Update port_scanning.md

# All out monsterscan

nmap -vvv -Pn -A -iL listOfIP.txt

# Fast scan

nmap 10.11.1.X -F

# Only scan the 100 most common ports

nmap 10.11.1.X --top-ports 100

```

## Nmap

### "Stealthy" -sS

By adding the -sS flag we are telling nmap to not finalize the three way handshake. It will send a syn, receive syn-ack (if the port is open), and then terminate the connection. This used to be considered stealthy before, since it was often not logged.

By adding the **-sS** flag we are telling nmap to not finalize the three way handshake. It will send a syn, receive syn-ack (if the port is open), and then terminate the connection. This used to be considered stealthy before, since it was often not logged.

In the flag I imagine that the first **s** stands for scan/scantype and the second **S** stands for **syn**.

If we do not want to create a connection we can add the `-sS` flag

So **-sS** can be read as **scantype syn**

### UDP scan