EtherSnoop

   EtherSnoop light is a free network sniffer, designed for capturing and analysis of the packets going through the network.It captures the data passing through your dial-up connection or network Ethernet card, analyzes the data and represents it in a readable form. EtherSnop light is a full configurable network analyzer program for Win32 environment. EtherSnop light sniffer presents the results of its work in a convenient and understandable format.
EtherSnoop Light Packet Sniffer has all of the standard features you would expect in a protocol analyzer, and several features not seen in any other product . With its powerful filter, you can customize what you need to capture and avoid those irrelevant packets from disturbing you.

EtherSnoop Packet Sniffer is a helpful tool for company manager, web page designers, concerned parents, LAN administrators, security professionals, programmers, or anyone who are interested in network traffic going through his PC or the whole LAN.