Enforce HTTP to HTTPS but private IP

edit httpd.conf 

<VirtualHost _default_:80>

# If mod_rewrite is present, it takes precedence over mod_alias

# and it is necessary to rewrite the request to https.

  <IfModule mod_rewrite.c>

     RewriteEngine on

     RewriteCond %{REMOTE_ADDR} !^172.25.*

     RewriteRule (.*) https://%{HTTP_HOST}$1

  </IfModule>

# Otherwise use mod_alias to redirect.

#  Redirect / https://%{HTTP_HOST}/

</VirtualHost>