After following the generic ESD QuickStart, there are three common options that would be used for logging:
Ehtereal: Select Ethereal from the Administrators Snifers submenu. Start it using the GUI and gather packets. Ethereal is good for collecting and analyzing packets for some time but has complex fiultering and does not gather and provide the information in a very usable form for purposes other than network analysis by experts.
TCPDump: From the Xterm window, type 'tcpdump' followed by [ENTER] and it will start to show traffic from the eth0 port. For more details use 'man tcpdump' followed by [ENTER].
Logger: From the Xterm window, select the "Custom" X11 menu. Right click on in the open area of the screen, left click on "Custom". Use the GUI to configure desired logging and press the [TestRun] button to test your logging configuration. Simple output will appear in the xterm Window and detailed logs will appear in the logfiles you specified from the GUI. To stop the test run, type [CTRL]-C.