How To Scan Any Network Easily

What is NMAP?

NMAP is used to scan:
Enterprise-scale networks
Small bussnise network
Conected devices
IoT devices and traffic

What Does Nmap Do?
At a practical level, Nmap is used to provide detailed, real-time information on your networks, and on the devices connected to them.

The primary uses of Nmap be broken into three core processes. First, the program gives you detailed information on every IP active on your networks, and each IP can then be scanned. This allows administrators to check whether an IP is being used by a legitimate service, or by an external attacker.

How To Use Nmap

Nmap is straightforward to use, and most of the tools it provides are familiar to system admins from other programs. The advantage of Nmap is that it brings a wide range of these tools into one program, rather than forcing you to skip between separate and discrete network monitoring tools.

In order to use Nmap, you need to be familiar with command-line interfaces. Most advanced users are able to write scripts to automate common tasks, but this is not necessary for basic network monitoring.

Nmap Tutorial and Examples:

Ping Scanning

nmap -sp 192.100.1.1/24

  1. Port

sS TCP SYN scan

sT TCP connect scan

sU UDP scans

sY SCTP INIT scan

sN TCP NULL

  1. OS Scanning
    OS scanning is one of the most powerful features of Nmap. When using this type of scan, Nmap sends TCP and UDP packets to a particular port, and then analyze its response. It compares this response to a database of 2600 operating systems, and return information on the OS (and version) of a host.

To run an OS scan, use the following command:

nmap -O

NMAP download link: https://nmap.org/

5 Likes