PAM(8)                  NetBSD System Manager's Manual                  PAM(8)


NAME
pam -- Pluggable Authentication Modules framework
DESCRIPTION
The Pluggable Authentication Modules (PAM) framework is a system of libraries that perform authentication tasks for services and applica- tions. Applications that use the PAM API may have their authentication behavior configured by the system administrator though the use of the service's PAM configuration file. PAM modules provide four classes of functionality: account Account verification services such as password expiration and access control. auth Authentication services. This usually takes the form of a challenge-response conversation. However, PAM can also sup- port, with appropriate hardware support, biometric devices, smart-cards, and so forth. password Password (or, more generally, authentication token) change and update services. session Session management services. These are tasks that are per- formed before access to a service is granted and after access to a service is withdrawn. These may include updating activity logs or setting up and tearing down credential forwarding agents. A primary feature of PAM is the notion of ``stacking'' different modules together to form a processing chain for the task. This allows fairly precise control over how a particular authentication task is performed, and under what conditions. PAM module configurations may also inherit stacks from other module configurations, providing some degree of cen- tralized administration.
SEE ALSO
login(1), passwd(1), su(1), pam(3), pam.conf(5), pam_chroot(8), pam_deny(8), pam_echo(8), pam_exec(8), pam_ftpusers(8), pam_group(8), pam_guest(8), pam_krb5(8), pam_ksu(8), pam_lastlog(8), pam_login_access(8), pam_nologin(8), pam_permit(8), pam_radius(8), pam_rhosts(8), pam_rootok(8), pam_securetty(8), pam_self(8), pam_skey(8), pam_ssh(8), pam_unix(8)
HISTORY
The Pluggable Authentication Module framework was originally developed by SunSoft, described in DCE/OSF-RFC 86.0, and first deployed in Solaris 2.6. It was later incorporated into the X/Open Single Sign-On Service (XSSO) Pluggable Authentication Modules specifiation. The Pluggable Authentication Module framework first appeared in NetBSD 3.0. NetBSD 6.0.1 February 28, 2005 NetBSD 6.0.1

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