pam_access(8) — Linux manual page


PAM_ACCESS(8)               Linux-PAM Manual               PAM_ACCESS(8)

NAME         top

       pam_access - PAM module for logdaemon style login access control

SYNOPSIS         top [debug] [nodefgroup] [noaudit] [accessfile=file]
                     [fieldsep=sep] [listsep=sep]

DESCRIPTION         top

       The pam_access PAM module is mainly for access management. It
       provides logdaemon style login access control based on login
       names, host or domain names, internet addresses or network
       numbers, or on terminal line names, X $DISPLAY values, or PAM
       service names in case of non-networked logins.

       By default rules for access management are taken from config file
       /etc/security/access.conf if you don't specify another file.

       If Linux PAM is compiled with audit support the module will
       report when it denies access based on origin (host, tty, etc.).

OPTIONS         top

           Indicate an alternative access.conf style configuration file
           to override the default. This can be useful when different
           services need different access lists.

           A lot of debug information is printed with syslog(3).

           Do not report logins from disallowed hosts and ttys to the
           audit subsystem.

           This option modifies the field separator character that
           pam_access will recognize when parsing the access
           configuration file. For example: fieldsep=| will cause the
           default `:' character to be treated as part of a field value
           and `|' becomes the field separator. Doing this may be useful
           in conjunction with a system that wants to use pam_access
           with X based applications, since the PAM_TTY item is likely
           to be of the form "hostname:0" which includes a `:' character
           in its value. But you should not need this.

           This option modifies the list separator character that
           pam_access will recognize when parsing the access
           configuration file. For example: listsep=, will cause the
           default ` ' (space) and `\t' (tab) characters to be treated
           as part of a list element value and `,' becomes the only list
           element separator. Doing this may be useful on a system with
           group information obtained from a Windows domain, where the
           default built-in groups "Domain Users", "Domain Admins"
           contain a space.

           User tokens which are not enclosed in parentheses will not be
           matched against the group database. The backwards compatible
           default is to try the group database match even for tokens
           not enclosed in parentheses.


       All module types (auth, account, password and session) are

RETURN VALUES         top

           Access was granted.

           Access was not granted.

           pam_setcred was called which does nothing.

           Not all relevant data or options could be gotten.

           The user is not known to the system.

FILES         top

           Default configuration file

SEE ALSO         top

       access.conf(5), pam.d(5), pam(8).

AUTHORS         top

       The logdaemon style login access control scheme was designed and
       implemented by Wietse Venema. The pam_access PAM module was
       developed by Alexei Nogin <>. The IPv6
       support and the network(address) / netmask feature was developed
       and provided by Mike Becher <>.

COLOPHON         top

       This page is part of the linux-pam (Pluggable Authentication
       Modules for Linux) project.  Information about the project can be
       found at ⟨⟩.  If you have a bug report
       for this manual page, see ⟨//⟩.  This page was
       obtained from the tarball Linux-PAM-1.3.0.tar.bz2 fetched from
       ⟨⟩ on 2021-08-27.  If you
       discover any rendering problems in this HTML version of the page,
       or you believe there is a better or more up-to-date source for
       the page, or you have corrections or improvements to the
       information in this COLOPHON (which is not part of the original
       manual page), send a mail to

Linux-PAM Manual               04/01/2016                  PAM_ACCESS(8)

Pages that refer to this page: access.conf(5)