[dns-operations] EDNS response only with DO=1

P Vixie paul at redbarn.org
Wed Sep 28 10:57:26 UTC 2016

They probably want to avoid fragmentation pain except where dnssec is involved.

On September 28, 2016 5:18:14 AM GMT+02:00, Mark Andrews <marka at isc.org> wrote:
>Can someone please explain the logic in building a DNS server that
>supports EDNS but only returning a EDNS response if DO=1?
>Mark Andrews, ISC
>1 Seymour St., Dundas Valley, NSW 2117, Australia
>PHONE:	+61 2 9871 4742		         INTERNET: marka at isc.org
>dns-operations mailing list
>dns-operations at lists.dns-oarc.net
>dns-operations mailing list

Sent from my Android device with K-9 Mail. Please excuse my brevity.
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