Complain to the administrators of the zone. They have not properly delegated
it. We see this often with load balancers.
The zone a.b.example has been delegated but the answer is as if it is from
b.example.
--
Mark Andrews
> On 6 Jan 2021, at 21:02, 同屋 <39223...@qq.com> wrote:
>
>
> The version of bind is BIND 9.10.5-P3 id:7d5676f
>
> One day, I found that the size of named.run is increasing very quickly. And a
> lot of "invalid response" entries were spotted in the log. Details is as
> follows (I replace the sensitive info with {xxxx},{AAA} etc.)
>
> DNS format error from {IP}#53 resolving
> {XXXX}.bf.bf.node.epc.mnc{AAA}.mcc{BBB}.3gppnetwork.org/AAAA for client
> 169.254.4.50#51099: Name epc.mnc{AAA}.mcc{BBB}.3gppnetwork.org (SOA) not
> subdomain of zone node.epc.mnc{AAA}.mcc{BBB}.3gppnetwork.org -- invalid
> response
>
> The response related to the above log is as follows:
>
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50664 ;; flags: qr aa rd
> ra; QUESTION: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1 ;; OPT PSEUDOSECTION:
> ; EDNS: version: 0, flags: do; udp: 4096 ;; QUESTION SECTION:
> ;{XXXX}.bf.bf.node.epc.mnc{AAA}.mcc{BBB}.3gppnetwork.org. IN AAAA
>
> ;; AUTHORITY SECTION: ;epc.mnc{AAA}.mcc{BBB}.3gppnetwork.org. 86400 IN SOA
> .mnc{AAA}.mcc{BBB}.gprs. dns-admin. ( ; 2020122704 ; serial ; 10800 ; refresh
> (3 hours) ; 3600 ; retry (1 hour) ; 604800 ; expire (1 week) ; 86400 ;
> minimum (1 day) ; )
>
> ============================================
>
> Normally, the FQDN should be cached as a NXRRSET record as follows:
>
> {XXXX}.bf.bf.node.epc.mnc{AAA}.mcc{BBB}.3gppnetwork.org. 8412 -AAAA ;-$NXRRSET
>
> But when the issue happens, it cannot be cached, I guess it's related to the
> "invalid response" log.
>
> From the error log, it mentions "zone
> node.epc.mnc{AAA}.mcc{BBB}.3gppnetwork.org", but I'm wondering where the zone
> "node.epc.mnc{AAA}.mcc{BBB}.3gppnetwork.org" comes from? I cannot found the
> related SOA record in the dump file.
>
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