Listing 2. A Typical Nmap Scan
root@attacker# nmap -sS -O target.example.com
Starting nmap V. 2.53 by fyodor@insecure.org/
( http://www.insecure.org/nmap/ )
Interesting ports on target.example.com (192.168.0.2):
(The 1507 ports scanned but not shown below are
in state: closed)
Port State Service
21/tcp open ftp
22/tcp open ssh
23/tcp open telnet
25/tcp open smtp
37/tcp open time
79/tcp open finger
110/tcp open pop-3
111/tcp open sunrpc
113/tcp open auth
143/tcp open imap2
515/tcp open printer
901/tcp open samba-swat
2049/tcp open nfs
6000/tcp open X11
7100/tcp open font-service
TCP Sequence Prediction:
Class=random positive increments
Difficulty=2135704 (Good luck!)
Remote operating system guess:
Linux 2.1.122 - 2.2.14
Nmap run completed -- 1 IP address
(1 host up) scanned in 3 seconds
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