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    I got it to work, using the "/tool dns-update" command. 
    Unfortunately, I have to key in the radio's IP address;  I haven't
    found a way to have the radio <b>automatically</b> update my DNS
    server.  However, on the MikroTik web site, there appear to be
    scripts I can adapt ...<br>
    <br>
    If you get your DHCP server to send assigned IP addresses to the DNS
    server for hamwan.net, then I can just CNAME to that.  There's no
    rush;  who knows if/when I will ever need/use it.<br>
    <br>
    <div class="moz-cite-prefix">On 2014-03-14 18:32, Ryan Elliott
      Turner wrote:<br>
    </div>
    <blockquote
cite="mid:CACHX6g86W33TXT2ysty01nHR+EX7=sOeDdoX1BxA4=5UiR_t-Q@mail.gmail.com"
      type="cite">
      <div dir="ltr">NB: most DDNS uses encryption, so watch out for
        that. <a moz-do-not-send="true"
          href="http://wiki.mikrotik.com/wiki/Manual:Tools/Dynamic_DNS">http://wiki.mikrotik.com/wiki/Manual:Tools/Dynamic_DNS</a> </div>
      <div class="gmail_extra">
        <br>
        <div class="gmail_quote">On Fri, Mar 14, 2014 at 8:30 PM, Nigel
          Vander Houwen <span dir="ltr"><<a moz-do-not-send="true"
              href="mailto:nigel@k7nvh.com" target="_blank">nigel@k7nvh.com</a>></span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">
            <div style="word-wrap:break-word">
              <ol>
                <li>Not presently. Eventually there will be some fancier
                  stuff that will route your "user subnet" to you, and
                  you'll get "link local" IPs over DHCP just to get
                  things started. For now, you just get a global IP, and
                  will *probably* get the same IP, but it's not
                  guaranteed.</li>
                <li>I'm not sure offhand.</li>
                <li>Presently no, but we are working on the <a
                    moz-do-not-send="true" href="http://hamwan.net"
                    target="_blank">hamwan.net</a> authoritative anycast
                  nameservers which will do this.</li>
              </ol>
              <div><br>
              </div>
              <div>
                Nigel K7NVH</div>
              <br>
              <div>
                <div>
                  <div class="h5">
                    <div>On Mar 14, 2014, at 6:29 PM, Dean Gibson AE7Q
                      <<a moz-do-not-send="true"
                        href="mailto:hamwan@ae7q.net" target="_blank">hamwan@ae7q.net</a>>
                      wrote:</div>
                    <br>
                  </div>
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                <blockquote type="cite">
                  <div>
                    <div class="h5">
                      <div bgcolor="#FFFFFF" text="#000000"> DNS
                        questions:<br>
                        <ol>
                          <li>Do I always get the same IP address (using
                            the same MAC)?  If so, I will just add it to
                            my DNS server.</li>
                          <li>If not, does that radio support DDNS
                            updates to a configurable BIND DNS server
                            (if, so I couldn't find it).</li>
                          <li>Do you create a hostname on an externally
                            visible domain?</li>
                        </ol>
                        <br>
                      </div>
                    </div>
                  </div>
                </blockquote>
              </div>
            </div>
          </blockquote>
        </div>
      </div>
    </blockquote>
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