Suppress ActionController::RoutingError in logs

My rails log get chock a block with things like <<<<<<<<<<<< ActionController::RoutingError (No route matches "/admin/Y- ivrrecording.php" with {:method=>:get}): ... ActionController::RoutingError (No route matches "/manager/html" with {:method=>:get}): .. ActionController::RoutingError (No route matches "/webdav/test" with {:method=>:get}): ... ActionController::RoutingError (No route matches "/ javascripts/).html(" with {:method=>:get}): <<<<<<<<<<< These are just spurious attempts to access the server and nothing to do with my rails app.

They are taking up more log space and processor time than I would like.

Any advice on how to either suppress them from the logs or even better head them off before they hit rails would be appreciated.

I have seen some apache config in various places to attempt stuff like this but it is pretty scary when you are not sure if it is right...

Cheers George