Solution

If the API frontend supports HTTPS, you need to add an SSL certificate for the independent domain name bound to the API group. An SSL certificate is used for data encryption and identity authentication. If an SSL certificate contains a CA certificate, client authentication (two-way authentication) is enabled by default. Or one-way authentication will be used.

• One-way authentication: When a client connects to a server, the client verifies the validity of the SSl certificate of the server.
• Two-way authentication: When a client connects to a server, both the client and server verify the validity of the SSl certificate.