SHELL

scan port nmap

# nmap -p0- -v -A -T4 scanme.nmap.org

Starting Nmap ( http://nmap.org )
Completed Ping Scan at 00:03, 0.01s elapsed (1 total hosts)
Scanning scanme.nmap.org (64.13.134.52) [65536 ports]
Discovered open port 22/tcp on 64.13.134.52
Discovered open port 53/tcp on 64.13.134.52
Discovered open port 80/tcp on 64.13.134.52
SYN Stealth Scan Timing: About 6.20% done; ETC: 00:11 (0:07:33 remaining)
Completed SYN Stealth Scan at 00:10, 463.55s elapsed (65536 total ports)
Completed Service scan at 00:10, 6.03s elapsed (3 services on 1 host)
Initiating OS detection (try #1) against scanme.nmap.org (64.13.134.52)
Initiating Traceroute at 00:10
64.13.134.52: guessing hop distance at 9
Completed SCRIPT ENGINE at 00:10, 4.04s elapsed
Host scanme.nmap.org (64.13.134.52) appears to be up ... good.
Nmap scan report for scanme.nmap.org (64.13.134.52)
Not shown: 65530 filtered ports
PORT    STATE  SERVICE VERSION
22/tcp  open   ssh     OpenSSH 4.3 (protocol 2.0)
25/tcp  closed smtp
53/tcp  open   domain  ISC BIND 9.3.4
70/tcp  closed gopher
80/tcp  open   http    Apache httpd 2.2.2 ((Fedora))
|_HTML title: Go ahead and ScanMe!
113/tcp closed auth
Device type: general purpose
Running: Linux 2.6.X
OS details: Linux 2.6.20-1 (Fedora Core 5)
Uptime guess: 2.457 days (since Thu Sep 18 13:13:24 2008)
TCP Sequence Prediction: Difficulty=204 (Good luck!)
IP ID Sequence Generation: All zeros

TRACEROUTE (using port 80/tcp)
HOP RTT   ADDRESS
[First eight hops cut for brevity]
9   10.36 metro0.sv.svcolo.com (208.185.168.173)
10  10.29 scanme.nmap.org (64.13.134.52)

Nmap done: 1 IP address (1 host up) scanned in 477.23 seconds
           Raw packets sent: 131432 (5.783MB) | Rcvd: 359 (14.964KB)

top port scan nmap

 nmap --top-ports 20 www.example.com 

nmap scan all port

nmap -p- scanme.nmap.org