Nagios Core

4.1 (35)
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Open-source IT infrastructure monitoring & alerting solution

About Nagios Core

Nagios Core is an open-source IT infrastructure monitoring and alerting solution designed to help businesses monitor mission-critical infrastructure components such as network protocols, operating systems, applications, systems metrics, and network infrastructure via a unified platform. It enables IT professionals to receive alerts when critical components fail and recover via email, custom script, or text messages.

It provides a host of features such as FTP monitoring, infrastructure management, data visualization, analytics, mail server monitoring, user management, and more. Nagios Core offers an API, which lets businesses integrate the system with several third-party platforms, enabling businesses to push and pull data across systems.


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Starting Price

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one-time
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month

Pricing Options

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Features

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Integrations

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Ease of Use

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Value for Money

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Customer Service

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Reviews

Overall rating

4.1 /5
(35)
Value for Money
4.4/5
Features
4.1/5
Ease of Use
3.5/5
Customer Support
3.4/5

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Showing 5 reviews of 35
Samuel
Samuel
Overall rating
  • Industry: Telecommunications
  • Company size: 2–10 Employees
  • Used Daily for 6-12 months
  • Review Source

Overall rating

  • Ease of Use
  • Likelihood to recommend 10.0 /10

Reliable and comprehensive monitoring for startups and beyond

Reviewed on 2022/07/08

With Nagios Core we are solving the necessity to keep every single aspect of business critical...

With Nagios Core we are solving the necessity to keep every single aspect of business critical services we need to guarantee an SLA for. Having notifications and alerts for everything that is happening in your network is a great benefit to keep an edge over competitors. We are very pleased with this free software that delivers despite the difficult implementation.

Pros

Nagios is the way to go to actively monitor essentially every single aspect of your tech infrastructure. It is known that having a great response time in case of outages and proactively monitor services before a breakdown occurs is critical to keep customers happy. Nagios Core does exactly that and way more.

However, be warned, integration is terribly hard if you want to do advanced configuration. There is a lot of sysadmin/networking/software knowledge that needs to be covered before you get this very special type of monitoring so you may find yourself with small snags that don't let your dream monitoring service come alive but at the end, it is totally doable with Nagios Core.

Cons

Documentation could be better organized and a few additional GUIs for quick configuration would be a desirable thing. The main interface is very very lean, probably old-style with html4-like visuals and controls but it is effective and light. We basically had an issue with implementing custom plugins to monitor essential aspects of our business, Python scripting was needed but getting this to work effectively on Nagios was another issue.

Again, it has a steep learning curve but with time, you can master it.

William
William
Overall rating
  • Used Daily for 2+ years
  • Review Source

Overall rating

  • Ease of Use
  • Likelihood to recommend 10.0 /10

Robust and fully functional with a huge learning curve. To use this you need to invest a lot...

Reviewed on 2018/06/26

Monitoring of servers and individual services with easy to use notifications and alerts.

Monitoring of servers and individual services with easy to use notifications and alerts.

Pros

Nagios Core can do literally anything you need it to thanks to the amazing developer community and their ability to program custom addons.
Need to monitor servers all over the world? No problem.
Need to schedule outages and downtime? No problem.
Need to monitor a custom system that only a handful of people use? There is most likely a module for that as well.

Cons

To make it all work, you need to have advanced knowledge of linux command line administration and the ability to modify configuration files from the command line. Also, a few years of practice won't hurt to learn how to fully utilize Nagios Core.

Gabe
Overall rating
  • Industry: Information Technology & Services
  • Company size: 5,001–10,000 Employees
  • Used Daily for 2+ years
  • Review Source

Overall rating

  • Value for Money
  • Ease of Use
  • Customer Support
  • Likelihood to recommend 8.0 /10

The standard for open source monitoring and alerting that scales with the growth of your...

Reviewed on 2018/02/26

Pros

-High adoption: Many IT shops are familiar with Nagios Core, lots of discussion and documentation available for the product. If there are questions we have, we can rely on the skillsets of our administrators, and fall-back to online documentation/community support.

-Multi-platform endpoint support: Monitoring Windows/Linux servers/workstations is possible, and is leverage in our environment for hundreds of endpoints.

-Adding nodes to monitor is simple: Nagios core functionality resides in just a few configuration files. One for monitored endpoints, one for the each of those endpoints' services, and group policies for different profiles of alerting/escalation settings

-On-call escalations: We use Nagios Core to notify on-call staff of outages for services for multip teams, via email and SMS messages. Nagios is the foundation of on-call system.

-Integrates well with revision control support: configurations are managed within config files, and can be easily managed and control with popular code revision software.

Cons

-Config file housekeeping: If there are multiple people contributing and managing config files for Nagios, there is a high potential for confusion and messiness within the config files. Training or clear policies regarding organization and contributions to theconfig files is HIGHLY recommended to maintain sanity. Clearly documented practices regarding notification groups for montored endpoints is also HIGHLY recommended to decrease the chances of confusing alerting behaviors for critical systems. Committing files to a revision control software is highly recommended and a watchful eye on the consistency of contributions is key.

-Not a slick feature-rich experience out of the box: What you put into it is what you get out of it. Like many open source solutions, commitment and resources from the stakeholders managing this solution will be required in order to get the most from it.

Matt
Matt
Overall rating
  • Industry: Consumer Services
  • Company size: 1,001–5,000 Employees
  • Used Daily for 2+ years
  • Review Source

Overall rating

  • Value for Money
  • Ease of Use
  • Customer Support

Best free network monitoring tool.

Reviewed on 2018/02/27

Pros

Besides the price (Free), this tool gives and admin the ability to monitor hosts and services on that host easily, reliably and accurately.

Cons

Configuring your host and services is a bit time consuming. But once you have it done it's done. Has to run on Linux

Verified Reviewer
Overall rating
  • Industry: Hospitality
  • Company size: 2–10 Employees
  • Used for 2+ years
  • Review Source

Overall rating

  • Ease of Use
  • Likelihood to recommend 10.0 /10

Best network monitoring software

Reviewed on 2021/05/18

I have been part of inhouse development team to write plugins for Nagios. It was in-fact fun to...

I have been part of inhouse development team to write plugins for Nagios. It was in-fact fun to work. Learned a lot about this tool and how the monitoring works

Pros

Can be customized to monitor variety of network devices and services, can use plugins or develop own for custom work

Cons

Minimal support as compared to paid sotwares in the same niche. Not fully functional in the beginning and need a lot of customizations and developments to fulfil custom needs

Showing 5 reviews of 35 Read all reviews

Nagios Core FAQs

Below are some frequently asked questions for Nagios Core.

Nagios Core offers the following pricing plans:

  • Starting from: US$0.01/one-time
  • Pricing model: Free Version
  • Free Trial: Available

Nagios Core has the following typical customers:

Self Employed, 2–10, 11–50, 51–200, 201–500, 501–1,000, 1,001–5,000

Nagios Core supports the following languages:

English

Nagios Core supports the following devices:

We do not have any information about what integrations Nagios Core has

Nagios Core offers the following support options:

Chat

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