5 Ways to Use Nmap

For users of linux distro Backtrack especially users already familiar with the name Nmap (Network Mapper), designed to be able to scan the network, therefore a lot of system and network administrators who use it as one to secure jarangannya. But as much as if you never use a trick to the running Nmap, so this time I give 10 ways to use it.

1. Get a list of servers with a specific port is open :
  
   nmap -sT -p 80 -oG – 192.168.1.* | grep open

to change the port just replace the 80 with the number of ports to be used. command "man nmap" to see how the other 



2. For the current sacn ip in the network :

   nmap -sn 192.168.1.1-255

3. Ip to scan quickly :

   nmap -F 192.168.1.1

4. Learn about the host ports and remote OS detection :
  
   nmap -sS -P0 -sV -O 

   Where a single IP, name, or subnet
SS-TCP SYN scanning (also known as the half-open (semi-open) or stealth scanning)
-P0 allows you to disable ICMP ping.
SV-version allows the detection
Flag, which allows an attempt to identify the remote operating system

5. see and learn commands by typing a scan with nmap :

   nmap --help




Happy to use nmap