Nagios Support Forum

Hi Guys,

I am new to nagios. We have our wordpress website hosted in a third party Cloud VPS service called upcloud. Now, we want to set up nagios on a linux server hosted in a virtual machine at remote location. Just wondering how this can be setup, it's topology, configuration etc., Kindly, it would be much appreciated and helpful if you leave me your thoughts behind this process.

Best,
Harish

It's probably best if you read some docs on how Nagios works, then install it. Host alive checks are typically done with ICMP. It needs to be able to connect to the hosts on port 5666 by default if you plan to use an agent installed on hosts, such as NCPA or NRPE. If you prefer agentless monitoring 5666 isn't needed, but you'll need to then decide how you want to monitor hosts.
Nagios is very flexible so how to monitor is too large a subject to start explaining. You can use an agent, SNMP, SSH, passive checks, etc.