Had a barebones setup with a single conf file where the only 4 references to SSL were: 1. The LoadModule for mod_ssl. 2. Listen 443 https 3. Certificate and key specified inside a single vhost. The "SSLEngine on" directive was removed completely and the server restarted. After the restart, tried to access a file via HTTPS and could see the handshake occur and a successful file retrieval via HTTPS. Same setup on Windows using an Apache Lounge build on the same version seems to partially work (although the error log indicates a bad request). The documentation for SSLEngine indicates the default value is "SSLEngine off" and the documentation for the other 3 related directives do not indicate that they enable the SSL engine.