Best Practices for Secure ELB Management Using the CLI

Best Practices for Secure ELB Management Using the CLI

1. Use least-privilege IAM credentials

• Create IAM policies scoped to specific ELB actions and resources instead of using overly broad permissions.
• Use IAM roles for EC2 instances or CI/CD runners so long-lived credentials aren’t stored on hosts.

2. Rotate and avoid long-lived credentials

• Prefer short-lived credentials (STS AssumeRole) for CLI sessions.
• Rotate access keys regularly and remove unused keys.

3. Use MFA for sensitive operations

• Require MFA for users who can modify or delete load balancers or change listeners and certificates.

4. Encrypt CLI credentials and config

• Store CLI config files and credentials in encrypted disk volumes or use OS keyrings where supported.
• Restrict filesystem permissions on ~/.aws/credentials (or equivalent) to the minimum required.

5. Validate and test commands in non-production first

• Run CLI changes in staging or with a dry-run where available to avoid misconfigurations that could expose traffic.

6. Protect TLS/HTTPS configurations

• Use strong ciphers and TLS versions; prefer managed certificates from a trusted CA.
• Rotate certificates before expiration and automate renewals where possible.

7. Enforce secure listener and target settings

• Ensure listeners use HTTPS/TLS where appropriate, and avoid forwarding plaintext traffic unless inside a trusted VPC.
• Health checks should use HTTPS and limited, non-sensitive response endpoints.

8. Audit CLI usage and changes

• Enable CloudTrail (or equivalent) to log all API calls made by the CLI.
• Send logs to a secure, immutable store and monitor for unusual activity (new listeners, security group changes).

9. Minimize public exposure

• Place internal services behind internal-only load balancers or put ELBs in private subnets when public access isn’t needed.
• Use security groups and network ACLs to restrict client IP ranges.

10. Automate idempotent, reviewed deployments

• Use Infrastructure-as-Code (Terraform, CloudFormation, etc.) to manage ELB configurations and apply CLI changes via reviewed pipelines to reduce human error.

11. Secure automation credentials

• Store automation credentials in a secrets manager with fine-grained access, not in plain-text repo variables.
• Limit who and what can assume automation roles.

12. Confirm rollback and backup strategies

• Keep versioned configs or IaC state so you can quickly revert risky ELB changes made via CLI.

13. Regularly scan for misconfigurations

• Use security tools to detect open listeners, weak ciphers, or publicly exposed internal load balancers.

14. Limit metadata exposure in health and routing

• Avoid health endpoints returning sensitive data; minimize headers that leak internal info.

Quick checklist

• IAM least-privilege | Short-lived creds | MFA enabled
• Encrypt credentials | Audit logs enabled | Private where possible
• TLS best practices | Automated, reviewed IaC | Secrets manager for automation

If you want, I can generate a sample IAM policy for CLI users with minimal ELB permissions or an example Terraform module to manage ELBs securely.