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Form-based authentication lets developers customize the authentication user interface. While the J2EE specifications provide a standard way to specify the login page URL access requirements, there still is container-specific configuration to specify how to read usernames and passwords from a security datastore. This is one reason that the platform uses Acegi Security. The Acegi Security class that processes form posts is AuthenticationProcessingFilter.

Login Page

Below are some screenshots of the login page in different states. To customize this page, including changing strings, see Customizing the Login Page.

Panel
bgColor#FFFFFF
titleLogin Page

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Panel
bgColor#FFFFFF
titleLogin Form After Bad Credentials Submitted


This is the message that a user will get if a username and password combination is unrecognized.

Panel
bgColor#FFFFFF
titleLogin Form After Generic Security Error


This is the message that a user will get if there is a generic security error, such as the security datastore being unavailable. The root cause will be in the log.

Panel
bgColor#FFFFFF
titleLogin Form While Logged In

Panel
bgColor#FFFFFF
titleLogin Form After Session Re-Use Detected

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This is the message that a user will get if he or she attempts to login again without first logging out. See HttpSessionReuseDetectionFilter.

Logout Page

Basic Authentication

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