no-unrestricted-route-to-igw - AWS Config
AWS CloudFormation template
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no-unrestricted-route-to-igw

Checks if there are public routes in the route table to an Internet gateway (IGW). The rule is NON_COMPLIANT if a route to an IGW has a destination CIDR block of '0.0.0.0/0' or '::/0' or if a destination CIDR block does not match the rule parameter.

Identifier: NO_UNRESTRICTED_ROUTE_TO_IGW

Resource Types: AWS::EC2::RouteTable

Trigger type: Configuration changes and Periodic

AWS Region: All supported AWS regions

Parameters:

routeTableIds (Optional)
Type: CSV

Comma-separated list of route table IDs that can have routes to an Internet Gateway with a destination CIDR block of '0.0.0.0/0' or '::/0'.

AWS CloudFormation template

To create AWS Config managed rules with AWS CloudFormation templates, see Creating AWS Config Managed Rules With AWS CloudFormation Templates.