What does LDAP/S do for traffic between the Domain Controller and Vault?

Using LDAP/S between the Domain Controller and Vault is primarily focused on securing the communication channel. LDAP/S, or LDAP over SSL/TLS, encrypts all traffic that passes between the two endpoints. This encryption protects sensitive information, such as authentication credentials and queries, from being intercepted by unauthorized parties during transmission. By ensuring that the data is encrypted, LDAP/S also helps maintain data integrity and confidentiality, enhancing overall security posture.

The functionality of encrypting traffic is crucial in environments where sensitive data is being transmitted, and it is a standard practice in securing directory services. This secure channel is necessary to prevent potential attacks that could compromise the security of user authentication and other sensitive interactions with the Vault.

In contrast, other options imply functionalities that either contradict the purpose of LDAP/S or are unrelated to its primary goal. For example, unencrypted traffic would expose sensitive data, while fast data transfer is not a characteristic feature associated with LDAP/S encryption; performance might be slightly affected due to the overhead of encryption. Additionally, filtering incoming requests does not accurately describe what LDAP/S does, as filtering is typically related to access control or firewall capabilities, rather than encryption of data in transit.