Add IP-based rules (#14963)

config/initializers/rack_attack.rb

@@ -42,6 +42,10 @@ class Rack::Attack
     req.remote_ip == '127.0.0.1' || req.remote_ip == '::1'
   end
 
+  Rack::Attack.blocklist('deny from blocklist') do |req|
+    IpBlock.blocked?(req.remote_ip)
+  end
+
   throttle('throttle_authenticated_api', limit: 300, period: 5.minutes) do |req|
     req.authenticated_user_id if req.api_request?
   end