Wireshark

Wireshark is the world's foremost network protocol analyzer. It lets you capture and interactively browse the traffic running on a computer network.

Free Open Source Mac OS X Windows Linux BSD

tcpdump

tcpdump is a common packet analyzer that runs under the command line. It allows the user to intercept and display TCP/IP and other packets being transmitted or received over a network to which the computer is attached.

Free Open Source Mac OS X Windows Linux BSD

SmartSniff

SmartSniff is a packet sniffer that capture TCP/IP packets and display them as sequence of conversations between clients and servers. You can view the TCP/IP...

Free Windows

Ethereal

Ethereal® is used by network professionals around the world for troubleshooting, analysis, software and protocol development, and education. It has all of the...

Free Open Source Windows Linux

LANGuardian

LANGuardian is the first and only deep packet inspection (DPI) software to provide SMB network managers with root cause information about network and user activity....

Commercial Mac OS X Windows Linux

Cocoa Packet Analyzer

Native Cocoa app for capturing and analyzing packets. Similar to Wireshark, but with a native interface (and less features). If you don't like the X11 GTK Wireshark...

Free Mac OS X

AirSnare

AirSnare is another tool to add to your Wireless Intrusion Detection Toolbox. AirSnare will alert you to unfriendly MAC addresses on your network and will also alert...

Free Windows