title: iOS: Open a Welcome Page in Safari, not CNA (post-authentication)
body: <p>I'm running a captive portal, target audience are mobile devices only. I would like to open a "welcome page" to the user <strong>after</strong> he authenticated in the CNA. This page should open in (mobile) Safari, not in the CNA, because it contains interactive elements that don't work in the limited CNA environment.</p>
  
  <p>I've seen this working at other portals before, but I don't know how they do it and can't figure out how even after long research.</p>
  
  <p>What I <strong>have</strong> is:</p>
  
  <ul>
  <li>captive portal / captive network is working</li>
  <li>users connecting get the splash page shown in popup (CNA)</li>
  <li>since I don't need authentication, they are connected at this point, and the top-right button shows "OK"</li>
  </ul>
  
  <p>What I <strong>want</strong> is:</p>
  
  <ul>
  <li>a link or button on this splash page that opens a Safari window</li>
  </ul>
  
  <p>or</p>
  
  <ul>
  <li>some JavaScript, redirect, whatever else that opens a Safari window when the CNA is closed.</li>
  </ul>
  
  <p>Nothing I found so far (e.g. using target="_system" was mentioned) works. Does anyone know how these hotel and other portals that somehow manage to do it, do it?</p>