Verify Stateless Network Firewall Rule Groups Are Not Empty
Checks if stateless rule groups in AWS Network Firewall contain rules to ensure they are effectively processing traffic.
| Rule | Stateless Network Firewall rule group should not be empty |
| Framework | AWS Foundational Security Best Practices |
| Severity | ✔ Medium |
Rule Description:
In AWS Foundational Security Best Practices, it is recommended that the stateless network firewall rule group should not be empty. This is essential to maintain the security of your AWS environment by ensuring that network traffic is properly controlled and monitored.
Troubleshooting Steps:
If the stateless network firewall rule group is empty, it can lead to potential security vulnerabilities and risks. To troubleshoot and rectify this issue, follow the steps below:
- 1.Check Firewall Rules: Review the existing firewall rules in the security group associated with the network resources.
- 2.Add Necessary Rules: Identify the required inbound and outbound rules for your network resources and add them to the firewall rule group.
- 3.Test Connectivity: After adding the rules, test the connectivity to ensure that legitimate traffic is allowed and unauthorized traffic is blocked.
Remediation Steps:
To address the issue of an empty stateless network firewall rule group in AWS, follow the steps below:
- 1.Identify Security Group: Determine the security group associated with the network resources that have an empty rule group.
- 2.Add Inbound Rules:
Replaceaws ec2 authorize-security-group-ingress --group-id <security-group-id> --protocol <protocol> --port <port> --cidr <CIDR range>
,<security-group-id>
,<protocol>
, and<port>
with the appropriate values for your network setup.<CIDR range> - 3.Add Outbound Rules:
Replaceaws ec2 authorize-security-group-egress --group-id <security-group-id> --protocol <protocol> --port <port> --cidr <CIDR range>
,<security-group-id>
,<protocol>
, and<port>
with the required values for outbound traffic.<CIDR range> - 4.Verify Rules: Use the AWS Management Console or CLI to verify that the firewall rule group is no longer empty.
- 5.Monitor Traffic: Regularly monitor network traffic to ensure that the firewall rules are effectively filtering traffic.
By following these remediation steps, you can ensure that the stateless network firewall rule group is populated with necessary rules, enhancing the security of your AWS environment.