with different IP addresses. Make sure that these addresses are in the list of allowed IP addresses in the Core & Probes settings.Delete Remote ProbeIf you delete a connected remote probe via the device tree, it stops the PRTG probe service on the remote probe system and sets the startup type to manual. We recommend that you additionally uninstall the remote probe on the remote probe system.If you delete a disconnected remote probe, it does not stop the PRTG probe service on the remote probe system and does not affect the startup type. The remote probe will continue to try to reconnect to the PRTG core server until you manually stop the PRTG probe service or uninstall the remote probe on the remote probe system.MorePAESSLER WEBSITEHow to connect PRTG