TCP Dump

TCP Dump allows you to examine the header of each packet flowing over an interface or data link. To begin monitoring, select the desired interface from the "Monitor interface" popup and press "Start".

TCP Dump in IPNetMonitorX is a simple User Interface to the underlying unix "tcpdump" facility. Unix tcpdump has many options allowing you to specify in detail what packets you want to capture including protocols, interfaces, and link layer headers. The Options field accepts standard tcpdump options ("-n -p -t" for example to show numeric addresses, do not set promiscuous mode, and no time stamps). To learn more about the features of tcpdump, type "man tcpdump" from any terminal window.

Naturally you can run tcpdump directly from a terminal window if desired. The reason to incorporate TCP Dump in IPNetMonitorX is simple user convenience. You don't need to launch another application, be logged in as root, lookup the desired interface name, and IPNetMonitorX remembers your options between launches.

You can open and use multiple TCP Dump windows at the same time.

Warning: tcpdump on Mac OS X has a known bug when trying to monitor an interface that doesn't exist.