[Herefordshire] I am in a real bind!!!

[Andrew Hodgson]

-----Original Message-----
From: herefordshire-bounces at mailman.lug.org.uk
[mailto:herefordshire-bounces at mailman.lug.org.uk] On Behalf Of John Hedges
Sent: 21 June 2005 09:58

>On Tue, Jun 21, 2005 at 08:58:10AM +0100, Andrew Hodgson wrote:
>> Hi,
>> 
>> I am wondering whether any of you on the list can help me with a bit of a
>> DNS quandary I am in.
>> 
>> I am going on broadband tomorrow and my ISP has given me an IP block
>> 81.2.105.208/28.  I have to host PTR records on my DNS server using the
> subnetted style 208-223.105.2.81.in-addr.arpa. - this is fine.  

[...]

>Does this help you any - especially the last part?

>    http://www.sm5sxl.net/~mats/text/internet/dnsbind/ch09_05.htm

It just confirms really what I already knew about the messy delegation
involved.  As I said the ISP has taken care of this on the public side, so
either I copy this on the private DNS server (and risk not being able to
resolve PTR records for other IP addresses in the larger subnet), create a
single zone for each IP in the subnet or use the same zone as the public DNS
server, populate it with different records and let the private server find
it from the root records - when it comes to looking up the cname, the
private server will already have the relevant zone, so _should_ use it as
opposed to looking up the zone from the DNS referrer.  I am betting that the
last version will work, unless I am proved wrong either by someone telling
me or when it falls over tomorrow!

Thanks.
Andrew.


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