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Here are a couple of things to keep in mind about TCPDUMP and these examples.

1. I am not using the full path to TCPDUMP, which is usually located in `/usr/sbin/tcpdump'.

2. TCPDUMP required ROOT ACCESS or the program must have suid of root.

3. My public interface is `eth0', which is the interface that my examples use. If you wish to listen somewhere else, just replace it. To determine which interface you wish to use, first figure out what you want to see, then run `/sbin/ifconfig' and see what IP is assigned to what interface.

4. Running TCPDUMP in a work environment may not be acceptable. Check with the networking folks before you fire it off, and start reading other users' data.


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last modified: 2003-11-26 00:24:50