Nmap is an open source free web discovery (Network Discovery) and security Audit (Auditing) tool. Software name Nmap is the abbreviation of Network Mapper. Nmap was originally created by Fyodor in 1997. With the participation of numerous volunteers from the open source community, the tool is becoming one of the most popular security essentials.
In general, Nmap is used to enumerate the list of network hosts, manage service escalation schedules, monitor host or service health. Nmap can detect whether the target machine is online, port open, the type of service to detect the operation and version information, detect the operating system and device type and other information.
The advantages of Nmap:
1. Flexible. Supports dozens of different scanning methods, and supports scanning of multiple target objects.
2. Strong. Nmap can be used to scan large computers on the Internet.
3. Portable. Support the main operating system: Windows/linux/unix/macos, etc., open source, easy to transplant.
4. Simple. Provides default operation to cover most functions, basic port Scan Nmap Targetip, full scan nmap–a targetip.
5. Freedom. As open source software, Nmap is free to use within the scope of the GPL license.
6. Rich documentation. The official website of NMAP provides a detailed description of the document. Nmap author and other security experts have written a number of nmap reference books.
7. Community support. Nmap is backed by a strong community team behind it.
8. Praise is added. Get a lot of rewards and appear in a lot of movies (such as The Matrix 2, die Hard4, etc.).
9. Popular. Currently Nmap has been listed as one of the necessary tools by thousands of security experts.
Nmap Use Tutorial