few days back when one of my teammate was working on an opencart shop.Here he wanted to hide  OpenCart webshop from the public until I finished it. Somewhere in the OpenCart Admin panel there was an option to enable / disable the entire shop.Unfortunately he do not find this option anymore.Then we did some google search and finally found it.To know how we did it please follow below steps

  1. Login in to admin panel.
  2. Go to System > Settings
  3. Click on Edit button of your store.
  4. Select Server tab.
  5. Set Maintenance Mode: option as Yes.

This setting prevents customers from browsing your store. They will instead see a maintenance message. If logged in as admin, you will see the store as normal.

That’s it.