Wireshark doesn't capture all packets

asked 2020-05-07 09:47:50 +0000

benito
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I've changed router, and I bought a fritz box 7530. Now with wireshark, from my pc, I can capture packets that my pc send or receive but not the other packets from the lan (for example packets generated by my smartphone). What can I do to fix it?

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You clearly imply that something used to work, and doesn't now. Can you clarify what did work before? Was it wired or wireless? How did you do the collection, what OS? What adapter(s)?

Bob Jones ( 2020-05-07 14:36:50 +0000 )edit

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answered 2020-05-07 10:18:17 +0000

grahamb

flag of United Kingdom of Great Britain and Northern Ireland

23790 ●4 ●950 ●227 https://www.wireshark.org

You now have a switched network (the fritzbox is the switch) and you have to capture differently in that environment. See the Wiki page on Ethernet capture setup for more info.

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So, can't I capture all the packets from my pc? Or I have to use a ethernet cable connection to do that? Now my pc is connected by 5ghz wireless

benito ( 2020-05-07 10:26:44 +0000 )edit

The fritzbox is the central switch, all communications go through there whether wired or wireless. Some fritzboxes support capture on the device itself, see this question from the old Q&A site..

grahamb ( 2020-05-07 11:00:38 +0000 )edit

For traffic that is over WiFi then you may be able to perform capture on your local PC of packets transmitted between other devices and the Fritzbox but that is particularly difficult on a Windows OS due to driver issues.

See the wiki page on Wireless Capture for more info on that.

grahamb ( 2020-05-07 11:19:27 +0000 )edit

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Wireshark doesn't capture all packets

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