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Learn pfSense 2.4
book

Learn pfSense 2.4

by David Zientara
July 2018
Beginner content levelBeginner
346 pages
10h 47m
English
Packt Publishing
Content preview from Learn pfSense 2.4

tcpdump

When you are troubleshooting network problems, you may find it necessary to use packet capturing, which is also known as packet sniffing. One way you can perform packet capturing is to use tcpdump, which is a command-line tool. Rather conveniently, tcpdump is a command -line tool. It can be used to capture and analyze packets, and details can either be displayed on screen or saved to a file. tcpdump uses the libpcap library to implement its packet capturing functionality.

You should give consideration as to which interface’s traffic you want to capture, as the results can be very different depending on which interface you monitor. In many cases, you probably want to focus on a single interface, whereas in others, you may want to capture ...

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Publisher Resources

ISBN: 9781789343113Other