title: Using AWS Load Balancer as a Tunneling Proxy
body: <p>I have ETL servers in a private subnet in my VPC on AWS. These ETL servers are locked down with specific outbound rules per approved outbound IP addresses. I have a service these ETL tools need to communicate with outside the VPC using TLS1.2/443 that uses a DNS name and not an IP address. Let's say "account.service.com". For this reason, it was suggested I consider using an elastic load balancer in the public subnet as a proxy. </p>
  
  <p>If I send requests to the ELB private IP address from the ETL instance, how do I tell the ELB to send those requests on to "account.service.com"? </p>
  
  <p>Essentially, I want the ELB to work as a tunneling proxy, since I can't specify "account.service.com" in my outbound security group rules in the private subnet. </p>