title: Ingress and SSL Passthrough
body: <p>I have recently been using the nginxdemo/nginx-ingress controller.</p>
  
  <p>As I understand it this controller cannot do SSL Passthrough (by that I mean pass the client certificate all the way through to the backend service for authentication), so instead I have been passing the clients subject DN through a header.</p>
  
  <p>Ultimately I would prefer SSL-Passthrough and have been looking at the kubernetes/ingress-nginx project which apparently supports SSL passthrough.</p>
  
  <p>Does anyone have an experience with this controller and SSL Passthrough.</p>
  
  <p>The few Ingress examples showing passthrough that I have found leave the path setting blank.</p>
  
  <p>Is this because passthrough has to take place at the TCP level (4) rather then at HTTP (7)?</p>
  
  <p>Right now, I have a single host rule that services mutiple paths.</p>