Rule: VPC EIPs Should Be Associated with an EC2 Instance or ENI
This rule ensures that VPC Elastic IPs are properly linked to EC2 instances or Elastic Network Interfaces (ENIs).
| Rule | VPC EIPs should be associated with an EC2 instance or ENI |
| Framework | Federal Financial Institutions Examination Council (FFIEC) |
| Severity | ✔ High |
VPC Elastic IP Address Association Rule for FFIEC Compliance
Description of the Rule
In order to comply with the Federal Financial Institutions Examination Council (FFIEC) guidelines, all Elastic IP addresses (EIPs) within a Virtual Private Cloud (VPC) must be actively associated with an Amazon EC2 instance or Elastic Network Interface (ENI). This ensures efficient utilization of IP addresses and reduces the risk of cyber-attacks on unassociated, publicly-exposed IP addresses.
Troubleshooting Steps
To enforce and troubleshoot this rule, follow these steps:
1. Audit Your EIPs
Conduct an audit of all existing EIPs to ensure that they are attached to EC2 instances or ENIs. You can use the AWS Management Console or the AWS Command Line Interface (CLI) for this purpose.
2. Identify Unassociated EIPs
List all EIPs and check their association status. An EIP with no instance or ENI associated will need remediation.
3. Associate or Release Unassociated EIPs
For unassociated EIPs, you should determine if they need to be associated with an instance or released back to AWS.
Necessary Codes or CLI Commands
List all EIPs and their association status:
aws ec2 describe-addresses --query "Addresses[?AssociationId==null].PublicIp"
Associate an EIP to an EC2 instance:
aws ec2 associate-address --instance-id i-1234567890abcdef0 --public-ip 198.51.100.1
Replace
i-1234567890abcdef0198.51.100.1Associate an EIP to an ENI:
aws ec2 associate-address --network-interface-id eni-12345678 --allocation-id eipalloc-12345678
Replace
eni-12345678eipalloc-12345678Release an unassociated EIP:
aws ec2 release-address --allocation-id eipalloc-12345678
Replace
eipalloc-12345678Step by Step Guide for Remediation
1. Log into AWS Management Console or AWS CLI.
2. Execute the necessary commands to list unassociated EIPs.
3. Review the output and for each unassociated EIP, decide whether to associate it with an instance/ENI or release it.
4. For the association, use the respective CLI command to tie the EIP with a resource.
5. If the EIP is not needed, release it to avoid potential security risks and potential non-compliance with FFIEC regulations.
By following these steps and utilizing the provided CLI commands, you should be able to ensure compliance with FFIEC guidelines regarding EIP associations within your AWS VPC, which can contribute to a strong SEO strategy by demonstrating adherence to industry regulations and standards.
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