我在Heroku上有一个正在生产的Rails 5应用程序。我最近注意到服务器负载特别高，进一步调查看起来好像都是来自一群垃圾邮件机器人。
这些机器人正在向朋友发送电子邮件。我在展示页面上的表单，可供注销用户使用。我之后才将表单提供给已登录和已验证的用户。我还删除了机器人在数据库中定位的具体记录，但是这并没有做任何事情来阻止机器人击中路线。 （他们似乎只针对特定记录......）
然后我安装了rack-attack gem以尝试限制对此特定路由（以及sign_up路径）的请求，但我遇到的问题是这些垃圾邮件请求来自不同的ip地址每次，机架攻击gem只限制来自单个ip的请求。
任何人都可以提供有关如何防止这些机器人访问我的网站的任何帮助吗？
这是从Heroku日志打印出来的：
2016-11-26T08:01:22.784341+00:00 heroku[router]: at=info method=POST path="/jobs/389-commercial-vehicle-technician-northside-truck-van-york-mercedes-benz-uk-ltd/email_to_friend" host=www.example.com request_id=02689424-de9c-4a25-96c8-8f510a587836 fwd="203.160.52.159" dyno=web.1 connect=1ms service=11ms status=404 bytes=1812
2016-11-26T08:01:22.757585+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] Started POST "/jobs/389-commercial-vehicle-technician-northside-truck-van-york-mercedes-benz-uk-ltd/email_to_friend" for 203.160.52.159 at 2016-11-26 08:01:22 +0000
2016-11-26T08:01:22.759320+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836]
2016-11-26T08:01:22.759371+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] ActionController::RoutingError (No route matches [POST] "/jobs/389-commercial-vehicle-technician-northside-truck-van-york-mercedes-benz-uk-ltd/email_to_friend"):
2016-11-26T08:01:22.759421+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836]
2016-11-26T08:01:22.759493+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/gems/actionpack-5.0.0.1/lib/action_dispatch/middleware/debug_exceptions.rb:53:in `call'
2016-11-26T08:01:22.759535+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/gems/actionpack-5.0.0.1/lib/action_dispatch/middleware/show_exceptions.rb:31:in `call'
2016-11-26T08:01:22.759575+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/gems/railties-5.0.0.1/lib/rails/rack/logger.rb:36:in `call_app'
2016-11-26T08:01:22.759639+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/gems/railties-5.0.0.1/lib/rails/rack/logger.rb:24:in `block in call'
2016-11-26T08:01:22.759726+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.0.1/lib/active_support/tagged_logging.rb:26:in `tagged'
2016-11-26T08:01:22.759685+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.0.1/lib/active_support/tagged_logging.rb:70:in `block in tagged'
2016-11-26T08:01:22.759766+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.0.1/lib/active_support/tagged_logging.rb:70:in `tagged'
2016-11-26T08:01:22.759905+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/gems/railties-5.0.0.1/lib/rails/rack/logger.rb:24:in `call'
2016-11-26T08:01:22.759944+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/gems/actionpack-5.0.0.1/lib/action_dispatch/middleware/request_id.rb:24:in `call'
2016-11-26T08:01:22.760009+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/gems/rack-2.0.1/lib/rack/method_override.rb:22:in `call'
2016-11-26T08:01:22.760265+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/gems/rack-2.0.1/lib/rack/runtime.rb:22:in `call'
2016-11-26T08:01:22.760333+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.0.1/lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
2016-11-26T08:01:22.760365+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/gems/actionpack-5.0.0.1/lib/action_dispatch/middleware/executor.rb:12:in `call'
2016-11-26T08:01:22.760394+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/gems/actionpack-5.0.0.1/lib/action_dispatch/middleware/static.rb:136:in `call'
2016-11-26T08:01:22.760422+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/bundler/gems/heroku-deflater-60d92ba0f8ae/lib/heroku-deflater/skip_binary.rb:19:in `call'
2016-11-26T08:01:22.760478+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/gems/rack-2.0.1/lib/rack/deflater.rb:35:in `call'
2016-11-26T08:01:22.760522+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/bundler/gems/heroku-deflater-60d92ba0f8ae/lib/heroku-deflater/serve_zipped_assets.rb:50:in `call'
2016-11-26T08:01:22.760552+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/gems/rack-2.0.1/lib/rack/sendfile.rb:111:in `call'
2016-11-26T08:01:22.760581+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/gems/actionpack-5.0.0.1/lib/action_dispatch/middleware/ssl.rb:83:in `call'
2016-11-26T08:01:22.760610+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/gems/railties-5.0.0.1/lib/rails/engine.rb:522:in `call'
2016-11-26T08:01:22.760650+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/gems/puma-3.6.0/lib/puma/configuration.rb:225:in `call'
2016-11-26T08:01:22.760699+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/gems/puma-3.6.0/lib/puma/server.rb:578:in `handle_request'
2016-11-26T08:01:22.760741+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/gems/puma-3.6.0/lib/puma/server.rb:415:in `process_client'
2016-11-26T08:01:22.760782+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/gems/puma-3.6.0/lib/puma/server.rb:275:in `block in run'
2016-11-26T08:01:22.760849+00:00 app[web.1]: [02689424-de9c-4a25-96c8-8f510a587836] vendor/bundle/ruby/2.3.0/gems/puma-3.6.0/lib/puma/thread_pool.rb:116:in `block in spawn_thread'
答案 0 :(得分：1)
您可以将ReCAPTCHA添加到表单中。这可以过滤掉大多数机器人。
This is one of ruby gems to add reCaptcha
然而，根据link，存在一些缺点。接受的答案有很好的描述，你可以做什么。