# Nmap and Enumeration

* Scanning networks and hosts
  * Active – Make some noise. Interact with targets
    * Footprinting – Discovering the layout. Routing. DHCP.
    * Fingerprinting – Discovering what is running. Services
    * Nmap
      * Nmap -sn 192.168.50.1/24
        * Ping sweep
      * -sT TCP connect scan
      * -sS Syn Scan. Half open. Stealth scan. By default, it’s a stealth scan.
      * -p specifies ports
      * -t0 Slower scan. -t5 fastest.
      * -f fast mode
      * -sU UDP scan
      * -D decoy
      * -sI zombie host
      * -S spoof IP address
      * -f fragment packets
      * -O OS detection
      * -sV service and version
      * -A aggressive. Get as much info as possible.
    * Hping – alternative to Nmap
      * Hping3 -S -p 80
        * Syn scan on port 80
      * Hping3 -A -p 80
        * Ack scan
      * Timestamp shows updtime
    * Responder – MiTM tool
      * LLMNR vulnerability checker
  * Semi-passive – looks like normal traffic. Low and slow. Sparse.
  * Passive – Makes no noise. Listen to network traffic.
    * POFv3 is a passive scan.
    * Zeek/Bro – passive traffic scanner


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