title: Slack - behind a “firewall“
body: <p>I've try to create a slackbot. Works fine, but my problems are calls from slack to my rest api. My app is an internal service, so it's not available from the internet. I have seen that outgoing webhooks is possible to set, but I have to forward the request back to the internal service which I don't like very much. As far as I know slack is based on websockets, so is it possible to write a bot which run behind my “firewall“ and  get it's commands via websocket?</p>
  
  <p>Greetings
  Tonka</p>