I have observed the problem when using redirect rules
Here is the redirect rules. It opens the page on live .(http://example.com/mypage/profile/)
On stage redirected to login page http://example.com/mypage/profile/?stage=Stage

Director::addRules(100, array(
    'mypage/profile//$Action/$ID' => 'ProfilePage_Controller',
    'mypage/profile//' => 'ProfilePage_Controller',
    'myprofile' => 'ProfilePage_Controller',
));

I traced the code where it gets Permission Failure

if(!$this->dataRecord->canViewStage(Versioned::current_archived_date() ? 'Stage' : Versioned::current_stage())) {
Line:122 cms/code/controllers/ContentController.php

Do I need to set permission to view on Stage?

Thanks
B L Praveen

There's a few ways to get around this.

One is to add a ?stage=live to URL. Ugly but it will work.

Another is to bypass the ContentController init() function, this is handy if you have functions in your Page_Controller you want to leverage:

	/**
	 * Bypass the staging permission check
	 */
	public function init() {
		Controller::init();
	}

The last way, which I prefer (as outlined here: http://www.silverstripe.org/community/forums/general-questions/reply/66997) is to extend the Controller, instead of ContentController:

class Whatever_Controller extends Controller {

Edit: if you want to add a permission check, you can by putting this in the controller function (or in the init):

		if (!Permission::checkMember(Member::currentUser(), "CMS_ACCESS_whatever")) {
			header("HTTP/1.0 403 Forbidden");
			die('You do not have permission to use the live chat module');
		}