An Overview of Security-Related Packages

To enable the secure server, you must have the following packages installed at a minimum:

httpd: The httpd package contains the httpd daemon and related utilities, configuration files, icons, Apache HTTP Server modules, man pages, and other files used by the Apache HTTP Server.

mod_ssl: The mod_ssl package includes the mod_ssl module, which provides strong cryptography for the Apache HTTP Server via the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols.
openssl: The openssl package contains the OpenSSL toolkit. The OpenSSL toolkit implements the SSL and TLS protocols, and also includes a general purpose cryptography library.

Additionally, other software packages provide certain security functionalities (but are not required by the secure server to function):