AWS VPN NATing basic

Question

I have a VPN connection to AWS and need to access my EC2 instance at, say, 10.1.0.40.    I already have a subnet locally for 10.1.0.x/24. How can I NAT the address in AWS so that when it receives data through this VPN, it maps, say 10.1.50.40 to 10.1.0.40?

I can't seem to find the any suitable solution on AWS. NAT instances and NAT gateways all talk about accessing the Internet from a private server and seem to have little to do with this simple address translation from a VPN connection.

Better ideas?

Answer 1

You cannot solve the problem of CIDR overlap when setting up a VPN connection by using AWS NAT Gateway. For this to work either

• NATing should happen from On-Premise.
• Create a new private subnet to represent EC2 instance in your VPC side.
• You can adopt to Third-party VPN solution hosting on an EC2 instance, instead of using VPC native VPN to support your use case.