<%NUMBERING1%>.<%NUMBERING2%>.<%NUMBERING3%> PRTG Manual: System Administration—Cluster

To open system administration, select Setup | System Administration from the main menu. Click on the tabs to change the different settings.

System Administration Bar

System Administration Bar

You can define the following aspects of your PRTG system setup:

In the cluster settings you can define the cluster settings. During Failover Cluster Configuration, the cluster settings were already pre-defined. See the cluster status to see if all nodes in your cluster are properly connected.


Note: If you open the system administration page from another administration page and 15 minutes (900 seconds) have passed since your last credential-based login, you will be asked to enter your credentials again for security reasons. A dialog box will appear. Simply enter your Login Name and Password for PRTG in the corresponding fields, confirm and you're done.

Cluster Settings

Note: This documentation refers to the PRTG System Administrator user accessing the Ajax interface on a master node. For other user accounts, interfaces, or nodes, not all of the options might be visible in the way described here. When using a cluster installation, failover nodes are read-only by default.

You can set up two, three, four, or five nodes in one cluster for PRTG on premises. In the table of the cluster settings, the information of each node is written in one line.

Cluster Node Setup

Node Name

Enter the name of the node (for display purposes).

Node ID

The ID is unique for every node. We recommend that you use the default value.

Node State

You can set the state for every failover node. Choose between:

  • Active: Set the node to be active.
  • Inactive: Set the node to be not active. It will be disabled in the cluster configuration. It will then be not an active part of the cluster and will not appear in the cluster status any more.

This setting is not available for the master node of a cluster. The master is always set to Active.

IPs/DNS Names Used for Connections Between Nodes

Define the IP addresses or DNS names that will be used for the connections between the nodes. You can enter different values for every node–node connection.

For example, in the field #2 => #1, enter the address under which the master node server can be reached from the second cluster member. Usually, this is the IP address or DNS name of the master node. Do this for all available node connections, for example, if you run three nodes, enter the address under which second node can be reached from the third cluster member into the field #3 => #2.

Please see also section Failover Cluster Step by Step, Step 4 and following.

Note: If you use remote probes outside your local network or outside your Network Address Translation (NAT), ensure the IP addresses or DNS names you enter here are valid for both the cluster nodes to reach each other and for remote probes to reach all cluster nodes individually. These addresses must not be private and have to be reachable from the outside, otherwise your remote probes will not be able to connect.

Click Save to store your settings. If you change tabs or use the main menu, all changes to the settings will be lost!

For how to set a cluster node into Maintenance Mode, please see PRTG Status—Cluster Status.

The entire setup process for a cluster requires several different steps. For more information and step-by-step guidance, please see Failover Cluster Configuration section.




There are some settings that you must make in the PRTG Administration Tool, available as native Windows application. For more details, please see the sections:

Keywords: Cluster Connection,Configure,Configure Cluster