Advanced Single Server Edition supports only the use of the local operating system user registry. It does not support LTPA.
WebSphere Application Server authenticates users against either:
/etc/passwd
file on a UNIX system). If you choose
to authenticate against the local user registry, WebSphere
Application Server ensures that the principal/password combination
provided by the user matches a valid combination in the user registry.
WebSphere Application Server supports certain directory services. See the product prerequisites for a list.
A Custom User Registry can be used in combination with LTPA.
If you choose the LTPA authentication mechanism, authentication is delegated to the directory service. The actual authentication process can take one of several forms. For example, if the user can provide only an identifier and a password, authentication is performed by verifying these against the LDAP registry. If the user has an LTPA certificate (or token), then authentication is performed by validating the certificate. If the user has a certificate and is able to set up an secure communication channel (SSL) between the Web client and server, the user is trusted to be the owner of the certificate, and user information in the certificate is mapped to the LDAP registry.