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Sorry. I didn't missed some of the previous details here, but I see you 
mention pf below. Did you happen to see this?

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=276856

-Matthew

On 4/23/24 00:19, Gerrit Kühn wrote:
> Am Mon, 22 Apr 2024 15:57:42 +0200
> schrieb Dag-Erling Smørgrav <des@FreeBSD.org>:
>
>> Off the top of my head, it means the packet length according to its
>> header is longer than the capture length but the MF flag is not set.
>> Historically, it meant you needed to increase tcpdump's snaplen, but
>> these days it defaults to 256 kB so it shouldn't matter.  It might be a
>> bug in bpf, or an interaction between pf and bpf.
> So maybe this is rather a red herring than a pointer to the actual
> difference in packet handling.
>
>> There were changes in tftpd, but I don't know if that's relevant.
> Most certainly not as I didn't touch the server side. The tftpd there is
> certainly old, but it worked fine up to FreeBSD 13.3 on the router. It is
> the update to 14.0 that triggered the problem.
>
>
> cu
>    Gerrit



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