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Chapter 4. Capturing Live Network Data

4.1. Introduction

Capturing live network data is one of the major features of Wireshark.

The Wireshark capture engine provides the following features:

  • Capture from different kinds of network hardware (Ethernet, Token Ring, ATM, ...).

  • Stop the capture on different triggers like: amount of captured data, captured time, captured number of packets.

  • Simultaneously show decoded packets while Wireshark keeps on capturing.

  • Filter packets, reducing the amount of data to be captured, see Section 4.9, “Filtering while capturing”.

  • Capturing into multiple files while doing a long term capture, and in addition the option to form a ringbuffer of these files, keeping only the last x files, useful for a "very long term" capture, see Section 4.7, “Capture files and file modes”.

The capture engine still lacks the following features:

  • Simultaneous capturing from multiple network interfaces (however, you can start multiple instances of Wireshark and merge capture files later).

  • Stop capturing (or doing some other action), depending on the captured data.


 
 
  Published under the terms fo the GNU General Public License Design by Interspire