Monitoring Tools

nmap

Free and open source network discovery and security auditing utility.

Overview

Nmap is a free, open source tool for network discovery and security auditing that identifies hosts, services, operating systems, and firewall configurations using raw IP packets and advanced scanning techniques.

Updated Oct 23, 2026

10 things

What nmap has

Apps

Windows
macOS
Linux
FreeBSD
NetBSD
OpenBSD

Extras

An online space where users can connect, share tips, and help each other. One of 5 Monitoring Tools tools with community.
Digital books provide information and guidance that readers can use to learn about a topic.
An educational resource that explains a topic and helps readers build their knowledge. One of 4 Monitoring Tools tools with guide.
In-depth written resources that explain a topic or share information and analysis.

10 features

Key Features

Discovery network
Nmap ("Network Mapper") is a free and open source utility for network discovery and security auditing.
Network scanning
It was designed to rapidly scan large networks, but works fine against single hosts.
Network mapping
Flexible : Supports dozens of advanced techniques for mapping out networks filled with IP filters, firewalls, routers, and other obstacles.
Scanning techniques
This includes many port scanning mechanisms (both TCP & UDP), OS detection , version detection , ping sweeps, and more.
Large network scans
Powerful : Nmap has been used to scan huge networks of literally hundreds of thousands of machines.
Simple scanning
Easy : While Nmap offers a rich set of advanced features for power users, you can start out as simply as "nmap -v -A targethost ".
Command-line and GUI
Both traditional command line and graphical (GUI) versions are available to suit your preference.
Prebuilt binaries
Binaries are available for those who do not wish to compile Nmap from source.
Documentation
Well Documented : Significant effort has been put into comprehensive and up-to-date man pages, whitepapers, tutorials, and even a whole book! Find them in multiple languages here .
User community
Supported : While Nmap comes with no warranty, it is well supported by a vibrant community of developers and users.

Pros and cons

Pros

Completely free and open source with full source code available.
Highly flexible with numerous scanning techniques and scripting capabilities.
Supports a wide range of operating systems and network environments.
Well-documented with extensive guides, tutorials, and community support.
Includes both command-line and graphical interfaces for different user preferences.

Cons

No official commercial support or warranty provided.
Steep learning curve for beginners due to extensive features and command-line usage.
Limited native integration with other enterprise security tools.
User interface (Zenmap) is less modern compared to commercial alternatives.
Primarily a network scanning tool, not a full security management platform.

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Featured Video

See nmap at work before you try it.

Watch on YouTube

0 questions

Frequently Asked Questions

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Community reviews

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No written reviews yet. Be the first to share your experience.

Tried this tool? Share your experience.

Write a review

10 things

What nmap has

Apps

Windows
macOS
Linux
FreeBSD
NetBSD
OpenBSD

Extras

An online space where users can connect, share tips, and help each other. One of 5 Monitoring Tools tools with community.
Digital books provide information and guidance that readers can use to learn about a topic.
An educational resource that explains a topic and helps readers build their knowledge. One of 4 Monitoring Tools tools with guide.
In-depth written resources that explain a topic or share information and analysis.

10 features

Key Features

Discovery network
Nmap ("Network Mapper") is a free and open source utility for network discovery and security auditing.
Network scanning
It was designed to rapidly scan large networks, but works fine against single hosts.
Network mapping
Flexible : Supports dozens of advanced techniques for mapping out networks filled with IP filters, firewalls, routers, and other obstacles.
Scanning techniques
This includes many port scanning mechanisms (both TCP & UDP), OS detection , version detection , ping sweeps, and more.
Large network scans
Powerful : Nmap has been used to scan huge networks of literally hundreds of thousands of machines.
Simple scanning
Easy : While Nmap offers a rich set of advanced features for power users, you can start out as simply as "nmap -v -A targethost ".
Command-line and GUI
Both traditional command line and graphical (GUI) versions are available to suit your preference.
Prebuilt binaries
Binaries are available for those who do not wish to compile Nmap from source.
Documentation
Well Documented : Significant effort has been put into comprehensive and up-to-date man pages, whitepapers, tutorials, and even a whole book! Find them in multiple languages here .
User community
Supported : While Nmap comes with no warranty, it is well supported by a vibrant community of developers and users.

Pros and cons

Pros

Completely free and open source with full source code available.
Highly flexible with numerous scanning techniques and scripting capabilities.
Supports a wide range of operating systems and network environments.
Well-documented with extensive guides, tutorials, and community support.
Includes both command-line and graphical interfaces for different user preferences.

Cons

No official commercial support or warranty provided.
Steep learning curve for beginners due to extensive features and command-line usage.
Limited native integration with other enterprise security tools.
User interface (Zenmap) is less modern compared to commercial alternatives.
Primarily a network scanning tool, not a full security management platform.

You?

Be the first to rate nmap

Your review helps others make better decisions. No account needed. Takes about 10 seconds.

Featured Video

See nmap at work before you try it.

Watch on YouTube

0 questions

nmap

Overview

What nmap has

Apps

Extras

Key Features

Discovery network

Network scanning

Network mapping

Scanning techniques

Large network scans

Simple scanning

Command-line and GUI

Prebuilt binaries

Documentation

User community

Pros and cons

Pros

Cons

Be the first to rate nmap

Featured Video

Frequently Asked Questions

What nmap has

Apps

Extras

Key Features

Discovery network

Network scanning

Network mapping

Scanning techniques

Large network scans

Simple scanning

Command-line and GUI

Prebuilt binaries

Documentation

User community

Pros and cons

Pros

Cons

Be the first to rate nmap

Featured Video

Frequently Asked Questions

More in Monitoring Tools

More in Monitoring Tools