A host which auto-registers in MS DNS, creates an A in foo.alaska.gov
and PTR in whatever.10.in-addr.arpa. MS DNS is happy to publish those.
But the DNS system running on BIND also has a whatever.10.in-addr.arpa
zone.
So if I want to find the PTR for 13.12.11.10.in-addr.arpa, I must query
both DNS systems in turn. If I get NXDOMAIN from both, then I can say
the PTR doesn't exist.
On each system, I'd like to be able to take the 10.in-addr.arpa data
from the other, compute the differences, and incorporate them locally.
Then I'll be able to query either system, and accept an NXDOMAIN with
confidence.
And since writing my earlier note, I have re-located the code I think I
stumbled across earlier
Tony Finch's "nsdiff"
https://dotat.at/prog/nsdiff/
--
Do things because you should, not just because you can.
John Thurston 907-465-8591
john.thurs...@alaska.gov
Department of Administration
State of Alaska
On 9/15/2023 2:21 PM, Greg Choules wrote:
Hi John.
Can you tell me a bit more please?
- What zones exist in both BIND and MS DNS for something.10.in-addr.arpa?
- Where are hosts auto registering to? I'd guess MS, but it would be
good to confirm.
- What does fragmentation look like? A few real examples would be
useful. I'm trying to understand just what is the problem.
- How much of 10 do you use?
- What do you mean by "...can be published from two different DNS
services."? Could you expand on that please?
- Is there any zone transfer between BIND and MS DNS?
Thanks, Greg
On Fri, 15 Sept 2023 at 21:00, John Thurston
<john.thurs...@alaska.gov> wrote:
This question involves making our BIND system work with
Microsoft's DNS software. If this makes it off-topic, let me know
and I'll be quiet about it.
We use ISC BIND to hold and host most of our zone data.
Internally, we have delegated some zones, and they are held in
Microsoft DNS. These zones are used for MS Active Directory
'Domains', and accept auto-registration of DNS records from
authorized hosts. Because we are using 10-dot addresses
internally, the auto-registration by hosts causes fragmentation of
the 10.in-addr.arpa zone data.
I recall someone once offered a bit of code to mash this zone data
back together, so the same information can be published from two
different DNS services. I've hunted through this list's archive
and have not found the reference. Before I go roll my own, can
anyone point me at an existing solution?
--
--
Do things because you should, not just because you can.
John Thurston 907-465-8591
john.thurs...@alaska.gov
Department of Administration
State of Alaska
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