Configuring Authentication. Least privilege is the principle that users should have the fewest privileges necessary to perform their duties and no more. As applied to middle tier applications, this means that the middle tier should not have more privileges than it needs. Oracle Database enables you to limit the middle tier such that it can connect only on behalf of certain database users, using only specific database roles. You can limit the privilege of the middle tier to connect on behalf of an enterprise user, stored in an LDAP directory, by granting to the middle tier the privilege to connect as the mapped database user. For instance, if the enterprise user is mapped to the APPUSER schema, then you must at least grant to the middle tier the ability to connect on behalf of APPUSER. Otherwise, attempts to create a session for the enterprise user will fail. However, you cannot limit the ability of the middle tier to connect on behalf of enterprise users. For example, suppose that user Sarah wants to connect to the database through a middle tier, appsrv (which is also a database user). Sarah has multiple roles, but it is desirable to restrict the middle tier to use only the clerk role on her behalf. An administrator can grant permission for appsrv to initiate connections on behalf of Sarah using her clerk role only by using the following SQL statement. ALTER USER sarah GRANT CONNECT THROUGH appsrv WITH ROLE clerk. By default, the middle tier cannot create connections for any client. The permission must be granted for each user. To enable appsrv to use all of the roles granted to the client Sarah, you can use the following statement. ALTER USER sarah GRANT CONNECT THROUGH appsrv. Each time a middle tier initiates an OCI, JDBC/OCI, or Thin driver session for another database user, the database verifies that the middle tier is authorized to connect for that user by using the role specified. Note: Instead of using default roles, create your own roles and assign only necessary privileges to them. Introduction. This is Part 1 of Form Authentication in MVC 5. In this article we will learn what Authentication and Authorization is with a small demo of what we will. Creating your own roles enables you to control the privileges granted by them and protects you if Oracle Database changes or removes default roles. For example, the CONNECT role now has only the CREATE SESSION privilege, the one most directly needed when connecting to a database. However, CONNECT formerly provided several additional privileges, often not needed or appropriate for most users. Extra privileges can endanger the security of your database and applications. HOW TO user ASP.NET MVC with Forms Authentication and Active Directory.These have now been removed from CONNECT. See Configuring Privilege and Role Authorization, for more information about roles. ![]() ![]()
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