i'm playing with a side where the main content is private. only a page showing a message and the login form in the sidebar should be visible. when logged in (and only then), a "Recent Articles" is showing and all is fine… until i add either an "Archive" or "Calendar" to the sidebar. Then they also show up when i'm logged out. The "Archive" only with their title but the "Calendar" completely incl. marked day when posts exist.
how can i change the behaviour of all items placed in the sidebar that they only show up when i'm logged in?
any hints are greatly appreciated.