Non-Octet Boundary Delegation (RFC 4183)

[Simon Hobson]

A: Because it messes up the order in which people normally read text.
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Stas wrote:
>Thank you Simon, thank you Andris.
>
>Andris, problem is that in that case I will need to use "nslookup
>68.27.133.10.ptr-pa.lan.orga.ru instead of "nslookup 10.133.27.68" to
>get DNS record.

You **ALWAYS** lookup by the normal IP - eg dig -x 10.133.27.68
That results in a lookup of 68.27.133.10.in-addr.arpa.

The trick is that instead of that being a PTR to some FQDN, it is a 
pointer to 68.27.133.10.ptr-pa.lan.orga.ru.
Ie, in the 27.133.10.in-addr.arpa zone there'll be a record
68 PTR 68.27.133.10.ptr-pa.lan.orga.ru.

Then in the ptr-pa.lan.orga.ru zone, you have an entry dynamically 
created by DHCP which is "68.27.133.10. PTR <some fqdn>".

It's some time since I played with this, but I recall it "just works" 
- looking again at RFC 4183, I certainly didn't do it that way. But 
I'm happy to be corrected if I'm wrong.

-- 
Simon Hobson

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