Bind 9.8.0 intermittent problem with non-recursive responses

[eugene tsuno]

We saw the problem that is described in 9.8.0-P2 in a few hours.  I
understand the resolution was a bug fix.
What made it intermittent?  I am trying to recreate it on a different
server and I can't.  Once it happened, I could identify it quite
quickly, but I try the same test and it does not fail.

-- 
eugene tsuno
NOAA Boulder/NOC
325 broadway, boulder,co 80305
303-497-6392

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Re: about the dig

[eugene tsuno]

Feng:

I think G.W is pointing out that in the absence of resolv.conf, dig uses
the localhost to connect
to the bind server.  Just tcpdump the loopback interface, and you will
see it.

So the reason resolution works is because you are running bind on that
server.  It would not work
on any client which isn't running bind.

We generally put the entry in so we know where our DNS requests are
going, the loopback or
a real interface.  In doesn't have to be that way, you don't have to use
the bind server on
the box itself.


On 7/19/11 3:54 AM, Feng He wrote:
> On Tue, Jul 19, 2011 at 2:47 PM, G.W. Haywood  wrote:
>
>> man resolv.conf
>>
>> " If  this file doesn't exist the only name server to be queried will be on 
>> the local machine; the domain name is determined from the
>>   hostname and the domain search path is constructed from the domain 
>> name."
>>
> Nothing around the resolv.conf, I was talking about dig.
> Thanks.
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-- 
eugene tsuno
NOAA Boulder/NOC
325 broadway, boulder,co 80305
303-497-6392

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Re: Format of the IPv6 reversed zone

[eugene tsuno]

There is a little perl ipv6 calc that I use ipv6calc so I don't mis-typo it.

 ipv6calc --addr_to_ip6arpa 2001:1930:c00::2
No input type specified, try autodetection...found type: ipv6addr
2.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.c.0.0.3.9.1.1.0.0.2.ip6.arpa.

The web page is dead, but the ftp download works.
http://mirrors.bieringer.de/www.deepspace6.net/projects/ipv6calc.html#id2860191

and of course one can easily run a script to spit out the reverses.

On 7/28/11 12:31 PM, Khuu, Linh Contractor wrote:
> Thanks Jay and Leonard for the pointers of IPv6 format.
>
> Linh Khuu
>
>
> -Original Message-
> From: Jay Ford [mailto:jay-f...@uiowa.edu] 
> Sent: Thursday, July 28, 2011 2:22 PM
> To: Khuu, Linh Contractor
> Cc: 'bind-users@lists.isc.org'
> Subject: Re: Format of the IPv6 reversed zone
>
> On Thu, 28 Jul 2011, Khuu, Linh   Contractor wrote:
>> I'm new to IPv6 configuring in BIND. I need help. The forward zone is
>> simple enough with  record, but the reversed zone is a bit confusing to
>> me.
>>
>> For example, I want to add a hostname of www.example.com to
>> 2001:1930:c00::2. This IPv6 address is /48.
>>
>> How can I add this IPv6 address in a reversed format?
>>
>> $ORIGIN 0.0.0.0.0.0.0.c.0.3.9.1.1.0.0.2.ip6.arpa. IN SOA ..
>>
>> @ NS dnstemp1.example.com
>>
>> What should I put for the PTR???
>>
>> Is the reversed for IPv6 in the ip6.arpa file or IP6.int file???
> It's in ip6.arpa.  The whole name for 2001:1930:c00::2 should be:
> 2.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.C.0.0.3.9.1.1.0.0.2.IP6.ARPA
>
> In your origin above you lost a "0" right of the "c".  The ":c00:" chunk is
> actually ":0c00:", so the correct origin is:
> 0.0.0.0.0.0.c.0.0.3.9.1.1.0.0.2.ip6.arpa
> in which the PTR RR would be:
> 2.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0   IN  PTR www.example.com
>
> 
> Jay Ford, Network Engineering Group, Information Technology Services
> University of Iowa, Iowa City, IA 52242
> email: jay-f...@uiowa.edu, phone: 319-335-, fax: 319-335-2951
> _______
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-- 
eugene tsuno
NOAA Boulder/NOC
325 broadway, boulder,co 80305
303-497-6392

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