A web service that we use is switching to using SNI (Server Name Indication) for TLS1.2 connections. In a nutshell, we need to specify the servername that we are trying to connect to when making a secure TCP connection. I suspected that PXPlus was ahead of the game and already added support for this, and I wasn't disappointed!
In testing this on Linux server with the latest OpenSSL libraries, I found that I can successfully make a connection using version 14 (ie: tcb(29)=14100000), but not when using version 12 (ie: tcb(29)=12500000).
Can you confirm that SNI is supported by PXPlus, and what version it was added? Also, is there any documentation on how it works or modifying how it works (for example, is there a method to specify a different servername using a tcp_opt with the [TCP] command, such as "SERVERNAME=xxxxx")?