title: Azure Internal Load balancers not using their IP Address to return traffic
body: <p>I have an internal load balancer which is connected to another network via a gateway and IPSEC tunnel.</p>
  
  <p>During test I can receive traffic through the tunnel to it's load-balanced address (10.10.11.4).</p>
  
  <p>However if I sent traffic back (even from the node that received it) the traffic appears with the host IP's NOT the load balancer IP address so further routing goes wrong.</p>
  
  <p>It's designed to be used with UDP but I've tried both UDP and TCP protocols and the behaviour is the same. I've tried looking for documentation around this but I've found nothing, so I'm not what the intended behaviour is ?</p>
  
  <p>Can anyone help ?</p>