Re: OT: need SBCIS (7132) contact with DNS clue

["Martin J. Levy" <mahtin () mahtin com>]

Eddy,

If you have an xDSL line with static IP's on a /27, then PBI/SBC will setup the DNS as follows.  In this example W is 
the base IP of the network (ie: 0,8,16,24,32,40,48, etc.) and (W+n) should just be a number and not have parentheses or 
a plus!

PCI/SBC will add the following to their zone files...

        W.X.Y.Z.in-addr.arpa.           IN NS   <your-nameservers>
        W.X.Y.Z.in-addr.arpa.           IN NS   <your-nameservers>
        W.X.Y.Z.in-addr.arpa.           IN NS   <your-nameservers>

In my case they did NOT list PBI/SBC as a "NS" for that specific zone, hence it always comes over to my boxes.

Then PBI/SBC will add this in their zone files...

        (W+0).X.Y.Z.in-addr.arpa.       IN CNAME (W+0).W.X.Y.Z.in-addr.arpa.
        (W+1).X.Y.Z.in-addr.arpa.       IN CNAME (W+1).W.X.Y.Z.in-addr.arpa.
        (W+2).X.Y.Z.in-addr.arpa.       IN CNAME (W+2).W.X.Y.Z.in-addr.arpa.
        (W+3).X.Y.Z.in-addr.arpa.       IN CNAME (W+3).W.X.Y.Z.in-addr.arpa.
        (W+4).X.Y.Z.in-addr.arpa.       IN CNAME (W+4).W.X.Y.Z.in-addr.arpa.
        (W+5).X.Y.Z.in-addr.arpa.       IN CNAME (W+5).W.X.Y.Z.in-addr.arpa.
        (W+6).X.Y.Z.in-addr.arpa.       IN CNAME (W+6).W.X.Y.Z.in-addr.arpa.

PBI/SBC did not do the W+7 entry for me but they did do the W+0 entry. :-)

That all said, you just need to add one zone "W.X.Y.Z.in-addr.arpa" on your side.

Why is this confusing?  Because if you got the same email as I did... they didn't even come close to explaining it this 
way and hence why your worried about the recurse on the NS's.

Contact email address I have in my files for PBI/SBC DNS are...

        "HARPER, LACONTRIA (SBIS)" <lh6712 () sbc com> 
        DESC Central <DESCCentral () sbis sbc com> 

Note that I don't work for SBC, I just use an xDSL line at home.

Martin

----------
At 10:44 PM 3/21/2003 +0000, E.B. Dreger wrote:

> Greetings all,
>
>
> Anyone have an SBCIS (AS7132) contact with DNS clue?  I'm being
> told it's "company policy" that they list their nameservers as
> authoritative for reverse DNS on space assigned from their
> netblocks.  IOW, they "delegate" by creating NS RRs that point to
> the correct NSes _and_ NS RRs pointing to their own.
>
> It gets better.  Like all good "authoritative" NSes, their NSes
> disallow recursive processing.  Is it truly company policy to
> screw up reverse DNS for downstreams who run their own?
>
> Wanted: AS7132 contact who understands the concept of lame
> servers, why they are bad, and is willing and able to help do
> something about it.
>
>
> Eddy
> --
> Brotsman & Dreger, Inc. - EverQuick Internet Division
> Bandwidth, consulting, e-commerce, hosting, and network building
> Phone: +1 (785) 865-5885 Lawrence and [inter]national
> Phone: +1 (316) 794-8922 Wichita
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Date: Mon, 21 May 2001 11:23:58 +0000 (GMT)
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