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<p class="MsoNormal"><span style="color:#1F497D">Hello together,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">can anyone reproduce this problem or should I open a ticket on github?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks and best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Markus<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="mso-fareast-language:DE">Von:</span></b><span style="mso-fareast-language:DE"> Markus Ehrlicher
<br>
<b>Gesendet:</b> Dienstag, 1. September 2020 11:53<br>
<b>An:</b> pdns-users@mailman.powerdns.com<br>
<b>Betreff:</b> questions of understanding pdns-recursor with hosts-file<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hello together,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’am a little confused about the „export-etc-hosts“-switch. I use latest pdns-recursor in version 4.3.3 on Ubuntu 20.04.<o:p></o:p></p>
<p class="MsoNormal">Because of problems with firewall, NAT and external IPs, we have to redirect some (not all) DNS-Entries to internal IPs instead of public available IPs. For this purpose I installed this extra server, to insert the needed entries in the
hosts-file and activated „export-etc-hosts“ in pdns-recursor.conf. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Now my problem: if the root domain (in my example benchmaxx.de) is included in this hosts-file, the recursor seems to feel authoritative for the whole domain and trys to answers all other requests for subdomains from benchmaxx.de (in my
example test.benchmaxx.de) with NXDOMAIN.<o:p></o:p></p>
<p class="MsoNormal">Here are the logs for this behavior:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:37:51 dmz-ns1 pdns_recursor[1454639]: 3 [6/1] question for 'test.benchmaxx.de|A' from 10.10.2.26:45074<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:37:51 dmz-ns1 pdns_recursor[1454639]: test.benchmaxx.de: Wants DNSSEC processing, auth data in query for A<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:37:51 dmz-ns1 pdns_recursor[1454639]: test.benchmaxx.de: Looking for CNAME cache hit of 'test.benchmaxx.de|CNAME'<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:37:51 dmz-ns1 pdns_recursor[1454639]: test.benchmaxx.de: Looking for DNAME cache hit of 'test.benchmaxx.de|DNAME' or its ancestors<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:37:51 dmz-ns1 pdns_recursor[1454639]: test.benchmaxx.de: No CNAME or DNAME cache hit of 'test.benchmaxx.de' found<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:37:51 dmz-ns1 pdns_recursor[1454639]: test.benchmaxx.de: No cache hit for 'test.benchmaxx.de|A', trying to find an appropriate NS record<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:37:51 dmz-ns1 pdns_recursor[1454639]: test.benchmaxx.de: initial validation status for test.benchmaxx.de is Indeterminate<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:37:51 dmz-ns1 pdns_recursor[1454639]: test.benchmaxx.de: Cache consultations done, have 1 NS to contact<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:37:51 dmz-ns1 pdns_recursor[1454639]: test.benchmaxx.de: Domain is out-of-band<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:37:51 dmz-ns1 pdns_recursor[1454639]: test.benchmaxx.de: auth storage has data, zone='benchmaxx.de'<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:37:51 dmz-ns1 pdns_recursor[1454639]: test.benchmaxx.de: accept answer 'benchmaxx.de|SOA|localhost. root. 1 604800 86400 2419200 604800' from 'benchmaxx.de' nameservers?
ttl=7200, place=2 YES! - This answer was retrieved from the local auth store.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:37:51 dmz-ns1 pdns_recursor[1454639]: test.benchmaxx.de: determining status after receiving this packet<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:37:51 dmz-ns1 pdns_recursor[1454639]: test.benchmaxx.de: got negative caching indication for name 'test.benchmaxx.de' (accept=1), newtarget='(empty)'<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:37:51 dmz-ns1 pdns_recursor[1454639]: test.benchmaxx.de: status=NXDOMAIN, we are done (have negative SOA)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:37:51 dmz-ns1 pdns_recursor[1454639]: test.benchmaxx.de: failed (res=3)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:37:51 dmz-ns1 pdns_recursor[1454639]: 3 [6/1] answer to question 'test.benchmaxx.de|A': 0 answers, 0 additional, took 0 packets, 0 netw ms, 0 tot ms, 0 throttled, 0 timeouts,
0 tcp connections, rcode=3<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If I comment out benchmaxx.de in the hosts-file, all is fine and the request for test.benchmaxx.de is answered correctly:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: 3 [1/1] question for 'test.benchmaxx.de|A' from 10.10.2.26:49295<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: Wants DNSSEC processing, auth data in query for A<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: Looking for CNAME cache hit of 'test.benchmaxx.de|CNAME'<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: Looking for DNAME cache hit of 'test.benchmaxx.de|DNAME' or its ancestors<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: No CNAME or DNAME cache hit of 'test.benchmaxx.de' found<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: No cache hit for 'test.benchmaxx.de|A', trying to find an appropriate NS record<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: initial validation status for test.benchmaxx.de is Indeterminate<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: Cache consultations done, have 1 NS to contact<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: Domain has hardcoded nameservers<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de.: Nameservers: +217.119.211.10:53(2.11ms), +217.119.214.10:53(2.93ms)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: Resolved '.' NS (empty) to: 217.119.211.10, 217.119.214.10<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: Trying IP 217.119.211.10:53, asking 'test.benchmaxx.de|A'<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: Got 2 answers from (empty) (217.119.211.10), rcode=0 (No Error), aa=0, in 13ms<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: accept answer 'test.benchmaxx.de|A|2.2.2.2' from '.' nameservers? ttl=3600, place=1 YES! - This answer was received
from a server we forward to.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: OPT answer '.' from '.' nameservers<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: : got initial zone status Indeterminate for record test.benchmaxx.de|A<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: determining status after receiving this packet<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: answer is in: resolved to '2.2.2.2|A'<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: status=got results, this level of recursion done<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: validation status is Indeterminate<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: 3 [1/1] answer to question 'test.benchmaxx.de|A': 1 answers, 0 additional, took 1 packets, 13.069 netw ms, 13.317 tot ms, 0 throttled,
0 timeouts, 0 tcp connections, rcode=0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: 3 [2/1] question for 'test.benchmaxx.de|AAAA' from 10.10.2.26:33182<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: Wants DNSSEC processing, auth data in query for AAAA<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: Looking for CNAME cache hit of 'test.benchmaxx.de|CNAME'<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: Looking for DNAME cache hit of 'test.benchmaxx.de|DNAME' or its ancestors<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: No CNAME or DNAME cache hit of 'test.benchmaxx.de' found<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: No cache hit for 'test.benchmaxx.de|AAAA', trying to find an appropriate NS record<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: initial validation status for test.benchmaxx.de is Indeterminate<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: Cache consultations done, have 1 NS to contact<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: Domain has hardcoded nameservers<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de.: Nameservers: +217.119.214.10:53(2.93ms), +217.119.211.10:53(13.01ms)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: Resolved '.' NS (empty) to: 217.119.214.10, 217.119.211.10<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: Trying IP 217.119.214.10:53, asking 'test.benchmaxx.de|AAAA'<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: Got 2 answers from (empty) (217.119.214.10), rcode=0 (No Error), aa=0, in 11ms<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: accept answer 'benchmaxx.de|SOA|ns3.komsa.net. root.ns3.komsa.net. 2020090101 10800 3600 604800 3600' from '.' nameservers?
ttl=3600, place=2 YES! - This answer was received from a server we forward to.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: OPT answer '.' from '.' nameservers<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: determining status after receiving this packet<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: got negative caching indication for 'test.benchmaxx.de|AAAA'<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: test.benchmaxx.de: status=noerror, other types may exist, but we are done (have negative SOA)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New"">Sep 01 11:38:10 dmz-ns1 pdns_recursor[1454675]: 3 [2/1] answer to question 'test.benchmaxx.de|AAAA': 0 answers, 0 additional, took 1 packets, 11.155 netw ms, 11.244 tot ms, 0 throttled,
0 timeouts, 0 tcp connections, rcode=0<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">So my question is: is this behavior normal and intended? <o:p>
</o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks and best regards,<o:p></o:p></p>
<p class="MsoNormal">Markus<o:p></o:p></p>
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