Pluggable authentication modules (UNIX or Linux)

A Pluggable Authentication Module (PAM) is a well-defined framework for supporting different authentication modules that were originally developed by Sun Microsystems. PAM is supported in both 32- and 64-bit modes on Solaris, Linux, HP-UX and AIX®.

System administrators can use PAM to implement different authentication mechanisms for different applications. For example, the requirements of a system like the UNIX login program might be different from an application that accesses sensitive information from a database. PAM allows for many such scenarios in a single computer because the authentication services are attached at the application level.

System administrators can use PAM to enable an application to select the authentication as required. You can stack many modules one after another to enable the application to be authenticated in multiple ways before the application grants access. PAM provides a set of APIs to support authentication, account management, session management, and password management.

The system administrator can enable or disable the use of PAM. By default, the database server uses the traditional Informix® authentication mechanism (which is based on the BSD rhosts mechanism) to avoid forcing major changes on users.

To use PAM with HCL Informix:

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