VPN Connections

VPN (Virtual Private Network) connections provide a secure and encrypted connection between two or more VPCs (Virtual Private Clouds).

In AWS, VPN connections can be established using the AWS Site-to-Site VPN service. This service allows you to connect your on-premises network to your VPC over the Internet using IPSec (Internet Protocol Security) VPN tunnels.

To configure VPN connections between VPCs:

1. Create Customer Gateways: A customer gateway represents your side of the VPN connection. You need to create a customer gateway for each on-premises network that you want to connect to the VPC.

1const customerGateway = new CustomerGateway({
2  bgpAsn: 65000,
3  ip: '203.0.113.1',
4});

2. Create Virtual Private Gateways: A virtual private gateway is the VPN concentrator on the AWS side of the VPN connection. You need to create a virtual private gateway and attach it to the VPC.

1const vpnGateway = new VpnGateway({
2  amazonSideAsn: 64512,
3});
4
5const attachment = new VpnGatewayAttachment({
6  vpcId: vpc.vpcId,
7  vpnGatewayId: vpnGateway.vpnGatewayId,
8});

3. Create VPN Connections: A VPN connection is the combination of a customer gateway and a virtual private gateway. You need to create a VPN connection and specify the customer gateway and virtual private gateway to use.

1const vpnConnection = new VpnConnection({
2  type: 'ipsec.1',
3  customerGatewayId: customerGateway.customerGatewayId,
4  vpnGatewayId: vpnGateway.vpnGatewayId,
5});

4. Configure Routing: Once the VPN connection is established, you need to configure the routing to enable communication between the VPCs. This can be done by updating the route tables and associated route propagation settings.

1const route = new Route({
2  routeTableId: routeTable.routeTableId,
3  destinationCidrBlock: '10.0.0.0/16',
4  vpnConnectionId: vpnConnection.vpnConnectionId,
5});

VPN connections provide a secure and scalable solution for connecting VPCs and on-premises networks. By configuring VPN connections, you can establish private and encrypted communication channels between different network environments.

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