As discussed in the introduction to this section, we need to install Apache HTTPD and PHP on the servers. We also need to install the mod_ssl plugin for Apache, which enables TLS/SSL support. Run the commands
# yum -y install httpd
# yum -y install mod_ssl
# yum -y install php
on casdev-casapp and casdev-samlsp to install these packages. It is not necessary (or desirable) to install HTTPD and PHP on casdev-srv01, casdev-srv02, or casdev-srv03.