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    <p>Hi Patrik,</p>
    <p>I don't see any SERVFAIL querying for this AAAA record.  maybe
      your<font face="monospace, monospace"> "internal-enp1s0f3" view is
        configured to bump this domain?</font></p>
    <p><font face="monospace, monospace">Kind Regards Peter</font></p>
    <p><font face="monospace, monospace">dig aax-eu.amazon-adsystem.com
        aaaa<br>
        <br>
        ; <<>> DiG 9.10.2-P4 <<>>
        aax-eu.amazon-adsystem.com aaaa<br>
        ;; global options: +cmd<br>
        ;; Got answer:<br>
        ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id:
        32650<br>
        ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1,
        ADDITIONAL: 1<br>
        <br>
        ;; OPT PSEUDOSECTION:<br>
        ; EDNS: version: 0, flags:; udp: 4096<br>
        ;; QUESTION SECTION:<br>
        ;aax-eu.amazon-adsystem.com.    IN      AAAA<br>
        <br>
        ;; AUTHORITY SECTION:<br>
        aax-eu.amazon-adsystem.com. 60  IN      SOA    
        ns-924.amazon.com. root.amazon.com. 1532498091 3600 900 7776000
        60<br>
        <br>
        ;; Query time: 67 msec<br>
        ;; SERVER: 205.166.94.20#53(205.166.94.20)<br>
        ;; WHEN: Wed Jul 25 05:59:58 UTC 2018<br>
        ;; MSG SIZE  rcvd: 110<br>
        <br>
      </font></p>
    <br>
    <div class="moz-cite-prefix">On 25/07/2018 07:52, Patrik wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CALv3kGiKBn3QBEkoSrdPSijUwGEj45Pok3=3pC3PoFWKNVniLw@mail.gmail.com">
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      <div dir="ltr">
        <div class="gmail_default" style="font-family:"trebuchet
          ms",sans-serif;font-size:small">Hello!</div>
        <div class="gmail_default" style="font-family:"trebuchet
          ms",sans-serif;font-size:small"><br>
        </div>
        <div class="gmail_default" style="font-family:"trebuchet
          ms",sans-serif;font-size:small">How are you?</div>
        <div class="gmail_default" style="font-family:"trebuchet
          ms",sans-serif;font-size:small">I started having a
          problem with BIND9. Something must have changed, because I
          start getting SERVFAIL a lot.</div>
        <div class="gmail_default" style="font-family:"trebuchet
          ms",sans-serif;font-size:small">Looks like this:</div>
        <div class="gmail_default">
          <div class="gmail_default" style="font-size:small"><font
              face="monospace, monospace">25-Jul-2018 07:44:09.647
              client @0x7fa268223c10 192.168.78.30#56577 (<a
                href="http://aax-eu.amazon-adsystem.com"
                moz-do-not-send="true">aax-eu.amazon-adsystem.com</a>):
              view internal-enp1s0f3: query failed (SERVFAIL) for <a
                href="http://aax-eu.amazon-adsystem.com/IN/AAAA"
                moz-do-not-send="true">aax-eu.amazon-adsystem.com/IN/AAAA</a>
              at ../../../bin/named/query.c:6885</font></div>
          <div class="gmail_default" style="font-size:small"><font
              face="monospace, monospace">25-Jul-2018 07:44:09.647
              client @0x7fa2380e1ea0 192.168.81.30#41771 (<a
                href="http://aax-eu.amazon-adsystem.com"
                moz-do-not-send="true">aax-eu.amazon-adsystem.com</a>):
              view internal-enp1s0f2: query failed (SERVFAIL) for <a
                href="http://aax-eu.amazon-adsystem.com/IN/AAAA"
                moz-do-not-send="true">aax-eu.amazon-adsystem.com/IN/AAAA</a>
              at ../../../bin/named/query.c:6885</font></div>
          <div class="gmail_default" style="font-size:small"><font
              face="monospace, monospace">25-Jul-2018 07:44:09.647
              client @0x7fa2440c7ef0 2001:470:1f1b:5b3::b4a#41516 (<a
                href="http://aax-eu.amazon-adsystem.com"
                moz-do-not-send="true">aax-eu.amazon-adsystem.com</a>):
              view internal-enp1s0f3: query failed (SERVFAIL) for <a
                href="http://aax-eu.amazon-adsystem.com/IN/AAAA"
                moz-do-not-send="true">aax-eu.amazon-adsystem.com/IN/AAAA</a>
              at ../../../bin/named/query.c:6885</font></div>
          <div class="gmail_default" style="font-size:small"><font
              face="monospace, monospace">25-Jul-2018 07:44:09.647
              client @0x7fa2380e1ea0 192.168.81.30#41771 (<a
                href="http://aax-eu.amazon-adsystem.com"
                moz-do-not-send="true">aax-eu.amazon-adsystem.com</a>):
              view internal-enp1s0f2: query failed (SERVFAIL) for <a
                href="http://aax-eu.amazon-adsystem.com/IN/AAAA"
                moz-do-not-send="true">aax-eu.amazon-adsystem.com/IN/AAAA</a>
              at ../../../bin/named/query.c:6885</font></div>
          <div class="gmail_default" style="font-size:small"><font
              face="monospace, monospace">25-Jul-2018 07:44:09.648
              client @0x7fa2440c7ef0 2001:470:1f1b:5b3::b4a#41516 (<a
                href="http://aax-eu.amazon-adsystem.com"
                moz-do-not-send="true">aax-eu.amazon-adsystem.com</a>):
              view internal-enp1s0f3: query failed (SERVFAIL) for <a
                href="http://aax-eu.amazon-adsystem.com/IN/AAAA"
                moz-do-not-send="true">aax-eu.amazon-adsystem.com/IN/AAAA</a>
              at ../../../bin/named/query.c:6885</font></div>
          <div class="gmail_default" style="font-size:small"><font
              face="monospace, monospace">25-Jul-2018 07:44:09.648
              client @0x7fa2340836e0 2001:470:1f1b:5b5::b4a#50353 (<a
                href="http://aax-eu.amazon-adsystem.com"
                moz-do-not-send="true">aax-eu.amazon-adsystem.com</a>):
              view internal-enp1s0f2: query failed (SERVFAIL) for <a
                href="http://aax-eu.amazon-adsystem.com/IN/AAAA"
                moz-do-not-send="true">aax-eu.amazon-adsystem.com/IN/AAAA</a>
              at ../../../bin/named/query.c:6885</font></div>
          <div class="gmail_default" style="font-size:small"><font
              face="monospace, monospace">25-Jul-2018 07:44:09.648
              client @0x7fa2440c7ef0 2001:470:1f1b:5b5::b4a#50353 (<a
                href="http://aax-eu.amazon-adsystem.com"
                moz-do-not-send="true">aax-eu.amazon-adsystem.com</a>):
              view internal-enp1s0f2: query failed (SERVFAIL) for <a
                href="http://aax-eu.amazon-adsystem.com/IN/AAAA"
                moz-do-not-send="true">aax-eu.amazon-adsystem.com/IN/AAAA</a>
              at ../../../bin/named/query.c:6885</font></div>
          <div style="font-size:small;font-family:"trebuchet
            ms",sans-serif"><br>
          </div>
          <div style="font-size:small;font-family:"trebuchet
            ms",sans-serif">To me, it looks like, the requests try
            the AAAA ipv6 addresses but they are not in IPv6 and because
            of that it gives a SERVFAIL.</div>
          <div style="font-size:small;font-family:"trebuchet
            ms",sans-serif">Is there a way to give a priority to
            the BIND9 request before the IPv6 and first try the IPv4 and
            if there is no IPv4 result, then try IPv6. Because now, it
            gives a few SERVFAIL (I have to refresh the browser, to make
            it work to get), I guess, get the IPv4 if only works after a
            few refreshes.</div>
          <div style="font-size:small;font-family:"trebuchet
            ms",sans-serif">Even, if I do a dig on it iit shows,
            there is no AAAA:</div>
          <div>
            <div><font face="monospace, monospace">root@server:/etc/nginx/sites-enabled#
                dig <a href="http://aax-eu.amazon-adsystem.com"
                  moz-do-not-send="true">aax-eu.amazon-adsystem.com</a></font></div>
            <div><font face="monospace, monospace"><br>
              </font></div>
            <div><font face="monospace, monospace">; <<>>
                DiG 9.11.3-2-Debian <<>> <a
                  href="http://aax-eu.amazon-adsystem.com"
                  moz-do-not-send="true">aax-eu.amazon-adsystem.com</a></font></div>
            <div><font face="monospace, monospace">;; global options:
                +cmd</font></div>
            <div><font face="monospace, monospace">;; Got answer:</font></div>
            <div><font face="monospace, monospace">;;
                ->>HEADER<<- opcode: QUERY, status: NOERROR,
                id: 27021</font></div>
            <div><font face="monospace, monospace">;; flags: qr rd ra;
                QUERY: 1, ANSWER: 1, AUTHORITY: 6, ADDITIONAL: 1</font></div>
            <div><font face="monospace, monospace"><br>
              </font></div>
            <div><font face="monospace, monospace">;; OPT PSEUDOSECTION:</font></div>
            <div><font face="monospace, monospace">; EDNS: version: 0,
                flags:; udp: 4096</font></div>
            <div><font face="monospace, monospace">; COOKIE:
                e45e832118506bb5a0758eeb5b580e51c9b57c8a8d971011 (good)</font></div>
            <div><font face="monospace, monospace">;; QUESTION SECTION:</font></div>
            <div><font face="monospace, monospace">;<a
                  href="http://aax-eu.amazon-adsystem.com"
                  moz-do-not-send="true">aax-eu.amazon-adsystem.com</a>.<span style="white-space:pre">       </span>IN<span style="white-space:pre">   </span>A</font></div>
            <div><font face="monospace, monospace"><br>
              </font></div>
            <div><font face="monospace, monospace">;; ANSWER SECTION:</font></div>
            <div><font face="monospace, monospace"><a
                  href="http://aax-eu.amazon-adsystem.com"
                  moz-do-not-send="true">aax-eu.amazon-adsystem.com</a>.
                60<span style="white-space:pre">        </span>IN<span style="white-space:pre">   </span>A<span style="white-space:pre">    </span>52.94.216.48</font></div>
            <div><font face="monospace, monospace"><br>
              </font></div>
            <div><font face="monospace, monospace">;; AUTHORITY SECTION:</font></div>
            <div><font face="monospace, monospace"><a
                  href="http://aax-eu.amazon-adsystem.com"
                  moz-do-not-send="true">aax-eu.amazon-adsystem.com</a>.
                860<span style="white-space:pre">       </span>IN<span style="white-space:pre">   </span>NS<span style="white-space:pre">   </span><a
                  href="http://ns-921.amazon.com" moz-do-not-send="true">ns-921.amazon.com</a>.</font></div>
            <div><font face="monospace, monospace"><a
                  href="http://aax-eu.amazon-adsystem.com"
                  moz-do-not-send="true">aax-eu.amazon-adsystem.com</a>.
                860<span style="white-space:pre">       </span>IN<span style="white-space:pre">   </span>NS<span style="white-space:pre">   </span><a
                  href="http://ns-911.amazon.com" moz-do-not-send="true">ns-911.amazon.com</a>.</font></div>
            <div><font face="monospace, monospace"><a
                  href="http://aax-eu.amazon-adsystem.com"
                  moz-do-not-send="true">aax-eu.amazon-adsystem.com</a>.
                860<span style="white-space:pre">       </span>IN<span style="white-space:pre">   </span>NS<span style="white-space:pre">   </span><a
                  href="http://ns-932.amazon.com" moz-do-not-send="true">ns-932.amazon.com</a>.</font></div>
            <div><font face="monospace, monospace"><a
                  href="http://aax-eu.amazon-adsystem.com"
                  moz-do-not-send="true">aax-eu.amazon-adsystem.com</a>.
                860<span style="white-space:pre">       </span>IN<span style="white-space:pre">   </span>NS<span style="white-space:pre">   </span><a
                  href="http://ns-931.amazon.com" moz-do-not-send="true">ns-931.amazon.com</a>.</font></div>
            <div><font face="monospace, monospace"><a
                  href="http://aax-eu.amazon-adsystem.com"
                  moz-do-not-send="true">aax-eu.amazon-adsystem.com</a>.
                860<span style="white-space:pre">       </span>IN<span style="white-space:pre">   </span>NS<span style="white-space:pre">   </span><a
                  href="http://ns-912.amazon.com" moz-do-not-send="true">ns-912.amazon.com</a>.</font></div>
            <div><font face="monospace, monospace"><a
                  href="http://aax-eu.amazon-adsystem.com"
                  moz-do-not-send="true">aax-eu.amazon-adsystem.com</a>.
                860<span style="white-space:pre">       </span>IN<span style="white-space:pre">   </span>NS<span style="white-space:pre">   </span><a
                  href="http://ns-923.amazon.com" moz-do-not-send="true">ns-923.amazon.com</a>.</font></div>
            <div><font face="monospace, monospace"><br>
              </font></div>
            <div><font face="monospace, monospace">;; Query time: 52
                msec</font></div>
            <div><font face="monospace, monospace">;; SERVER:
                192.168.78.20#53(192.168.78.20)</font></div>
            <div><font face="monospace, monospace">;; WHEN: Wed Jul 25
                07:44:49 CEST 2018</font></div>
            <div><font face="monospace, monospace">;; MSG SIZE  rcvd:
                232</font></div>
            <div style="font-family:"trebuchet
              ms",sans-serif;font-size:small"><br>
            </div>
          </div>
        </div>
        <div class="gmail_default" style="font-family:"trebuchet
          ms",sans-serif;font-size:small">Is there any solution for
          this? It just started happening in the last week.</div>
        <div>
          <div dir="ltr" class="gmail_signature">
            <div dir="ltr">
              <div>
                <div dir="ltr">
                  <div>
                    <div dir="ltr">
                      <div dir="ltr"><font size="4"><b><u><br>
                            </u></b></font></div>
                      <div dir="ltr"><font size="4"><b><u>Patrik</u></b></font>
                        <div><font size="1"><a
                              href="https://patrikx3.com"
                              target="_blank" moz-do-not-send="true">WWW</a> | <a
                              href="https://github.com/patrikx3/"
                              target="_blank" moz-do-not-send="true">GitHub</a> | <a
                              href="https://www.npmjs.com/%7Epatrikx3"
                              target="_blank" moz-do-not-send="true">NPM</a> |
                            <a href="https://corifeus.com"
                              target="_blank" moz-do-not-send="true">Corifeus</a> |
                            +</font><span style="font-size:x-small">36
                            20 342 8046</span></div>
                        <div><br>
                          <br>
                        </div>
                      </div>
                    </div>
                  </div>
                </div>
              </div>
            </div>
          </div>
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      <pre wrap="">_______________________________________________
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    </blockquote>
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