openssl command-line tool can be used as a generic TLS/SSL client/server which connects to a remote host or accepts incoming connections using TLS/SSL. It's Windows version can be downloaded at https://www.slproweb.com/products/Win32OpenSSL.html. For example for the client:
openssl s_client -host HOSTNAME -port PORT -cert hostcert.pem -key hostkey.pem
openssl.exe s_client -host HOSTNAME -port PORT -cert hostcert.pem -key hostkey.pem -CAfile trustedCertificates.pem
For example for the server:
openssl s_server -port LISTEN_PORT -cert hostcert.pem -key hostkey.pem
openssl.exe s_server -port LISTEN_PORT -cert hostcert.pem -key hostkey.pem -CAfile trustedCertificates.pem
More details could be received using the
-debug options. The detailed description of these modes can be found at:
This article provides a detailed explanation of the TLS/SSL protocol, specifically the handshake protocol, its associated messages and alerts, and the record protocol.
There are third-party SSL/TLS tools which can be used as an SSL/TLS proxy. For example, stunnel can be used for this purpose.