Description:
This policy ensures that the LDAP certificates used by AWS Directory Service are monitored for expiration. Expired LDAP certificates can prevent users from logging in to AWS resources, so it is important to ensure that they are renewed before they expire.

Rationale:
LDAP certificates are used to encrypt LDAP traffic between AWS Directory Service and client applications. If an LDAP certificate expires, the encrypted traffic will no longer be secure, and users will not be able to log in to AWS resources.

Impact:
If an LDAP certificate expires, users will not be able to log in to AWS resources that use Directory Service. This could have a significant impact on business operations, as users would be unable to access applications and data.

Default Value:
AWS recommends that LDAP certificates be renewed 90 days before they expire.

Prerequisites:

  • Access to the AWS Directory Service console or the AWS CLI.
  • The ability to generate and import LDAP certificates.

Remediation Steps:

  • If an LDAP certificate is about to expire, renew the certificate.
  • If an LDAP certificate has expired, generate a new certificate and import it into Directory Service.

Test Plan:

  • Verify that the LDAP certificates are being monitored for expiration.
  • Verify that the LDAP certificates are renewed before they expire.

Implementation Plan:

  • Create a process for monitoring the LDAP certificates for expiration.
  • Create a process for renewing the LDAP certificates before they expire.

AWS CLI Process:

aws directoryservice describe-certificates aws directoryservice renew-certificate --certificate-id <certificate-id>

Using AWS GUI:

  1. Go to the AWS Directory Service console.
  2. Click on the "Certificates" tab.
  3. Select the LDAP certificate that is about to expire.
  4. Click on the "Renew" button.

Backout Plan:

  • If the LDAP certificate renewal fails, roll back the changes.
  • If the LDAP certificate renewal succeeds, but the LDAP traffic is still not secure, roll back the changes.

Note:

  • This policy should be implemented in conjunction with other policies that ensure the security of Directory Service.
  • For more information, see the AWS Directory Service documentation: https://docs.aws.amazon.com/directoryservice/latest/admin-guide/.

Reference:

  • AWS Directory Service documentation: https://docs.aws.amazon.com/directoryservice/latest/admin-guide/