MacSniffer is a front end to the built-in 'tcpdump' packet sniffer on Mac OS X. MacSniffer allows you to view all of the traffic on a network connection, such as ethernet.
MacSniffer includes a filter editing interface and a filter library to easily construct and reuse packet filters to view a subset of all the traffic on the connection, such as just that destined for a specific host or port.
You can choose the level of detail you want captured, from just the minimal packet headers (showing source and destination hosts and ports) up to a full hex and ASCII dump of the packet contents.
MacSniffer can be useful for diagnosing many network problems, debugging client/server programs, and scanning for particular network exploits in real time.
