Nmap
Nmap is one of the best network security scanners out there. Nmap will scan for all the computers and services that are currently running on the network. This application will not only scan for the available services on the network like most other port scanners do, Nmap will try to gather as much information as it can about the remote computers such as which operating system they are using, device type, firewall information, current uptime & the vendor of the network card in use.Nmap is included within Ubuntu's repositories. So to install, use the following command:
sudo apt-get install nmap
NetCat
NetCat is a fantastic little program written by a guy called 'Hobbit' in 1991. This tool is used for reading and writing to network locations using connections on either UDP or TCP.
Again, NetCat is also in the repositories, so to install, run the following command:
sudo apt-get install netcat
Aircrack-ng
Aircrack-ng is the best tool out there for cracking and recovering 802.11 WEP & WPA-PSK keys. Once you have collected enough data packets, you are then able to recover the key from the data packets. This is defiantly a must have application to test your home wireless securityTo install:
sudo apt-get install aircrack-ng
Ettercap: it for seeing user-name and there passwords... example if someone logins into yahoo, you would have the username and password.
Driftnet: create a folder and activate driftnet. driftnet will add images to the folder so you can view them, like if someone was to go to an adult site you would know it!
dsniff: which it has urlsnarf. urlsnarf will let you see the urls of the people on your network goes to.
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