Looking for way to mark a zone no-xfer for a sub-domain .

[Joseph S D Yao]

On Fri, Sep 01, 2000 at 02:46:22PM +0000, Eric A. Hall wrote:
> >     Georgi> Is using of rfc1918 addresses together with
> >     Georgi> real IP in zone file prohibited?
> > 
> > No. Why would it be? RFC1918 addresses are valid IP addresses.
> 
> The obvious exception here is NS records for delegation hints. You really
> should not use 1918 addresses to point to authoritative servers for a
> zone, since external resolvers will never go to the right server.
> 
> MX records can also have problems in those cases where the MX list
> includes 1918 addresses which are also valid mail systems on the remote
> network. If a remote mailer tries sending to a 1918 address and delivery
> to a local server succeeds (due to overlapping addresses), the mail may
> not get delivered if the mailer decides there's a configuration error.

These are perfectly valid.  When used within the private internet.
Obviously, it is their use on the public Internet that is a problem.

Go with split DNS, already.  Jim Reid's first answer was definitive.

-- 
Joe Yao				jsdy at cospo.osis.gov - Joseph S. D. Yao
COSPO/OSIS Computer Support					EMT-B
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