Re: [bitfolk] IPv4 reverse DNS

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Author: Andy Bennett
Date:  
To: users
Subject: Re: [bitfolk] IPv4 reverse DNS
Hello again,

> ...but there also seems to be an upstream problem where DNS
> isn't aware of the NS servers for your PTR record.


...of course, I hit send to early.


Let's look in the parent domain, which might be a different zone:

-----
$ nslookup
> set query=ns
> 84.119.85.in-addr.arpa

Server:         217.169.20.21
Address:        217.169.20.21#53


Non-authoritative answer:
84.119.85.in-addr.arpa nameserver = a.authns.bitfolk.co.uk.
84.119.85.in-addr.arpa nameserver = b.authns.bitfolk.com.
84.119.85.in-addr.arpa nameserver = c.authns.bitfolk.com.

Authoritative answers can be found from:
>

-----

So far so good. Let's ask a.authns.bitfolk.co.uk:


-----
> server a.authns.bitfolk.co.uk.

Default server: a.authns.bitfolk.co.uk.
Address: 85.119.80.222#53
Default server: a.authns.bitfolk.co.uk.
Address: 2001:ba8:1f1:f085::53#53
> 35.84.119.85.in-addr.arpa

Server:         a.authns.bitfolk.co.uk.
Address:        85.119.80.222#53


35.84.119.85.in-addr.arpa       canonical name = 
35.35-32.84.119.85.in-addr.arpa.
-----


-----
> 35.35-32.84.119.85.in-addr.arpa.

Server:         a.authns.bitfolk.co.uk.
Address:        85.119.80.222#53


Non-authoritative answer:
*** Can't find 35.35-32.84.119.85.in-addr.arpa.: No answer

Authoritative answers can be found from:
35-32.84.119.85.in-addr.arpa    nameserver = ns1.keiths-place.co.uk.
35-32.84.119.85.in-addr.arpa    nameserver = ns2.keiths-place.co.uk.
35-32.84.119.85.in-addr.arpa    nameserver = ns3.keiths-place.co.uk.
ns1.keiths-place.co.uk  internet address = 85.119.84.35
ns1.keiths-place.co.uk  has AAAA address 2001:ba8:1f1:f309::2
ns2.keiths-place.co.uk  internet address = 85.119.82.237
ns2.keiths-place.co.uk  has AAAA address 2001:ba8:1f1:f29d::2
ns3.keiths-place.co.uk  internet address = 85.119.82.237
ns3.keiths-place.co.uk  has AAAA address 2001:ba8:1f1:f29d::2
-----


Now it's getting interesting.
We're back to ns1.keiths-place.co.uk.

-----
> server ns1.keiths-place.co.uk.

Default server: ns1.keiths-place.co.uk.
Address: 85.119.84.35#53
Default server: ns1.keiths-place.co.uk.
Address: 2001:ba8:1f1:f309::2#53
> 35-32.84.119.85.in-addr.arpa

Server:         ns1.keiths-place.co.uk.
Address:        85.119.84.35#53


** server can't find 35-32.84.119.85.in-addr.arpa: REFUSED
-----

So it looks like you need to serve answers for
35.35-32.84.119.85.in-addr.arpa rather from the zone
35-32.84.119.85.in-addr.arpa rather than


A change to your zone file and named config should sort it out.

Something like (untested):

zone "35-32.84.119.85.in-addr.arpa" {

rather than

zone "35.84.119.85.in-addr.arpa" {

and

35.35-32.84.119.85.in-addr.arpa.    IN    SOA    ns2.keiths-place.co.uk. 
keith.keiths-place.co.uk.


rather than

35.84.119.85.in-addr.arpa.    IN    SOA    ns2.keiths-place.co.uk. 
keith.keiths-place.co.uk.





Best wishes,
@ndy

--
andyjpb@???
http://www.ashurst.eu.org/
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