Policy: AWS > CIS v1 > 4 Networking > 4.04 Ensure routing tables for VPC peering are "least access" (Not Scored) > Attestation

By setting this policy, you attest that you have manually verified that it complies with the relevant section of the CIS Benchmark.

Review routing tables of peered VPCs for whether they route all subnets of each VPC and whether that is necessary to accomplish the intended purposes for peering the VPCs. Via CLI: List all the route tables from a VPC and check if "GatewayId" is pointing to a <peering_connection_id> (e.g. pcx-1a2b3c4d) and if "DestinationCidrBlock" is as specific as desired. aws ec2 describe-route-tables --filter "Name=vpc-id,Values=<vpc_id>" --query "RouteTables[].{RouteTableId:RouteTableId, VpcId:VpcId, Routes:Routes, AssociatedSubnets:Associations[].SubnetId}"

Once verified, enter the date that this attestation expires. Note that the date can not be further in the future than is specified in AWS > CIS v1 > Maximum Attestation Duration. Set to a blank value to clear the attestation.