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List:       dns-operations
Subject:    Re: [dns-operations] DHL.com failures
From:       Viktor Dukhovni <ietf-dane () dukhovni ! org>
Date:       2023-10-04 15:01:23
Message-ID: ZR1-Q5SCL4m35tDB () straasha ! imrryr ! org
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On Wed, Oct 04, 2023 at 04:46:42PM +0200, Martin Wismer wrote:

> we could get answer from all of the dhl.com NS RR TXT.  It's a big
> Answer, biger than 2200 Byte. May be they have rate-limit's on it.

That's not the issue.  The OP also reported that answers arrive when no
EDNS options are used (no NSID and no COOKIEs), but EDNS option
intolerance is EDNS-noncompliance.  Unsupported options must be simply
ignored, rather than cause the query to be dropped.

-- 
    Viktor.
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