Wireshark Good network sniffer Submitted by Cyberwarz1 on Fri, 05/07/2010 - 00:42 Wireshark  is a free and open-source  packet analyzer . It is used for  network  troubleshooting, analysis, software and communications protocol  development, and education. Originally named Ethereal, in May 2006 the project was renamed Wireshark due to trademark issues.   Wireshark