Nmap or Network Mapper, it’s a security scanner for scan ports, OS fingerprinting, banners and others ) in range of network or a specific machine, Nmap written by Faydor
Now we want to use this program to scan our system to know what banners will shown to attacker, and open ports that is not useful to my system and i have to close it or shutdown these services that works on these ports.
Let’s try using nmap to scan and how to use it to stop unused services (attackers could use these services) by using command nmap -sS localhost to scan my computer
Starting Nmap 5.00 ( http://nmap.org ) at 2011-06-28 00:51 EEST Interesting ports on example (127.0.0.1): Not shown: 996 closed ports PORT STATE SERVICE 25/tcp open smtp 111/tcp open rpcbind 631/tcp open ipp 80/tcp open http Nmap done: 1 IP address (1 host up) scanned in 0.
