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 ...

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 ...

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 ...

In the previous article, I discussed the installation of three open-source packages on a computer running Linux to capture useful network statistics. Using Linux is economical simply because it can ...

The ifconfig and netstat commands are incredibly useful, but there are many other commands that can help you see what’s up with you network on Linux systems. Today’s post explores some very handy ...