To set up a free VPN using AWS EC2,follow these organized steps:

1. Set Up Your Virtual Machine:

   • Navigate to the AWS Console and create a new VPC.
   • Connect your physical laptop to the EC2 instance using a tool like vpc-config or a software tool like vpc-config to configure the connection.

2. Configure the VPC with Private IPs:

   • Add private IP addresses to your VPC. Include at least two private IPs: one for your local machine and one for the VPN.
   • Ensure your public IP is available in the EC2 instances and set it as the public IP for your VPC.

3. Configure Allow/Allow Traffic:

   In the VPC settings, enable "Allow from public to private" and "Allow from private to public" to ensure traffic flows correctly.

4. Create the VPN Service:

   • Create a new function called "my-vpn" in AWS Functions.
   • Specify the public IP, private IP, and port (e.g., 88 for outgoing, 8443 for incoming).
   • Ensure ports are public for others to access.

5. Set Up Firewall on Physical Laptop:

   Enable "Private IP to local machine" in your firewall configuration to allow traffic from the private IP to your local machine.

6. Configure NAT on EC2 Instance:

   Use AWS NAT to forward traffic from your private IP to the VPN. Add a NAT rule on the EC2 instance that forwards traffic from your private IP to the VPN's service.

7. Set Up NAT Server:

   Use AWS NAT to create a server on your private IP that forwards traffic to the VPN service.

8. Connect EC2 Instance to Physical Laptop:

   • Use a web interface or ec2connect to connect EC2 to your physical laptop.
   • Test the VPN connection to ensure it works.

9. Configure Firewall Policies:

   Create a firewall policy on your physical laptop to block any NAT or other services that block your private IP.

10. Update Certificates:

    • Create a certificate with your public IP and sign it with your AWS private key using aws carp certificate or aws certificate.
    • Update the certificate to use your signed certificate for SSL/TLS.

11. Configure SSL/TLS:

    Use the signed certificate to set SSL/TLS in your firewall.

12. Set Up Username and Password:

    Create an account on AWS Side and set the username to your local name. Configure the account to use the VPN service.

13. Set Up Internet Proxy:

    • Configure an HTTP proxy on your EC2 instance using ec2proxy to use your local internet connection.

14. Backup Strategy:

    Set up a backup plan on AWS Side to secure your VPN account.

15. Security Best Practices:

    Keep credentials secure and update AWS accounts regularly.

By following these steps, you'll set up a free VPN using AWS EC2 with your private IP and public IP, ensuring secure internet access.