How to prevent unwanted routes in nginx being routed to my rails app

Question

How to prevent unwanted routes in nginx, for requests routed to my rails application.

Started GET "/w00tw00t.at.blackhats.romanian.anti-sec:)" for 125.218.121.25 at 2014-01-13 02:04:28 +0000
Processing by RoutingErrorsController#routing_error as
  Parameters: {"path"=>"w00tw00t.at.blackhats.romanian"}
Completed   in 0.8ms

Answer 1

Use the location directive:

location ~ /myUnavailableRoute {
    deny all;
}

You can use regular expressions to block all routes matching a certain pattern (or to white-list only allowed routes if that makes more sense). There are some good examples in the nginx docs: http://nginx.org/en/docs/beginners_guide.html