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To set the route for your private NAT gateway:
- Create a public subnet to host the NAT gateway.
- Create a NAT gateway within the public subnet and assign an Elastic IP address.
- Create a custom route table for the public subnet with a route to the internet gateway.
- Update the route tables of your private subnets to direct internet traffic to the NAT gateway. The route should have a destination of 0.0.0.0/0 and a target of the NAT gateway.
- Verify connectivity by pinging public internet addresses from instances in the private subnets. Traffic should be routed through the NAT gateway.
Is there any way to set the NAT without Elastic IP? I know the EC2 is working fine with Elastic IP. But it's charging for the ipv4, I changed the instance to ipv6-only, and I can access it. The only thing is I have some scripts on the instance and they are using ipv4 to access other web resources.