How do I "batch" secure all pages on web site?

I’m building a website for a client that in which privacy about the content before we launch is a big issue. I put the website on a obscure sub domain and the homepage is a login page...nothing else. But all the other pages are not secure...in other words, it would be really bad if someone (like Google) to come upon these pages and list in Search Results. So how do I secure every page without having to go and secure every page individually? Is there a way to do so like a batch process? And then when we launch the site, do the same to remove all the security from each page?

By the way, I’m using MODx .0.9.6

Thanks!

The easiest way would be before launch, just keep the site in offline mode, and you can still view it with a manager account in the Admin role.

Cool...I see. I’ve logged into the manager and while logged in, I opened a new tab with Fire Fox and then it allows me to continue browsing the site as if it were online (while it’s offline to everyone without a manager account). Cool...

Thanks!