AWS Config Rules: No Unrestricted Route to IGW
NO_UNRESTRICTED_ROUTE_TO_IGW
Eduardo Van Cauteren
Last Update 2 maanden geleden
Description: 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.
Trigger type: Configuration changes
AWS Region: All supported AWS regions
This config rule checks whether there are public routes in the route tables to a certain IGW. The rule will be marked as non-compliant if the Internet Gateway is found with a destination CIDR block of '0.0.0.0/0' or '::/0'.
In order to resolve this, go to VPC service within the AWS Console, click on Route Tables and find the table that is out of compliance. Finally click on its name.
Under the Routes tab, remove or edit the destination CIDR block pointing to 0.0.0.0/0 to make the rule compliant. Be careful when editing routes to avoid service interruption in your infrastructure.
Check the following screenshot as reference:
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