The new networking layer in v15 does not use the '^' character to distinguish between the clear and encrypted modes.

Instead, the application server always listens in clear and comminucates the very first data packet in clear. If secure mode is enabled then the first packet is handled in clear and then an upgrade to TLS is triggered.

In light of this new behavior, testing the encrypted connection via command line openssl tools do not work as they did with v13 and v14.