Packet capture is one of the most fundamental and powerful ways to do network analysis. You can learn virtually anything about what is going on within a network by intercepting and examining the raw ...

Part I of this article discussed tcpdump, a command-line utility that sniffs network traffic. Now let's see what it can do. Scenario 1: Established Telnet Connection Using tcpdump we can analyze the ...

Think you know what's happening on your network? Pull out tcpdump and you might be surprised how much it can tell you. In some ways, the tcpdump command may seem like a pretty basic tool for grabbing ...

For a class project I had to code an TCP/UDP echo client and server and then capture the resulting packets using TCPDUMP. Here is the output for sending 1000 characters (1000 bytes) from a file from ...

Tcpdump may not have a slick frontend like other packet analyzers such as Wireshark and Ettercap, but this command line tool makes up for its lack of fancy graphics with power and flexibility. In this ...