Nagios XI Review

It does exactly what we need: Alert us when something is wrong

We use Nagios because it does exactly what we need: Alert us when something is wrong and (with PNP) show some trend to figure out when or maybe how the problem started. The graphical output is for sure not state of the art, but we are not artists but rather techs ;) As a hosting business we have quite a homogenous infrastructure and use mostly snmp for fetching data in our own scripts. Once the basic setup for Nagios is done it is quite easy to automatically script new hosts when you add new machines or delete the old ones. However your choice might be different if you have to monitor IT of various customers with totally different infrastructure.
And finally there are apps for android, iPhone, etc so with just one look at your phone you see if everything is well.

**Disclosure: I am a real user, and this review is based on my own experience and opinions.
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author avatarit_user4401 (Developer at a transportation company with 1,001-5,000 employees)
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Nagios is a very useful tool for system administrators, which provide good monitoring for network and servers. It's free and from my point of view it's fast and efficient. Nagios is stable and has many plugins available for monitoring. The software is robust, but, as a con, is an absolute pain to configure it. There is a very intuitive dashboard page that the administrator can leave open on an extra monitor to view at any given time and it will even rotate between different pre-selected views if the administrator likes that.

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Highlights
The most valuable feature is the monitoring of processes.
The most valuable feature is its support for different types of devices, where it can use all of the equipment that you need.
This is a very good solution and it is simple to use, for any company.
The most valuable feature is the dashboard, where I can have a single screen that provides a summary for hundreds of servers.
An excellent solution that is easy and intuitive to implement.
The features I've found the most useful are the plug-ins, the fact that you can connect almost everything to it. That's very useful.
Nagios is a custom API manager, and we can expose custom APIs for our integration. This is a great feature.
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