title: Two EC2 instances can't see each other in the private network
body: <p><strong>My initial goal:</strong> Create a OpenVPN access server on AWS so I can only connect to another EC2 instance using the VPN. The second EC2 instance is not allowed to have any kind of public access.</p>
  
  <p>This didn't work for me because the VPN wouldn't let me connect to the EC2 instance. I always got a timeout. After some troubleshooting I found out that they are not in the same private network so they can't see each other. They are in the same VPC and in the same Subnet. The security groups are both wide open. I realized it could be an issue with OpenVPN and my config.</p>
  
  <p>The second EC2 instance is a normal Windows Server 2019 instance.</p>
  
  <p>So I opened a 3rd EC2 instance that is also running Windows Server 2019. I used the remote desktop to control the second EC2 instance. After opening cmd and using <code>ipconfig</code> and <code>apr -a</code> I couldn't find the 3rd EC2 instance again in the local network. Showing me again that they are not in the same local network. How can I set the EC2 instances up so they are both on the same local network?</p>