Re: UDP zero checksums and v4 to v6 translators

[Christopher Morrow <morrowc.lists at gmail.com>]

On Tue, Jul 28, 2009 at 4:58 AM, Francis
Dupont<Francis.Dupont at fdupont.fr> wrote:
>  In your previous mail you wrote:
>
>   I strongly recommend that people read section 1 of RFC 2765. Here is some of
>   the relevant text:
>
>   Fragmented IPv4 UDP packets that do not contain a UDP checksum (i.e.
>      the UDP checksum field is zero) are not of significant use over
>      wide-areas in the Internet and will not be translated by the
>      translator.  An informal trace [MILLER] in the backbone showed that
>      out of 34,984,468 IP packets there were 769 fragmented UDP packets
>      with a zero checksum.  However, all of them were due to malicious or
>      broken behavior; a port scan and first fragments of IP packets that
>      are not a multiple of 8 bytes.
>
> => G. Miller message is 10 year old so should be even more valid today.
> Thanks for the quote, IMHO the subject can be closed (again).

it's 10 years old, from a single network link, in what I suspect was
VBNS+, so not even today's internet (scale or applications or users or
traffic levels or uses)

So I'm not sure it's applicable at all to today, or the discusison ongoing.