On Sat, Dec 15, 2018 at 04:37:06PM +0100, Dominik DL6ER wrote:
> Dear all,
>
> I observe that dnsmasq does not log the result of a query that was
> replied to with NXDOMAIN when the response does not include an SOA
> record. To my understanding, this is because, without an SOA record, no
> TTL is available and the logging event when adding a domain to the
> internal cache in not triggered.
>
> Steps to reproduce:
>
>1. Configure dnsmasq to use the server 9.9.9.9
>2. Query www.isitblocked.org
>3. Observe that the following is logged (extra logging format):
>
> Dec 15 16:11:32 dnsmasq[14851]: 1853 192.168.3.3/58098 query[A]
> www.isitblocked.org from 192.168.3.3
> Dec 15 16:11:32 dnsmasq[14851]: 1853 192.168.3.3/58098 forwarded
> www.isitblocked.org to 9.9.9.9
>
> As you see, the reply (NXDOMAIN) is missing although the response is
> correctly sent to the requesting client.
>
|$ host www.isitblocked.org
|www.isitblocked.org has address 74.208.236.124
|www.isitblocked.org has IPv6 address 2607:f1c0:100f:f000::2d1
|stappers@paddy:~
|$ host www.isitblocked.org 9.9.9.9
|Using domain server:
|Name: 9.9.9.9
|Address: 9.9.9.9#53
|Aliases:
|
|Host www.isitblocked.org not found: 3(NXDOMAIN)
|$ host -t soa www.isitblocked.org
|www.isitblocked.org has no SOA record
|$ host -t soa www.isitblocked.org 9.9.9.9
|Using domain server:
|Name: 9.9.9.9
|Address: 9.9.9.9#53
|Aliases:
|
|Host www.isitblocked.org not found: 3(NXDOMAIN)
|$
Groeten
Geert Stappers
--
Leven en laten leven
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