my-docs/Security & Networking/nmap/Nmap.md

How to Install Nmap and Use Nmap for Scanning

1. Update your system:

sudo apt-get update

2. Install Nmap:

sudo apt install nmap

3. Scan a single IP address:

nmap [your_IP]

4. Scan multiple IP addresses:

nmap [your_IP1,your_IP2]

5. Scan a range of IP addresses:

nmap [your_IP1-your_IP100]

6. Scan targets from a text file:

nmap -iL filename.txt

7. Check for live systems:

nmap -sn [your_IP]

8. Ping sweep:

nmap -sP [your_IP]

9. If ICMP is blocked:

nmap -PN [your_IP]

10. Scan specific port:

nmap -p [your_port] [your_IP]

If ICMP is blocked:

nmap -PN [your_IP] -p [your_port]

11. Scan multiple ports:

nmap -p [port1,port2,port3-port6] [your_IP]

12. Specify protocol:

nmap -p http,https,ftp [your_IP]

13. Scan TCP ports:

nmap -p T:[port,port2] [your_IP]

14. Get more information:

nmap -p [your_port] -sV [your_IP]

15. Detect operating system:

nmap -O [your_IP] -p [your_port]

16. Fast scan (top 100 ports):

nmap -F [your_IP]

17. Aggressive scan:

nmap -A [your_IP] -p [your_port]

18. Whois lookup:

nmap -p [your_port] --script whois-ip [your_IP_or_domain]

19. IP geolocation:

nmap -p [your_port] --script ip-geolocation-* [IP]

20. Detect Web Application Firewall (WAF):

nmap -p [your_port] --script http-waf-detect [your_domain]

21. Save results to a text file:

nmap -Pn -p [your_port] [your_IP] -oN your_filename.txt

22. Save results to an XML file:

nmap -Pn -p [your_port] [your_IP] -oX filename.xml

23. Save results to a grepable file:

nmap -Pn -p [your_port] [your_IP] -oG filename.gnmap

24. Save results to all formats:

nmap -Pn -p [your_port] [your_IP] -oA filename

25. Scan top ports:

nmap --top-ports [number] [your_domain]

26. Scan top ports and show open ones:

nmap --top-ports [number] [your_domain] --open

27. Check for open ports using different scan types:

nmap -sT [your_IP]    # TCP Scan
nmap -sS [your_IP]    # SYN Scan
nmap -sX [your_IP]    # XMAS Scan
nmap -sF [your_IP]    # FIN Scan
nmap -sN [your_IP]    # Null Scan