pam_group(8) [freebsd man page]

PAM_GROUP(8)						    BSD System Manager's Manual 					      PAM_GROUP(8)

NAME

     pam_group -- Group PAM module

SYNOPSIS

     [service-name] module-type control-flag pam_group [arguments]

DESCRIPTION

     The group service module for PAM accepts or rejects users based on their membership in a particular file group.  pam_group provides function-
     ality for two PAM categories: authentication and account management.  In terms of the module-type parameter, they are the ``auth'' and
     ``account'' features.

     The following options may be passed to the pam_group module:

     deny	Reverse the meaning of the test, i.e., reject the applicant if and only if he or she is a member of the specified group.  This can
		be useful to exclude certain groups of users from certain services.

     fail_safe	If the specified group does not exist, or has no members, act as if it does exist and the applicant is a member.

     group=groupname
		Specify the name of the group to check.  The default is ``wheel''.

     luser	Accept or reject based on the target user's group membership.

     root_only	Skip this module entirely if the target account is not the superuser account.

     ruser	Accept or reject based on the supplicant's group membership.  This is the default.

     Note that the luser and ruser options are mutually exclusive, and that pam_group will fail if both are specified.

SEE ALSO

     pam.conf(5), pam(8)

AUTHORS

     The pam_group module and this manual page were developed for the FreeBSD Project by ThinkSec AS and NAI Labs, the Security Research Division
     of Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 (``CBOSS''), as part of the DARPA CHATS research program.

BSD
								   July 19, 2014							       BSD

PAM_GROUP(8)							 Linux-PAM Manual						      PAM_GROUP(8)

NAME

       pam_group - PAM module for group access

SYNOPSIS

       pam_group.so

DESCRIPTION

       The pam_group PAM module does not authenticate the user, but instead it grants group memberships (in the credential setting phase of the
       authentication module) to the user. Such memberships are based on the service they are applying for.

       By default rules for group memberships are taken from config file /etc/security/group.conf.

       This module's usefulness relies on the file-systems accessible to the user. The point being that once granted the membership of a group,
       the user may attempt to create a setgid binary with a restricted group ownership. Later, when the user is not given membership to this
       group, they can recover group membership with the precompiled binary. The reason that the file-systems that the user has access to are so
       significant, is the fact that when a system is mounted nosuid the user is unable to create or execute such a binary file. For this module
       to provide any level of security, all file-systems that the user has write access to should be mounted nosuid.

       The pam_group module functions in parallel with the /etc/group file. If the user is granted any groups based on the behavior of this
       module, they are granted in addition to those entries /etc/group (or equivalent).

OPTIONS

       This module does not recognise any options.

MODULE TYPES PROVIDED

       Only the auth module type is provided.

RETURN VALUES

       PAM_SUCCESS
	   group membership was granted.

       PAM_ABORT
	   Not all relevant data could be gotten.

       PAM_BUF_ERR
	   Memory buffer error.

       PAM_CRED_ERR
	   Group membership was not granted.

       PAM_IGNORE

	   pam_sm_authenticate was called which does nothing.

       PAM_USER_UNKNOWN
	   The user is not known to the system.

FILES

       /etc/security/group.conf
	   Default configuration file

SEE ALSO

       group.conf(5), pam.d(5), pam(7).

AUTHORS

       pam_group was written by Andrew G. Morgan <morgan@kernel.org>.

Linux-PAM Manual						    06/04/2011							      PAM_GROUP(8)