This Blog is intended to collect information of my various Intrests,pen my opinion on the information gathered and not intended to educate any one of the information posted,but are most welcome to share there view on them
Tuesday, May 17, 2011
Pluggable Authentication Modules
PAM stands for Pluggable Authentication Modules. PAM is a library, used to control the function of various applications that have the capability to use the PAM libraries. PAM is based on a series of library modules, some of which depend on configuration files. Locations of PAM configuration files and library modules are:
* All PAM applications are configured in the directory “/etc/pam.d” or in a file “/etc/pam.conf”.
* The library modules are normally stored in the directory “/lib/security”.
* The configuration files are located in the directory “/etc/security”.
To configure PAM, on systems already set up for it, you would need to edit the files for the service you want to modify in the “/etc/pam.d” directory, and modify the appropriate configuration file in the directory “/etc/security”. This page will explain how to set up the configuration files and how to configure the modules so applications can use them. The PAM configuration files
PAM is controlled a main configuration file( /etc/pam.conf) or control directory (/etc/pam.d). Some PAM module’s behavior is controlled with configuration files (in /etc/security)as listed below:
* access.conf – Login access control. Used for the pam_access.so library.
* group.conf – Group membership control. Used for the pam_group.so library.
* limits.conf – Set system resource limits. Used for the pam_limits.so library.
* pam_env – Control ability to change environment variables. Used for the pam_env.so library.
* time – Allows time restrictions to be applied to services and user privileges. Used for the pam_time.so library.