In your previous mail you wrote:

>  > IMHO to not change the TCP requirement (which is today a MAY for
>  > deployment on clients and servers) will be very irresponsible because
>  
>  DNS + TCP was *never* a MAY.  RFC 1123 says SHOULD.  People took
>  liberties and treated it as a MAY. 

=> there is a NANOG stuff explaining these liberties.
So IMHO we have to make clear it is at least a SHOULD and not
only in implementations but also in deployments (i.e.,
a SHOULD/MUST NOT filter tcp/53 out).

Thanks

francis.dup...@fdupont.fr

PS: I want to no longer see my home ISP (Free) supporting IPv6,
DNSSEC but not DNS over TCP...

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