Which network ports should be opened for secure LDAP connections?

For secure LDAP connections, the correct ports are essential to ensure the secure transmission of authentication and directory services data. In this case, port 3268 is specifically used for the Global Catalog service in Active Directory when clients access directory information over LDAP. This is particularly relevant when secure LDAP (LDAPS) is involved, as it provides an encrypted channel for the transmission of sensitive information.

While other ports serve important functions within networking and security, they do not pertain to secure LDAP specifically. Port 443 is commonly used for HTTPS traffic, port 989 is utilized for FTPS (FTP Secure), and port 3389 is associated with Remote Desktop Protocol (RDP). These ports facilitate different types of network services and do not relate to the operations of secure LDAP, making the choice of port 3268 necessary for secure LDAP connections.