pam_wheel — Only permit root access to members of group wheel

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DESCRIPTION

The pam_wheel PAM module is used to enforce the so-called wheel group. By
default it permits access to the target user if the applicant user is a member
of the wheel group. If no group with this name exist, the module is using the
group with the group-ID 0.

OPTIONS

debug

    Print debug information.

deny

    Reverse the sense of the auth operation: if the user is trying to get UID 0
    access and is a member of the wheel group (or the group of the group
    option), deny access. Conversely, if the user is not in the group, return
    PAM_IGNORE (unless trust was also specified, in which case we return
    PAM_SUCCESS).

group=name

    Instead of checking the wheel or GID 0 groups, use the name group to
    perform the authentication.

root_only

    The check for wheel membership is done only when the target user UID is 0.

trust

    The pam_wheel module will return PAM_SUCCESS instead of PAM_IGNORE if the
    user is a member of the wheel group (thus with a little play stacking the
    modules the wheel members may be able to su to root without being prompted
    for a passwd).

EXAMPLES

The root account gains access by default (rootok), only wheel members can
become root (wheel) but Unix authenticate non-root applicants.

su      auth     sufficient     pam_rootok.so
su      auth     required       pam_wheel.so
su      auth     required       pam_unix.so


AUTHOR

pam_wheel was written by Cristian Gafton <gafton@redhat.com>.