title: MediaWiki page edit causes "Load denied by X-Frame-Options: does not permit cross-origin framing"
body: <p>I am running a MediaWiki on a VM, accessing it through <a href="http://12.34.56.78/wiki" rel="nofollow">http://12.34.56.78/wiki</a> -- I was able to edit pages.</p>
  
  <p>Now I've redirected my domain <a href="http://foo.org" rel="nofollow">http://foo.org</a> to <a href="http://12.34.56.78/wiki" rel="nofollow">http://12.34.56.78/wiki</a></p>
  
  <p><a href="http://foo.org/wiki" rel="nofollow">http://foo.org/wiki</a> does indeed find my wiki, but when I attempt to edit a page I get a blank page. Inspecting the console yields: </p>
  
  <blockquote>
    <p><strong><em>Load denied by X-Frame-Options: does not permit cross-origin framing</em></strong></p>
  </blockquote>
  
  <p>What is the cause of the problem? And what is the solution?</p>