Nagios Core vs Nmap comparison

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Nagios Core

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Executive SummaryUpdated on Oct 10, 2024

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Nmap and Nagios Core are prominent tools in network management. Nmap appears advantageous for security analysis and network discovery, whereas Nagios Core is preferred for comprehensive network monitoring.

Features: Nmap offers robust port scanning capabilities, OS detection, and flexible scripting options. It is ideal for detailed security audits and network inventory. Nagios Core provides extensive infrastructure monitoring, service availability alerts, and performance data collection.

Room for Improvement: Nmap could enhance its GUI for easier navigation, improve integration with other tools, and expand its reporting capabilities. Nagios Core could benefit from a simplified initial setup process, better user interface customization, and enhanced documentation for ease of use.

Ease of Deployment and Customer Service: Nmap is straightforward to deploy, requiring minimal configuration, with strong community support, making it ideal for quick assessments. Nagios Core needs a more involved setup due to its extensive capabilities, but supports third-party plugins for flexibility. Both have active community forums for troubleshooting and support.

Pricing and ROI: Nmap, being open-source, incurs no direct costs, providing an excellent ROI for network scans. Nagios Core, also open-source, might involve additional costs related to setup and training time, justified by its comprehensive monitoring abilities.

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To learn more, read our detailed Nagios Core vs. Nmap Report (Updated: June 2025).

Nagios Core vs. Nmap

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Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:

Categories and Ranking

Nagios Core

Ranking in Network Monitoring Software

10th

Average Rating

8.2

Reviews Sentiment

7.0

Number of Reviews

Ranking in other categories

IT Infrastructure Monitoring (9th)

Nmap

Ranking in Network Monitoring Software

11th

Average Rating

8.6

Reviews Sentiment

7.7

Number of Reviews

Ranking in other categories

No ranking in other categories

Mindshare comparison

As of July 2025, in the Network Monitoring Software category, the mindshare of Nagios Core is 2.8%, down from 3.2% compared to the previous year. The mindshare of Nmap is 0.5%, down from 0.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Network Monitoring Software

Featured Reviews

Nishith-Vyas

Tech Lead at STL Digital Limited

Valuable reporting and alert system with room for PDF export improvements

The NetEase reporting structure needs improvement, especially the availability report, which is weak. It should be generated automatically with minimal human intervention and should be exportable as a PDF. Besides that, an integrated PDF export feature for reports is necessary. Also, the alert mechanism and graphing mechanism need to be integrated properly into Nagios Core. Currently, integrating these requires advanced Linux knowledge. Integration of more visualization tools like Grafana and Prometheus for better graphing and visualization is also recommended.

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AntoSebastin

Cyber Security Consultant - APAC at Logon Software

Scans the network and identifies vulnerabilities on each machine

Nmap is mostly helpful during compliance checks. We run the scanner to see how many devices are on our network and find vulnerabilities in those that aren't compliant. We also use it monthly to scan our network and identify devices that aren't connected properly. This helps us detect any issues related to the operating systems of these devices. The tool's most valuable feature is its vulnerability scanning. It allows us to scan a specific range of IP addresses and discover devices within that range. This makes it easy to identify devices and view their details. Port scanning is crucial for network management tasks. It helps us identify vulnerabilities by finding open ports that may be unused or misconfigured. This tool makes it easy to detect such issues. The OS detection feature is great. Unlike other tools, Nmap provides accurate information about asset vulnerabilities, helping us easily detect and address them. Using Nmap provides value to the company, especially during compliance audits. It helps generate reports on assets, updates on workstations, and insights into network activities and potential attacks. Additionally, Nmap detects vulnerabilities and provides port details, allowing us to close unused ports on the client machines.

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Quotes from Members

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:

Pros

"The good thing about Nagios Core is it covers everything."

"Nagios monitors our servers, so we know if anything goes wrong and can solve the problem before it happens."

"I would rate the overall solution ten points out of ten."

"Monitoring with Nagios Core is helpful because it provides immediate alerts if something goes down, such as a server, or wireless router, or if there's a cable break. This allows us to respond promptly to any issues."

"What I like about Nagios Core is that it helps me ensure everything is running smoothly by checking the status of hosts and services."

"The most valuable feature of Nagios Core is the ability to check the availability of the server for network connectivity. Additionally, the interface is good."

"The solution's most valuable feature is that it offers proper alerting capabilities."

"The most valuable features are the reports and the way it generates the report in a graphical manner."

More Nagios Core pros

"The most important function, according to me, is the capability to use some arguments in the scanning. The solution's capability to go figure and do a deep dive, discovering information on specific aspects."

"It enables us to delve deeper and identify the services and open ports on the system and visualize this information on a dashboard automatically."

"Nmap has a powerful command line tool and a set of diagnostic features."

"It helps us secure the network infrastructure."

"The best feature of Nmap is that it lets me see useful information about each endpoint in my entire network environment. For example, I can see every single connection of the network as well as each and every port."

"The tool's most valuable feature is its scripts. These scripts prove beneficial when security features may obscure or block connections. Nmap helps identify vulnerabilities across different systems, including web servers and various server types."

"The real-time reporting feature of Nmap is particularly valuable. It generates detailed reports on the source and destination IP addresses, the protocols used, and the types of traffic."

"The solution detects the operating systems, which makes testing the software much easier before making the payload."

More Nmap pros

Cons

"The mapping is a little hard."

"The NetEase reporting structure needs improvement, especially the availability report, which is weak."

"The UI is a little outdated and graphics could be displayed in a better way."

"I would like to see more training videos."

"It's not that easy to install the product itself. Also, the UI is a bit hard for regular users to navigate through."

"The interface could be improved."

"The alerting mechanism in Nagios Core could be improved."

"t was a little hard to get our setup represented in the configuration."

More Nagios Core cons

"One of the drawbacks of the standard Nmap utility is that it does not come with a graphical user interface, unlike a number of other open-source alternatives such as Zenmap."

"They should deliver Playtech's username and password."

"There are concerns with the stability of the product, making it an area where improvements are required."

"The solution should increase the number of features under a free license."

"Customization is not very user-friendly in Nmap."

"There is room for improvement in the design, the GUI. It looks a bit odd. Maybe Nmap should improve it or add more widgets to make it more attractive, but the basic functionality is good and provides what we need."

"Since I started using Nmap, it has been completely based on the command prompt and I think it would help other users if they implemented a decent GUI as well."

"The solution is not that easy for a beginner to learn."

More Nmap cons

Pricing and Cost Advice

"We are using the free version of Nagios Core."

"The Nagios Core (PNP4Nagios + Core) is free and can be setup by Netadmin within a few hours. The only additional cost is the cloud server."

"Nagios Core is a cheap solution."

"Most the plugin features are free."

"The enterprise version has technical support. The version we are using is free."

"Nagios Core is an open source solution, and there are no licensing fees."

"The product is cheaply priced."

"We are using the open-source, unpaid version."

More Nagios Core pricing and cost advice

"The solution is free of cost."

"The solution is open source so it is free."

"Nmap is open source software, which suits us well because we are a manufacturing company and not an IT company, for example. If we were an IT company, we would probably need to pay for extra support or instead go for another software solution. But as it is, we don't have any need for high-end troubleshooting tools."

"It's an open-source product, and I haven't seen any premiums. Options are available for those who purchase, but for my use case, everything I need is available in the community and forums."

"Nmap is an open-source product. You don't need a license to install it."

"It's an open-source solution. Commerically, only the support service is available."

"The product's pricing is fine. The licensing options for Nmap include perpetual licenses and volume-based licenses. For perpetual licenses, once you purchase it, there's no need to invest in renewals. And for volume-based licenses, enterprise companies can use it multiple times based on the number of users or devices they need to scan. It's a pay-as-you-go model, similar to how you pay for what you use."

"I am using the free version of Nmap."

More Nmap pricing and cost advice

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Top Industries

By visitors reading reviews

Computer Software Company

15%

Government

10%

Manufacturing Company

Financial Services Firm

Computer Software Company

12%

Manufacturing Company

10%

Retailer

Government

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

Questions from the Community

What do you like most about Nagios Core?

What I like about Nagios Core is that it helps me ensure everything is running smoothly by checking the status of hosts and services.

What is your experience regarding pricing and costs for Nagios Core?

Nagios Core is a free and open-source product. We don't charge for the product itself, but we charge for the man-hour costs related to installation, configuration, ongoing operation, and maintenance.

What needs improvement with Nagios Core?

The dashboard should be improved. It's very simple. I don't have a very clear or specific suggestion. You can change the skin of the dashboard, however, it's good for me.

What do you like most about Nmap?

What is your experience regarding pricing and costs for Nmap?

I am using the free version of Nmap.

What is your primary use case for Nmap?

Nmap is used for network scanning to map the network, identify devices, and assess their status. It helps determine open ports and services running on a particular endpoint or server within an ente...

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Product Reports

Nagios Core

Download Nagios Core product report

Download Nmap product report

Overview

This is IT infrastructure monitoring's industry-standard, open-source core. Free without professional support services.

Nagios

Nmap ("Network Mapper") is a free and open source (license) utility for network discovery and security auditing. Many systems and network administrators also find it useful for tasks such as network inventory, managing service upgrade schedules, and monitoring host or service uptime. Nmap uses raw IP packets in novel ways to determine what hosts are available on the network, what services (application name and version) those hosts are offering, what operating systems (and OS versions) they are running, what type of packet filters/firewalls are in use, and dozens of other characteristics. It was designed to rapidly scan large networks, but works fine against single hosts. Nmap runs on all major computer operating systems, and official binary packages are available for Linux, Windows, and Mac OS X. In addition to the classic command-line Nmap executable, the Nmap suite includes an advanced GUI and results viewer (Zenmap), a flexible data transfer, redirection, and debugging tool (Ncat), a utility for comparing scan results (Ndiff), and a packet generation and response analysis tool (Nping).

Sample Customers

Airbnb, Cisco, PayPal, FanDuel

Lockheed Martin, Eastern Bank Boston, Perspecta, Harris Corporation, Discovery Communication

Nagios Core vs. Nmap