Archived from groups: microsoft.public.win2000.dns (
More info?)
Kevin gave you the formal RFC 2317 way to delegate the IP space (spot on!).
Really you can also do this by creating a subdomain/subzone of your name
space and delegate that to the "customer" and build the files out in the
same format Kevin listed. Sometimes I think the RFC confuses a lot of folks
about what is happening because people don't understand that the "192-223"
listed in Kevin's example is simply a subdomain/subzone. For instance, if
your domain name was "example.com" you could do:
; delegate customer.example.com to your customers name servers
customer.example.com. NS ns1.customer.com
customer.example.com. NS ns2.customer.com
; in your reverse file for the IP address block simple create the CNAME
entries like
192 CNAME 192-168-10-192.customer.example.com
193 CNAME 192-168-10-193.customer.example.com
....
; your customer simply builds out on their name server a zone file for
customer.example.com.
; in the file they put:
192-168-10-192 PTR something.foo.bar.
192-168-10-193 PTR another.foo.bar.
....
Not the best example in the world I suppose but it really is to show that to
do sub /24 delegation it is really just a subdomain/subzone delegation using
CNAME entries to point to the subdomain/subzone (which happens to be hosted
on a different name server).
Great thing about this method is that you are still in control of the
reverse entries. If the relationship with the customer goes away simple
remove the CNAME entries and the delegation of the subdomain/subzone and you
can build regular PTR entries.
Hope that helps. Either that or I just confused a lot of folks ;-)
Ed Horley - MVP Windows Server - Networking
"Kevin D. Goodknecht Sr. [MVP]" <admin@nospam.WFTX.US> wrote in message
news:eNZElQKgEHA.2524@TK2MSFTNGP09.phx.gbl...
> In news:061101c4809d$53516300$3501280a@phx.gbl,
> David Enns <anonymous@discussions.microsoft.com> wrote their comments
> Then Kevin replied below:
> > We are trying to delegate to one of our customers a block
> > of IP addresses that we currently have reverse DNS
> > pointing to us. I have tried several times with the wizard
> > to delegate the IP block but with no success. Here is what
> > I'm trying to do:
>
>
>
> > delegate 192-223.10.168.192.in-addr.arpa
>
> Let's use this example, in the 10.168.192.in-addr.arpa. zone create a
> delegation named "192-223" and point that delegation to the DNS your
> delegating to.
> The rest is done with Cnames on your part.
>
> Create this Cname record in the 10.168.192.in-addr.arpa. zone:
> 192 CNAME 192.192-223.10.168.192.in-addr.arpa.
> 193 CNAME 193.192-223.10.168.192.in-addr.arpa
> 194 CNAME 194.192-223.10.168.192.in-addr.arpa.
> So on and so on to:
> 223 CNAME 223.192-223.10.168.192.in-addr.arpa.
>
> Now 192.10.168.192.in-addr.arpa points to the Cname
> 192.192-223.10.168.192.in-addr.arpa. and so on.
>
> Then have your customer create a reverse lookup zone named
> 192-223.10.168.192.in-addr.arpa with a 192 PTR record in it and its name.
>
>
>
>
> --
> Best regards,
> Kevin D4 Dad Goodknecht Sr. [MVP]
> Hope This Helps
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