Two network tools

nmap is a network scanner that you can use to audit your network. Here is a scan of a computer looking for open ports and Operating System:

# nmap -O 192.168.0.10

Starting Nmap 4.52 ( http://insecure.org ) at 2008-09-10 00:14 EDT
Interesting ports on 192.168.0.10:
Not shown: 1709 closed ports
PORT STATE SERVICE
135/tcp filtered msrpc
137/tcp filtered netbios-ns
138/tcp filtered netbios-dgm
139/tcp filtered netbios-ssn
445/tcp filtered microsoft-ds
MAC Address: 00:XX:XX:AA:99:44 (Intel)
Device type: general purpose
Running: Microsoft Windows 2003|XP
Too many fingerprints match this host to give specific OS details
Network Distance: 1 hop

OS detection performed. Please report any incorrect results at http://insecure.org/nmap/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 15.992 seconds

Wireshark is a packet analyzer that you can use to see the packets of information coming in and out of your computer. It easily installs under Windows and Linux. Here we are using it to get the password and username from a fake myspace account:



Wireshark Fullscreen