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Wireshark can't capture UDP packet

asked 2021-05-02 12:16:50 +0000

RabbitZ gravatar image

I use "Packet Sender" to send UDP packet to my debugging board, and use same PC Wireshark to capture the packet. but no data captured in wireshark. The data sending out is with "port = 2015", and I set the wireshark filter is "udp.port == 2015".

Something wrong with my wireshark or packet sender?

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answered 2021-05-02 13:03:40 +0000

grahamb gravatar image

Are you sure you're capturing in the same interface the UDP packets are being transmitted from?

It appears that, by default, Packet Sender doesn't bind to a particular source IP (and hence interface) unless specified, so will use the interface with the best route to the destination address.

The other issue may be your "debugging" board isn't responding to ARP requests so the sending PC can't get a MAC address to send to. Do you see ARP requests, if not try capturing with a less restrictive filter?

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Asked: 2021-05-02 12:16:50 +0000

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Last updated: May 02 '21