For more information, see Install NTP and synchronise servers in Additional server and software setup. All server system clocks synchronised, preferably by NTP.All server names resolvable by DNS, or manually using /etc/hosts.15551 ( Merlin) - used for state communication, such as check results.22 (SSH) - used for distributing configuration from master to poller nodes.The following TCP ports open on the poller nodes, to allow master nodes to successfully communicate with poller nodes:.Have suitable servers installed with the same architecture and OP5 Monitor version as the other servers in the environment, with the following configuration:.Before you add a new poller or peer to your environment, you must ensure that you:
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