Dear Managers:
I only received one answer to the question I posted. Both,
the question and the answer, are included below.
Thanks to Jochen Bern <bern@TI.Uni-Trier.DE>.
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On Tue, 14 Apr 1998, Jochen Bern wrote:
> > I have a question for you. How can I do to make my DNS to
> > check the checksum for UDP packets ?
>
> You don't - it's the Job of the TCP/IP Stack, not of a single App
> using it. (For SunOS 4.x, edit the "udp_cksum =" Line in
> /usr/kvm/sys/netinet/in_proto.c and compile a new Kernel, and/or
> use adb to change the Value in the "Executable".)
>
> Note that in Order to "really have" UDP Checksums, you need to
> force BOTH Ends to have udp_cksum = 1.
>
> Regards,
> J. Bern
> --
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