Access Multi-party approval using an interface endpoint (AWS PrivateLink)

You can use AWS PrivateLink to create a private connection between your VPC and Multi-party approval. You can access Multi-party approval as if it were in your VPC, without the use of an internet gateway, NAT device, VPN connection, or Direct Connect connection. Instances in your VPC don't need public IP addresses to access Multi-party approval.

You establish this private connection by creating an interface endpoint, powered by AWS PrivateLink. We create an endpoint network interface in each subnet that you enable for the interface endpoint. These are requester-managed network interfaces that serve as the entry point for traffic destined for Multi-party approval.

For more information, see Access AWS services through AWS PrivateLink in the AWS PrivateLink Guide.

Considerations for Multi-party approval

Before you set up an interface endpoint for Multi-party approval, review Considerations in the AWS PrivateLink Guide.

Multi-party approval supports making calls to all of its API actions through the interface endpoint.

VPC endpoint policies are not supported for Multi-party approval. By default, full access to Multi-party approval is allowed through the interface endpoint. Alternatively, you can associate a security group with the endpoint network interfaces to control traffic to Multi-party approval through the interface endpoint.

Create an interface endpoint for Multi-party approval

You can create an interface endpoint for Multi-party approval using either the Amazon VPC console or the AWS Command Line Interface (AWS CLI). For more information, see Create an interface endpoint in the AWS PrivateLink Guide.

Create an interface endpoint for Multi-party approval using the following service name:

com.amazonaws.region.mpa

If you enable private DNS for the interface endpoint, you can make API requests to Multi-party approval using its default Regional DNS name. For example, com.amazonaws.us-east-1.mpa.

Create an endpoint policy for your interface endpoint

An endpoint policy is an IAM resource that you can attach to an interface endpoint. The default endpoint policy allows full access to Multi-party approval through the interface endpoint. To control the access allowed to Multi-party approval from your VPC, attach a custom endpoint policy to the interface endpoint.

For more information, see Control access to services using endpoint policies in the AWS PrivateLink Guide.

Example: VPC endpoint policy for Multi-party approval actions

The following is an example of a custom endpoint policy. When you attach this policy to your interface endpoint, it grants access to the listed Multi-party approval actions for all principals on all resources.

{
   "Statement": [
      {
         "Principal": "*",
         "Effect": "Allow",
         "Action": [
            "mpa:GetIdentitySource",
            "mpa:GetApprovalTeam"
         ],
         "Resource":"*"
      }
   ]
}