We use Nagios XI to monitor our network infrastructure.It gives us early warning if device is critical.Interface is good. Review collected by and hosted on G2.com.

Adding devices should be make easy other than that it's great. Review collected by and hosted on G2.com.

The best thing about Nagios is its great ability to monitor networks, it is a great tool, it is open source and has a lot of documentation for its use. It is very powerful and you can monitor both hardware and software. Review collected by and hosted on G2.com.

The worst thing about Nagios is its great complexity; you need to be prepared to install this system and be able to manage it. Review collected by and hosted on G2.com.

Simplicity, easy to configure and multitude of monitoring metrics. Review collected by and hosted on G2.com.

No dislike as such. But it would be nice to have more advance monitoring/analysis as compared to other APM tools Review collected by and hosted on G2.com.

This product was easily-customized for our environment, for each data center being monitored. Review collected by and hosted on G2.com.

Sometimes there are issues monitoring Windows VMs inside of VMware. Review collected by and hosted on G2.com.

Nagios is ubiquitous when it comes to monitoring and plenty of resources on how to implement it are around. Review collected by and hosted on G2.com.

It could be a little user friendlier but that's what you get Review collected by and hosted on G2.com.

Nagios allows to monitor almost every service from the network Review collected by and hosted on G2.com.

It can be a bit confusing at the beginning. Review collected by and hosted on G2.com.

The little alert bar that tells you instantly whats going on. As well as the various map types allows you to explore your network looking for links to servers or switches that might have issues, it allows for rapid detection of exactly where your issues lie. Review collected by and hosted on G2.com.

A little too basic for most larger organisations Review collected by and hosted on G2.com.

Once it's set up, the web interface is great. We use it extensively so that those in dev ops can monitor the server environment. Very flexible and configurable. Review collected by and hosted on G2.com.

Can be cumbersome to set up at first. Lots of configuration files. The default templates do help. Review collected by and hosted on G2.com.

Nagios is very flexible and expandable. We can write our own plugins to custom fit our environment for the exact equipment and checks we need to see. Review collected by and hosted on G2.com.

Commercial version is a little expensive, however the "core" opensource version is the same engine and allows us to deploy the plugins we need with alerting we need for our network of over 3k devices and over 9k service checks. Review collected by and hosted on G2.com.

Nagios is reliable in monitoring network alerts. It also has a huge amount of information that it can use to view the monitoring Review collected by and hosted on G2.com.

The UI is terribly awkward and cumbersome. To modify anything you have to learn specific paths that are not intuitive. It is especially difficult to view details on the alerts that are coming in. Review collected by and hosted on G2.com.