Ethereal
Ethereal 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.
The functionality Ethereal provides is very similar to tcpdump, but it has a GUI front-end, and very powerful sorting and filtering options.
News
June 7, 2006
The world's most popular network protocol analyzer has a new home!
Gerald Combs, the creator of the Ethereal® network protocol analyzer, has accepted a position with CACE Technologies. CACE is best known for the popular WinPcap packet capture library.
Along with the move comes a new name for the project: Wireshark.
This site (http://www.wireshark.org/) is the new home of the project. We look forward to continuing our success as world-class network protocol analyzer under the new name, and we welcome you to join us.