OmniAuth is a flexible authentication system utilizing Rack middleware
...One strategy, called Developer, is included with OmniAuth and provides a completely insecure, non-production-usable strategy that directly prompts a user for authentication information and then passes it straight through. You can use it as a placeholder when you start development and easily swap in other strategies later.
...Rack::Attack lets you easily decide when to allow, block and throttle based on properties of the request. Rack middleware for blocking & throttling abusive requests. Tackling each curious anomaly that threatens your site’s reliability saps developer productivity and happiness. Rack::Attack lets you throttle abusive requests with just a few lines of code. For the security of our users, we have a stricter throttle for login attempts. This makes it very time consuming for attackers to guess users’ passwords. We also use the IPCat ruby library to detect requests from well-known datacenters. ...
The Registry Server (jUDDI) offers a mechanism for humans or software applications to advertise and discover Web services. The Java Web Services Developer Pack (Java WSDP) Registry Server implements Version 2 of the Universal Description, Discovery and I