Description
Lets you set display, access denied, redirect or programmatic accessing for direct access to nodes.
However, note that includes both /node/xxx and the node alias, i.e. you can't just use it to restrict numeric URLs, the human friendly ones will get blocked too - so restrict_node_page_view might be more appropriate.
There's a series of submodules (such as rh_node) and without enabling them you won't see any options in the UI.
(look for the Rabbit Hole tab when editing nodes, for example).