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

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

System Administration Bar

System Administration Bar

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

During the failover cluster configuration, the cluster settings were predefined. You can change other cluster-related settings here. See the cluster status to see if all cluster nodes are properly connected.

icon-prtg-on-demandThis feature is not available in PRTG hosted by Paessler.

If you use PRTG on premises and open the system administration page from a different administration page, PRTG asks you to enter your credentials again for security reasons if 15 minutes (900 seconds) have passed since your last credential-based login. A dialog box appears. Enter your Login Name and Password for PRTG in the corresponding fields and confirm to continue.

Cluster Settings

icon-i-round-blueThis documentation refers to an administrator user accessing the PRTG web interface on a master node. If you use other user accounts, interfaces, or failover nodes, you might not see all of the options in the way described here. If you use a cluster installation, note that failover nodes are read-only by default.

In the table of the cluster settings, the information for each cluster node is written in one line.

Cluster Node Setup

Node Name

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

Node ID

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

Node State

Set the state for each failover node:

  • Active: Set the failover node to active.
  • Inactive: Set the failover node to inactive. It is then disabled in the cluster configuration. It is then not an active part of the cluster and does not appear in the cluster status anymore.

icon-i-round-blueThis setting is not available for the master node of a cluster. The master node is always set to Active.

IPs/DNS Names Used for Connections Between Nodes

Define the IP addresses or Domain Name System (DNS) names that are used for the connections between the cluster 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 is reachable from the second cluster node. Usually, this is the IP address or DNS name of the master node. Do this for all available cluster node connections, for example, if you run three cluster nodes, enter the address under which the second cluster node is reachable from the third cluster node into the field #3 => #2.

icon-square-cyanSee also section Failover Cluster Step by Step, Step 4 and following.

icon-i-round-redIf you use remote probes outside your local network or outside your network address translation (NAT), ensure that 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 are not able to connect.

icon-i-round-redSave your settings. If you change tabs or use the main menu without saving, all changes to the settings are lost.

icon-square-cyanFor how to set a cluster node into Maintenance Mode, see section PRTG Status—Cluster Status.

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



There are some settings that you must make in the PRTG Administration Tool. For more details, see the sections: