Eavesdrop is an application for listening in on TCP conversations on the network your computer is attached to. It can also open up tcpdump / Ethereal capture files for analysis.

See Notes for Newbies if you have not worked with a network sniffer before. Since this application only processes TCP, it may not capture all traffic on the machine you run it on.

Features:
• TCP conversation tracking
• show last TCP flags sent and flag history
• tcpdump filter syntax
• live syntax checking
• payload reconstruction - display in ASCII or HEX
• read tcpdump files
• remove or hide idle conversations to save memory or simplify the interface
• display images contained in the capture
• search for an IP or payload contents
• graphing of conversation meta-data (can also export data)

Requirements:
OS X 10.3-10.5
Universal Binary