This gem provides a rack middleware that will enable Sentry to see the real IP of the user causing an error.

You need this gem, if there is a proxy between the application server and the user.

Include the gem in your application:

gem 'sentry_real_ip', '~> 1.1'

Depending on your framework, you may also need to tell your application to use the middleware of this gem. For Rails applications, it just works, and you are done by adding it to the Gemfile.

For other frameworks (e.g. Sinatra) you need to explicitly use the middleware, e.g. in your config.ru, you can put this before the call to run:

use Raven::Rack # you will usually already have this line
use SentryRealIp::Middleware