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nmap cheatsheet

XR00T

nmaping

Scan a single IP:

bash

nmap 192.168.1.1

Scan a range of IPs:

bash

nmap 192.168.1.1-20

Scan an entire subnet:

bash

nmap 192.168.1.0/24

Scan multiple IPs or subnets:

bash

nmap 192.168.1.1,192.168.1.5,192.168.2.0/24

Port Scanning

Scan specific ports:

bash

nmap -p 22,80,443 192.168.1.1

Scan a range of ports:

bash

nmap -p 1-1000 192.168.1.1

Scan all 65535 ports:

bash

nmap -p- 192.168.1.1

Scan top 1000 ports (default):

bash

nmap 192.168.1.1

Service and Version Detection

Detect services and versions:

bash

nmap -sV 192.168.1.1

Aggressive scan (includes OS detection, service detection, and more):

bash

nmap -A 192.168.1.1

OS Detection

Detect the operating system:

bash

nmap -O 192.168.1.1

Scan Types

TCP Connect Scan (default scan):

bash

nmap -sT 192.168.1.1

SYN Scan (stealth scan):

bash

nmap -sS 192.168.1.1

UDP Scan:

bash

nmap -sU 192.168.1.1

Ping Scan (discover hosts without port scanning):

bash

nmap -sn 192.168.1.0/24

Output Options

Save output to a file:

bash

nmap -oN output.txt 192.168.1.1

Save output in XML format:

bash

nmap -oX output.xml 192.168.1.1

Save output in a grepable format:

bash

nmap -oG output.grep 192.168.1.1

Timing and Performance

Adjust timing template (0-5, where 5 is the fastest):

bash

nmap -T4 192.168.1.1

Miscellaneous

Avoid DNS resolution:

bash

nmap -n 192.168.1.1

Disable reverse DNS resolution:

bash

nmap -n 192.168.1.1

Use a specific interface:

bash

nmap -e eth0 192.168.1.1

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