ALB Product Supporting SNI

The ALB product now supports the SNI feature, primarily addressing the drawback that a single listener could only use one certificate. When an HTTPS listener is created, SNI is enabled by default. During the SSL handshake request initiated by the client, the domain name information of the request is submitted, and upon receiving the SSL request, ALB will search for the corresponding certificate based on the requested domain name—returning the matched certificate if found, or the default certificate if no matching domain name certificate is available.

ALB supports this feature by default when configuring an HTTPS listener, meaning it supports binding multiple certificates.