To get up and running with Ethereal, you will need to download and install Ethereal, and will also need to download and install WinPcap if you plan to capture packets with Ethereal. If you don't install WinPcap, you will not be able to capture packets with Ethereal. Go to http://www.ethereal.com/distribution/win32/ to download WinPcap
Editors’ Review
Download.com staff
Ethereal is a comprehensive network protocol analyzer used globally for troubleshooting, analysis, and development. It offers standard and unique features.
Pros
Widely used by network professionals globally
Supports troubleshooting, analysis, and development
Includes standard and unique features
Open source license enables community enhancements
network protocol analyzerEthereal is used by network professionals around the world for troubleshooting, analysis, software and protocol development, and education. It has all of the standard features you would expect in a protocol analyzer, and several features not seen in any other product. Its open source license allows talented experts in the networking community to add enhancements. It runs on all popular computing platforms, including Unix, Linux, and Windows.