Hi. Although it is technically possible to do reverses on non-octet boundaries (for example, see https://www.ietf.org/rfc/rfc2317.txt) it is a complete pita, in my experience. Personally I would not head down that path. Stick to /8, /16 or /24.
Cheers, Greg On Sat, 16 Sept 2023 at 09:20, G.W. Haywood via bind-users < bind-users@lists.isc.org> wrote: > Hi there, > > On Sat, 16 Sep 2023, John Thurston wrote: > > > 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. > > Is there a reason not to split the /8 into two /9s or something like that? > Then you'd have no fragmentation (at least not for this reason) and you'd > always know who to ask. > > > And since writing my earlier note, I have re-located the code I think I > > stumbled across earlier > > > > Tony Finch's "nsdiff" > > Does that mean problem replaced, if not solved? > > -- > > 73, > Ged. > -- > Visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe > from this list > > ISC funds the development of this software with paid support > subscriptions. Contact us at https://www.isc.org/contact/ for more > information. > > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users >
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