I suspect that the message is associated with a class of unsupported historical SSL/TLS features. The truth is that Server Name Indication (SNI), the ability t

I suspect that the message is associated with a class of unsupported historical SSL/TLS features. The truth is that Server Name Indication (SNI), the ability to operate multiple hostnames with SSL/TLS on a single host, is one of the few backwards incompatible features of the modern web. The efficiency and flexibility of container and virtual machine server instances offered by Infrastructure-as-a-Service providers like Amazon AWS make the support of non-SNI clients a difficult proposition.