Nagios Core Review

The primary use for this solution is basic network monitoring of a MPLS network.

Nagios Core informs me when my network elements are misfiring.

The most valuable feature is the performance parameters of the system. Nagios Core ill continuous monitor the endpoint for most common parameters on an obsessive mode and that will give you a better insight into the endpoint operating conditions

Please bear in mind that the Core edition is very limited in capability/features unlike the Enterprise XI . Inspite of this limitation it is a fantastic product to use at zero cost

I had deployed Nagios Core to monitor my MPLS network endpoints like routers and switches and also my firewalls and printers

It does a very good job I must say

An analogous product if I may refer to is Spiceworks which is a free tool for IT inventory and does an excellent job of monitoring inventory and reporting on the software etc on the endpoint

The core version is no match for the XI version. But the OEM should consider introducing some of the features of the XI version in the core version so that potential customers are actually compelled to to consider upgrading to the enterprise version

Supremely stable if you right size and maintain the system periodically

My old instance still runs on a Esxi VM with zero support on the hypervisor or the Nagios system its just a 2GB vRAM and single vCPU with about 40 GB storage and handles about 70 odd hosts and runs just fine apart from the log files maintenance its easy

No vendor involvement 

Tried many other similar products all demo versions hence did not take to production

Pretty straightforward to set up and configure basic system

I did it myself so no vendor is involved

Can't say coz my cost of investment is only personal effort , no money so its 100% ROI

Zero cost for the core edition but you need to know linux based apps configuration a=in general but in this case the installation and configuration guides make things a lot easy . A bit of patience and clear thinking you may end up doing a lot more in your setup than you expected !!!!

Tried many other similar products all demo versions hence did not take to production

Definitely try it out if you have zero budget 

Even if you don't have a budget restriction please do give it a try