How do I enable communication between an EC2-Classic instance and resources in a VPC?
If all the resources are in the same AWS account, you can enable communication between EC2-Classic instances and the instances in the VPC on the other side of the VPC peering connection by creating a VPC peering connection between the two VPCs, enabling ClassicLink for one of the VPCs, and linking the EC2-Classic instance to one of the VPCs using ClassicLink.
You can either enable a local VPC to communicate with a linked EC2-Classic instance in a peered VPC, or you can enable a local linked EC2-Classic instance to communicate with instances in a peered VPC.
To enable VPC peering to allow communication between an EC2-Classic instance and peered VPC resources:
- Open the VPC console.
- From the navigation bar, choose Peering Connections.
- Select the VPC peering connection, and from the Actions menu, choose Edit ClassicLink Settings.
- Select Allow local ClassicLink instances communication with VPC instances in peered VPC and Allow peered VPC instances communication with ClassicLink instances in local VPC.