Notes

nmap

discover hosts and services on a network, find out what operating system they are using

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System Administration
Nmap networking security cheatsheet
  • find hacking targets
  • vulnerabilities that you can exploit
  • see what ports are open (default ports can tell you what services are running on these ports)
1# Scan entire network (ping an entire network to see what devices are online)
2nmap -sP 10.7.1.0
3
4nmap -v -A www.badstore.net
5
6sudo nmap -A 10.77.1.0/24
  • -v: verbose output
  • -A: Enable OS detection, version detection (for protocols), script scanning, and traceroute
  • -O: Enable OS detection
1sudo nmap -sT -p 80,443 10.7.1.0/24
  • sT TCP connect, i.e. full open scan

This scanning of entire networks might be blocked by firewalls (IDS: Intrusion Detection System) and may even be illegal. so you use -sS instead, the S is for stealthy

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