I'm trying to connect an EC2 instance in Account A to a PrivateLink that's set up in Account B. My EC2 instance in Account A has an Internet gateway and can communicate with other instances in its VPC. I want to know what specific infrastructure, rules, or configurations I need in Account A to ensure traffic is properly routed to the PrivateLink endpoint in Account B. Do I need to set up route table entries or a VPC endpoint in Account A?
3 Answers
To route traffic correctly, you'll need to ensure that the routing table in Account A has the appropriate entry pointing to the PrivateLink endpoint. Once the endpoint is established, it should appear as local traffic, making routing straightforward. And yes, setting security groups to allow that traffic is crucial!
You’re on the right track! The key is indeed setting the route table in Account A to include an entry directing traffic to the PrivateLink endpoint. It simplifies access and allows your EC2 instance to route to it efficiently. Just double-check the security group settings, too, to make sure the traffic is allowed from the EC2 instance.
To access a PrivateLink endpoint in Account B from your EC2 instance in Account A, you'll want to create a PrivateLink endpoint in Account A that connects to the PrivateLink in Account B. This setup acts as a logical connection
between the two accounts. Just remember to adjust your security group rules on both sides to allow the necessary inbound traffic from your EC2 instance.
Also, keep in mind that it's usually best to have the VPCs in the same region and ideally within the same availability zones to avoid extra data transfer costs.
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