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    <div class="moz-cite-prefix">Oh, I thought this was an
      external-versus-internal scenario. But, this is even easier.<br>
       <br>
      A) One of the nameservers (pick DNS1 or DNS2) becomes a slave (of
      the "stealth" variety, if you want) of the other<br>
      B) People use nsupdate to maintain the zone<br>
      <br>
      For security, TSIG-sign the updates. For fast change propagation,
      set up NOTIFY if and as necessary.<br>
      <br>
                                                                     
                                                                      -
      Kevin<br>
      <br>
      On 4/30/2014 4:32 PM, Jeronimo L. Cabral wrote:<br>
    </div>
    <blockquote
cite="mid:CAK7KTbi58MCnMYJ5DaC5FZiFe=g=Jbt7Q6hi0pkqvcBtdEkOaQ@mail.gmail.com"
      type="cite">
      <div dir="ltr">Dear John, this is my scenario:
        <div><br>
        </div>
        <div style="">1) Office 1: people work with some machines and
          fill up a local master zone "<a moz-do-not-send="true"
            href="http://company.com">company.com</a>" with records in
          DNS1</div>
        <div style="">2) Office 2: people works with some others
          machines and fill up a local master zone "<a
            moz-do-not-send="true" href="http://company.com">company.com</a>"
          with another records in DNS2</div>
        <div style=""><br>
        </div>
        <div style="">So both office have a different master zone.</div>
        <div style=""><br>
        </div>
        <div style="">Both offices belong to the same company, so I need
          that any client PC can resolve a hostname from "<a
            moz-do-not-send="true" href="http://company.com">company.com</a>"
          domain, independently if this record is in DNS1 or DNS2. </div>
        <div style=""><br>
        </div>
        <div style="">Thanks again, regards.</div>
        <div style=""><br>
        </div>
        <div style="">JeLo</div>
        <div style=""><br>
        </div>
      </div>
      <div class="gmail_extra"><br>
        <br>
        <div class="gmail_quote">On Wed, Apr 30, 2014 at 5:21 PM, John
          Miller <span dir="ltr"><<a moz-do-not-send="true"
              href="mailto:johnmill@brandeis.edu" target="_blank">johnmill@brandeis.edu</a>></span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">
            <div dir="ltr">
              <div>Hi Jeronimo,<br>
                <br>
              </div>
              <div>First of all, please just tell us the real domain. 
                Yes, we could try and talk about a fictitious "<a
                  moz-do-not-send="true" href="http://example.com"
                  target="_blank">example.com</a>" or "<a
                  moz-do-not-send="true" href="http://company.com"
                  target="_blank">company.com</a>," but having the real
                domain name lets us actually query your nameservers.<br>
              </div>
              <div><br>
              </div>
              <div>Let me be sure I understand: you have two DNS
                servers.  Each of them is authoritative for the same
                domain.  Are both set as master?<br>
                <br>
              </div>
              <div>The two servers have different copies of the
                zone--what's your reason for that?<br>
                <br>
              </div>
              <div>If both servers think they are authoritative for a
                zone, then they will answer recursive queries for those
                zones themselves.  From the manual: <br>
                <br>
                "Forwarding occurs only on those queries for which the
                server is not authoritative and does not have the answer
                in its cache."<br>
                <br>
              </div>
              <div>What exactly are you trying to achieve?<br>
                <br>
              </div>
              <div>John<br>
              </div>
              <div><br>
              </div>
            </div>
            <div class="gmail_extra"><br>
              <br>
              <div class="gmail_quote">
                <div>
                  <div class="h5">On Wed, Apr 30, 2014 at 3:55 PM,
                    Jeronimo L. Cabral <span dir="ltr"><<a
                        moz-do-not-send="true"
                        href="mailto:jelocabral@gmail.com"
                        target="_blank">jelocabral@gmail.com</a>></span>
                    wrote:<br>
                  </div>
                </div>
                <blockquote class="gmail_quote" style="margin:0 0 0
                  .8ex;border-left:1px #ccc solid;padding-left:1ex">
                  <div>
                    <div class="h5">
                      <div dir="ltr"><span
                          style="color:rgb(51,51,51);font-family:Helvetica,FreeSans,'Liberation
Sans',Helmet,Arial,sans-serif;font-size:13px;line-height:17px">Dear, I
                          would like to ask for solution related with
                          DNS (bind) configuration to allow </span><span
                          style="color:rgb(51,51,51);font-family:Helvetica,FreeSans,'Liberation
Sans',Helmet,Arial,sans-serif;font-size:13px;line-height:17px">forward
                          requests to another DNS but related with the
                          same domain.</span><br
                          style="color:rgb(51,51,51);font-family:Helvetica,FreeSans,'Liberation
Sans',Helmet,Arial,sans-serif;font-size:13px;line-height:17px">
                        <br
                          style="color:rgb(51,51,51);font-family:Helvetica,FreeSans,'Liberation
Sans',Helmet,Arial,sans-serif;font-size:13px;line-height:17px">
                        <div><span
                            style="color:rgb(51,51,51);font-family:Helvetica,FreeSans,'Liberation
Sans',Helmet,Arial,sans-serif;font-size:13px;line-height:17px">I'm
                            asking about two authoritative name servers
                            serving the same domain but with different
                            zone file info on each and have one of them
                            forward recursive queries to another one if
                            first one cannot find some particular
                            subdomain record that is missing in his
                            version of zone file.</span><br>
                        </div>
                        <div><span
                            style="color:rgb(51,51,51);font-family:Helvetica,FreeSans,'Liberation
Sans',Helmet,Arial,sans-serif;font-size:13px;line-height:17px"><br>
                          </span></div>
                        <div><span
                            style="color:rgb(51,51,51);font-family:Helvetica,FreeSans,'Liberation
Sans',Helmet,Arial,sans-serif;font-size:13px;line-height:17px">My
                            named.conf.local is as follow, but it
                            doesn't work:</span></div>
                        <div><span
                            style="color:rgb(51,51,51);font-family:Helvetica,FreeSans,'Liberation
Sans',Helmet,Arial,sans-serif;font-size:13px;line-height:17px"><br>
                          </span></div>
                        <div>
                          <div><font face="Helvetica, FreeSans,
                              Liberation Sans, Helmet, Arial,
                              sans-serif" color="#333333"><span
                                style="line-height:17px">zone "<a
                                  moz-do-not-send="true"
                                  href="http://company.com"
                                  target="_blank">company.com</a>" {</span></font></div>
                          <div><font face="Helvetica, FreeSans,
                              Liberation Sans, Helmet, Arial,
                              sans-serif" color="#333333"><span
                                style="line-height:17px">    type
                                master;</span></font></div>
                          <div><font face="Helvetica, FreeSans,
                              Liberation Sans, Helmet, Arial,
                              sans-serif" color="#333333"><span
                                style="line-height:17px">    file
                                "/etc/bind/zones/company.com.db";</span></font></div>
                          <div><font face="Helvetica, FreeSans,
                              Liberation Sans, Helmet, Arial,
                              sans-serif" color="#333333"><span
                                style="line-height:17px">   
                                allow-transfer { key "company"; };</span></font></div>
                          <div><font face="Helvetica, FreeSans,
                              Liberation Sans, Helmet, Arial,
                              sans-serif" color="#333333"><span
                                style="line-height:17px">    check-names
                                ignore;</span></font></div>
                          <div><font face="Helvetica, FreeSans,
                              Liberation Sans, Helmet, Arial,
                              sans-serif" color="#333333"><span
                                style="line-height:17px">    forward
                                first;</span></font></div>
                          <div><font face="Helvetica, FreeSans,
                              Liberation Sans, Helmet, Arial,
                              sans-serif" color="#333333"><span
                                style="line-height:17px">    forwarders
                                { 172.16.1.1; };</span></font></div>
                          <div><font face="Helvetica, FreeSans,
                              Liberation Sans, Helmet, Arial,
                              sans-serif" color="#333333"><span
                                style="line-height:17px">};</span></font></div>
                          <div><font face="Helvetica, FreeSans,
                              Liberation Sans, Helmet, Arial,
                              sans-serif" color="#333333"><span
                                style="line-height:17px"><br>
                              </span></font></div>
                          <div><font face="Helvetica, FreeSans,
                              Liberation Sans, Helmet, Arial,
                              sans-serif" color="#333333"><span
                                style="line-height:17px">Thanks a lot, </span></font></div>
                          <div><font face="Helvetica, FreeSans,
                              Liberation Sans, Helmet, Arial,
                              sans-serif" color="#333333"><span
                                style="line-height:17px"><br>
                              </span></font></div>
                          <div><font face="Helvetica, FreeSans,
                              Liberation Sans, Helmet, Arial,
                              sans-serif" color="#333333"><span
                                style="line-height:17px">JeLo</span></font></div>
                          <div
                            style="color:rgb(51,51,51);font-family:Helvetica,FreeSans,'Liberation
Sans',Helmet,Arial,sans-serif;font-size:13px;line-height:17px">
                            <br>
                          </div>
                        </div>
                      </div>
                      <br>
                    </div>
                  </div>
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                  </div>
                </blockquote>
              </div>
              <span class="HOEnZb"><font color="#888888"><br>
                  <br clear="all">
                  <br>
                  -- <br>
                  John Miller<br>
                  Systems Engineer<br>
                  Brandeis University<br>
                  <a moz-do-not-send="true"
                    href="mailto:johnmill@brandeis.edu" target="_blank">johnmill@brandeis.edu</a><br>
                  (781) 736-4619
                </font></span></div>
            <br>
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          </blockquote>
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      <pre wrap="">_______________________________________________
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