Maintained by: NLnet Labs

query ip address

Joe Williams
Wed Sep 13 22:52:34 CEST 2017


Thanks for finding that Tom!

On Wed, Sep 13, 2017 at 1:49 PM, Tom Samplonius <tom at samplonius.org> wrote:

> dnscache is a pretty weird.  From the webpage at http://cr.yp.to/djbdns/
> dnscache.html ...
>
>
> “dnscache handles dotted-decimal domain names internally, giving (e.g.)
> the domain name 192.48.96.2 an A record of 192.48.96.2."
>
>
> So it looks like dnscache will return a the IP address back for any A
> queries for a IP address.  And it looks like it returns a basically
> infinite ttl.
>
> Why do you need this behaviour?  I used to use dnscache many years ago,
> but dropped it when powerdns-recursor became available.  I never noticed
> this “feature”, and never had anything break when it went away.
>
>
>
>
> On Sep 13, 2017, at 1:17 PM, Joe Williams <williams.joe at gmail.com> wrote:
>
> Thanks for the reply Tom, I wish I knew why as well.  Right now I am just
> trying to make my unbound config backwards compatible to not break code
> that expects an answer for an IP address.
>
> On Wed, Sep 13, 2017 at 1:05 PM, Tom Samplonius <tom at samplonius.org>
> wrote:
>
>>
>> > ;; ANSWER SECTION:
>> > 10.36.129.10.         655360  IN      A       10.36.129.10
>>
>>
>>   Looking at this answer, I’m not sure why anyone would want this
>> behaviour?
>>
>>   Is dnscache trying to dampen RFC1918 A queries by doing this?
>>
>>
>> Tom
>
>
>
>
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