Wireshark

Wireshark 1.7

Free
Wireshark is a network packet analyzer that will try to capture network packets
4.5  (130 votes)
4.5
2.2.7 (See all)

Wireshark is a network packet analyzer that will try to capture network packets and tries to display that packet data as detailed as possible. This application can be used by network administrators use it to troubleshoot network problems. Wireshark can capture traffic from many different network media types - and despite its name - including wireless LAN as well.

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