edit /etc/httpd/conf/httpd.conf


# Force

 to use SSL
RewriteEngine on
RewriteCond   %{SERVER_PORT}  !^443$
RewriteRule ^/

(.*)$ https://%{HTTP_HOST}/

$1 [L,R]

Example:


# Force Nagios to use SSL
RewriteEngine on
RewriteCond   %{SERVER_PORT}  !^443$
RewriteRule ^/nagios(.*)$ https://%{HTTP_HOST}/nagios$1 [L,R]