In a default configuration, pass-through authentication is accomplished by sending the user ID and password only. These two attributes are configured in the AuthnProperties element in the resource object’s XML as w2k_user and w2k_password. Without a domain specification, the gateway searches all known domains and tries to authenticate the user in the domain that contains the user.
In a trusted multi-domain environment, there can be two possible situations:
All domains contain a synchronized user/password combination
The user/password combination is domain dependent.
When the user/password combination is synchronized, configure your Active Directory resources so that they are common resources. See Business Administrator's Guide for more information about setting up common resources.
If the user/password combination is domain-dependent, and if users can be expected to know the domain information, you can allow users to enter the domain information on the login screen. This option can be used in combination with common resources.
To allow the user to enter the domain on the login page, add the following property to the <AuthnProperties> element in the resource object’s XML:
<AuthnProperty name=’w2k_domain’ displayName=’Domain:’ formFieldType=’text’ dataSource=’user’ doNotMap=’true’/>
In an environment with multiple trusted domains and Active Directory forests, the authentication can fail using any of these configurations because the Global Catalog does not contain cross-forest information. If a user supplies a wrong password, it could also lead to account lockout in the user’s domain if the number of domains is greater than the lockout threshold.
User management across forests is only possible when multiple gateways, one for each forest, are deployed. In this case, you can configure the adapters to use a predefined domain for authentication per adapter without requiring the user to specify a domain. To accomplish this, add the following authentication property to the <AuthnProperties> element in the resource object’s XML:
<AuthnProperty name=’w2k_domain’ dataSource=’resource attribute’ value=’MyDomainName’/>
Replace MyDomainName with the domain that will authenticate users.
Login failures will occur in domains if the user exists in the domain and the password is not synchronized.
It is not possible to use multiple data sources for the domain information in one Login Module Group.