HowTo: Create a ror project that has Email/Password authentication?

Is this possible out of the box with Rails? or is an add-on or hack requi开发者_运维百科red?

It isn't possible out of the box, but you can install one gem and get any authentication system you want.

1. RESTful authentication;
2. Authlogic;
3. Devise.

And so forth. There are many solutions to solve your task. Just choose one.