I asked Ameritech - oops SBC to add a reverse dns entry for me, instead it appears they have delegated rdns to me.
I tried http://www.dnsstuff.com/tools/ptr.ch?ip=65.42.199.3 to see what is happening. I don't quite understand the Got CNAME referral to ns2.ostgaard.com (zone 3.0.199.42.65.in-addr.arpa) should this not return (zone 3.199.42.65.in-addr.arpa) ?
What is happening here is that Ameritech/SBC is using CNAMEs to delegate on other than Class A/B/C boundaries.
Is this the correct response, or have they not quite done the delegation correctly?
They actually have done it correctly. In this case, you would set up a PTR record for 3.0.199.42.65.in-addr.arpa, which would be the reverse DNS entry for 65.42.199.3. It's a bit confusing, but works.
-Scott
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