New Training: Use Nmap for Information Gathering
In this 6-video skill, CBT Nuggets trainer Bob Salmans teaches you how to use NMAP to identify hosts on a network and the services they’re running. Watch this new CompTIA,Cyber Security training.
Watch the full course: CompTIA PenTest+
This training includes:
34 minutes of training
You’ll learn these topics in this skill:
Using Basic NMAP Commands
Exploring PING Scans with NMAP
Scanning TCP and UDP with NMAP
Identifying Host Attributes with NMAP
Using NMAP Scripts
Bypassing Firewalls with NMAP
What Can NMAP Do for You?
Network Mapper, or "NMAP" for short, is a powerful open-source tool that will allow you to scan local or remote networks to develop a deep understanding of what's actually happening. Some of the most critical features include:
Nping: A tool to generate packets and analyze responses.
Zenmap: An advanced graphical user interface (GUI) to review and explore results.
Ndiff: A utility that allows you to compare different scan results.
Ncat: A tool that facilitates flexible data transfer, redirection, and has debugging features.
Although you can get nearly as advanced with NMAP as you can imagine, there are a few dozen basic commands that form the foundation of network mapping. These fall into several major categories, such as:
Target selection: Scanning single IPs, a range of IPs, or a host.
Port selection: Scanning single ports, a defined range, or all ports on the network.
Using scans with various tools: These include TCP connect and TCP SYN scan.
Viewing and interpreting results: You can easily export results in various file formats and save the data for other uses.
Leveraging scripts: NMAP will allow you to scan using specific unique scripts, default scripts, and update the script database with your preferences as needed.
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