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Re: dns-0x20.txt

Mark Andrews <Mark_Andrews@isc.org> Thu, 28 February 2008 10:56 UTC

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To: Jim Reid <jim@rfc1035.com>
Cc: Paul Vixie <Paul_Vixie@isc.org>, namedroppers@ops.ietf.org
From: Mark Andrews <Mark_Andrews@isc.org>
Subject: Re: dns-0x20.txt
In-reply-to: Your message of "Thu, 28 Feb 2008 10:21:27 -0000." <64596508-A1BE-4CDD-A0CE-3D2E434442BF@rfc1035.com>
Date: Thu, 28 Feb 2008 21:52:34 +1100
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> On Feb 28, 2008, at 01:26, Mark Andrews wrote:
> 
> > 	If you have a DNS server, however old, that drops EDNS
> > 	queries then you should ship a fix.  The server is BROKEN
> > 	and the rest of us are feed up with working around broken
> > 	implementations.
> 
> Mark, I agree that DNS stuff which doesn't support EDNS is broken.  
> However there's no standards-track RFC that says "thou MUST implement  
> ENDS" or "those that don't are broken". 

	I said "respond" not "talks EDNS".  RFC 1034 has FORMERR
	so the server can tell the client that it doesn't understand
	the request.  Servers that don't emit FORMERR when they
	don't understand the request are *broken*.

> This was why Lawrence and I  
> came up with draft-ietf-enum-edns0-00.txt. The prime motivation for  
> that was to ensure handset manufacturers and the like put EDNS  
> support in their ENUM-aware resolvers. Since there's currently no  
> other IETF document that says they should do this, they won't add  
> this to the handset firmware or whatever.
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews@isc.org

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