rfc1918 ns records coming from internet are queried?

[David Sparks]

sthaug at nethelp.no wrote:
>>> A border router knows what is "inside" and "outside" your network, while
>>> a DNS server does not. Important difference.
>> You're missing the point.  This is not about inside and outside networks, it
>> is about rfc1918 responses from internet queries.
> 
> I'm afraid I have seen too many organizations using a mix of public and
> RFC1918 IP addresses on the "inside". Thus I don't believe that you can
> differentiate based on RFC1918 addresses or not on a general basis.

This is incorrect, you can always differentiate based on rfc1918 addresses.
When a 3rd party gives you a rfc1918 address it is invalid.

ds