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    I've seen these requests while doing captive portal work.<br>
    <br>
    I've also noticed iOS interprets any wispr XML it finds in the reply
    html, which is part of its captive portal support.<br>
    <br>
     - Tim<br>
    <br>
    <div class="moz-cite-prefix">On 9/10/2013 4:59 PM, Andrew Cox wrote:<br>
    </div>
    <blockquote
cite="mid:CADnBZgu8mQPm1QdFvhrJjy0NzfRtp3Tj6ex_rHitZL0pp83riA@mail.gmail.com"
      type="cite">
      <div dir="ltr">For those interested, iOS requests <a
          moz-do-not-send="true"
          href="http://www.apple.com/library/test/success.html">http://www.apple.com/library/test/success.html</a>
        to check if it has internet access.
        <div><br>
        </div>
        <div>- Andrew</div>
      </div>
      <div class="gmail_extra"><br>
        <br>
        <div class="gmail_quote">On 8 October 2013 08:21, Michael Dale <span
            dir="ltr"><<a moz-do-not-send="true"
              href="mailto:mdale@dalegroup.net" target="_blank">mdale@dalegroup.net</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">
              <div><span
style="line-height:normal;text-indent:0px;letter-spacing:normal;text-align:-webkit-auto;font-variant:normal;text-transform:none;font-style:normal;white-space:normal;font-weight:normal;word-spacing:0px"><span
style="line-height:normal;text-indent:0px;letter-spacing:normal;text-align:-webkit-auto;font-variant:normal;text-transform:none;font-style:normal;white-space:normal;font-weight:normal;word-spacing:0px"><span>
                      <div
style="line-height:normal;text-indent:0px;letter-spacing:normal;text-align:-webkit-auto;font-variant:normal;text-transform:none;font-style:normal;white-space:normal;margin:0px;font-weight:normal;word-spacing:0px">iOS
                        has a similar thing too.</div>
                    </span></span></span></div>
              <div class="im">
                <br>
                <div>
                  <div>On 8 Oct 2013, at 9:20 am, Scott Howard <<a
                      moz-do-not-send="true"
                      href="mailto:scott@doc.net.au" target="_blank">scott@doc.net.au</a>>
                    wrote:</div>
                  <br>
                  <blockquote type="cite">
                    <div dir="ltr">Android uses this URL to determine if
                      it's behind a captive portal, and also to trigger
                      the captive portal.
                      <div>
                        <br>
                      </div>
                      <div>  Scott</div>
                    </div>
                  </blockquote>
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