title: Monitoring a shiny app shared in my internal network
body: <p>Is there any way to keep track of users accessing my shiny app that is shared internally, through:</p>
  
  <pre><code>runApp(list(ui=ui, server=server), host="0.0.0.0", port=1234)
  </code></pre>
  
  <p>Also, I was wondering if one can add semaphores to restrict the access of some IPs.</p>
  
  <p>Thank you.</p>