Sun Java System Application Server Platform Edition 8.1 2005Q2 Update 2 Upgrade and Migration Guide

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## Authenticating a Client in Sun Java System Application Server 8.1

The authentication is done based on JAAS (Java Authorization and Authentication System API). If a client does not provide a `CallbackHandler`, then the default `CallbackHandler`, called the `LoginModule`, is used by the ACC to obtain the authentication data.

For detailed instructions on using JAAS for authentication, see Chapter 9, Configuring Security, in Sun Java System Application Server Platform Edition 8.1 2005Q2 Update 2 Administration Guide.

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