Non-Octet Boundary Delegation (RFC 4183)
ginermail at gmail.com
Thu Sep 22 11:56:50 UTC 2011
On Thu, Sep 22, 2011 at 10:58 AM, Simon Hobson <dhcp1 at thehobsons.co.uk> wrote:
> A: Because it messes up the order in which people normally read text.
> Q: Why is top-posting such a bad thing?
> A: Top-posting.
> Q: What is the most annoying thing in e-mail?
> Stas wrote:
>> Thank you Simon, thank you Andris.
>> Andris, problem is that in that case I will need to use "nslookup
>> 188.8.131.52.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 184.108.40.206.in-addr.arpa.
> The trick is that instead of that being a PTR to some FQDN, it is a pointer
> to 220.127.116.11.ptr-pa.lan.orga.ru.
> Ie, in the 27.133.10.in-addr.arpa zone there'll be a record
> 68 PTR 18.104.22.168.ptr-pa.lan.orga.ru.
> Then in the ptr-pa.lan.orga.ru zone, you have an entry dynamically created
> by DHCP which is "22.214.171.124. 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
> Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
> author Gladys Hobson. Novels - poetry - short stories - ideal as
> Christmas stocking fillers. Some available as e-books.
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I went though the RFC 2317 and tried to configure bind and dhcpd in
some ways but I didn't reach appropriate result.
I need to have reverse records for 10.133.24.0/21 (from 10.133.24.1 to
10.133.31.254) been resolved by our dns server but other networks (all
of 10.0.0.0/8 except of 10.133.24.0/21) need to be resolved by
upstream DNS server and I'm not sure how it's possible to configure
BIND + DHCPD for it.
In case I use configuration suggested by Andris it doesn't resolve
names by IP addresses.
** server can't find 126.96.36.199.in-addr.arpa.: NXDOMAIN
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