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Tshark port filter12/20/2023 The reason we use capture filters is that they are fast. If you are used to working with display filters, the syntax can feel less expressive. You are not able to filter for most protocols or expert information. Quicklinks: Linux Kernel Docs: Berkeley Packet FilterĪt first glance, capture filters might seem like the ugly twin of display filters. sudo tcpdump -i eth0 -w /tmp/dhcp.5 min | Ross Jacobs | MaTable of Contents It does not have a display filter option. It is available in most Linux systems even very small or special. Compare different syntax of the port filtering between the display and the capture filters in line above.Īll other options like -a, -b, -w, -s can be applied too.
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