diff --git a/drupalorg/drupalorg.views_default.inc b/drupalorg/drupalorg.views_default.inc
index 6edf7d8..fca7b69 100644
--- a/drupalorg/drupalorg.views_default.inc
+++ b/drupalorg/drupalorg.views_default.inc
@@ -81,6 +81,28 @@ function _drupalorg_views_default_views_alter(&$views) {
     }
   }
 
+  // Both of the "all projects" views are currently very expensive to run
+  // and can easily take the db servers down if a crawler attempts to crawl
+  // them.
+  // Therefore, do not make them available to anonymous users.
+  // This does not affect the normal "single project" searches.
+  $auth_only_views = array(
+    'project_issue_all_projects',
+    'project_issue_search_all',
+  );
+  $access = array(
+    'type' => 'role',
+    'role' => array(
+      '2' => 2,
+    ),
+  );
+  foreach ($auth_only_views as $name) {
+    if (isset($views[$name])) {
+      $views[$name]->set_display('default');
+      $views[$name]->display_handler->override_option('access', $access);
+    }
+  }
+
   // Add block caching to the 'Recent issues' block for each project.
   $name = 'project_issue_project';
   if (isset($views[$name])) {