AirSnort is a wireless LAN (WLAN) tool which recovers encryption keys. AirSnort operates by passively monitoring transmissions, computing the encryption key when enough packets have been gathered. 802.11b, using the Wired Equivalent Protocol (WEP), is crippled with numerous security flaws.
SNORT can be used to monitor the traffic that goes in and out of a network. It will monitor traffic in real time and issue alerts to users when it discovers potentially malicious packets or threats on Internet Protocol (IP) networks.
Ettercap is a suite for adversary-in-the-middle attacks on LAN that includes sniffing of live connections, content filtering on the fly, and many other features. It supports active and passive dissection of many protocols (including ciphered protocols) and includes many features for network and host analysis. It is a free and open source tool that can launch Man-in-the-Middle attacks. You can use this tool for network analysis and security auditing and it can be run on various operation systems, like Linux, BSD, Mac OS X and Windows. Ettercap can sniff network traffic, capture passwords, etc.
As the name implies, dsniff is a network sniffer, but it can also be used to disrupt the normal behavior of switched networks and cause network traffic from other hosts on the same network segment to be visible, not just traffic involving the host dsniff is running on.
