> >if someone wants to use
> >private address space for DNS work, they should have to run an extra knob.
> 
> Why?
> 
> Why make it hard to do something right?

because the default is for ambiguous addresses to leak into places where
they make no sense.  similarly, rfc 1918 source addressed ip packets should
not be able to escape their routing domain by default.

> Why is this a DNS issue?  Why use the DNS to make a statement on the use of
> RFC 1918 space?

it's everybody's problem and every protocol's and service's problem.  in
dns, it looks like A RR's and so that's where i'm proposing to filter it.

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