PAM_ACCESS(8)             (06/08/2020)              PAM_ACCESS(8)

     NAME
          pam_access - PAM module for logdaemon style login access
          control

     SYNOPSIS
          pam_access.so [debug] [nodefgroup] [noaudit]
                        [accessfile=file] [fieldsep=sep] [listsep=sep]

     DESCRIPTION
          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. Then individual *.conf files from the
          /etc/security/access.d/ directory are read. The files are
          parsed one after another in the order of the system locale.
          The effect of the individual files is the same as if all the
          files were concatenated together in the order of parsing.
          This means that once a pattern is matched in some file no
          further files are parsed. If a config file is explicitly
          specified with the accessfile option the files in the above
          directory are not parsed.

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

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

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

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

          fieldsep=separators
              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

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              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.

          listsep=separators
              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.

          nodefgroup
              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.

     MODULE TYPES PROVIDED
          All module types (auth, account, password and session) are
          provided.

     RETURN VALUES
          PAM_SUCCESS
              Access was granted.

          PAM_PERM_DENIED
              Access was not granted.

          PAM_IGNORE
              pam_setcred was called which does nothing.

          PAM_ABORT
              Not all relevant data or options could be gotten.

          PAM_USER_UNKNOWN
              The user is not known to the system.

     FILES
          /etc/security/access.conf
              Default configuration file

     SEE ALSO
          access.conf(5), pam.d(5), pam(7).

     AUTHORS

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          The logdaemon style login access control scheme was designed
          and implemented by Wietse Venema. The pam_access PAM module
          was developed by Alexei Nogin <alexei@nogin.dnttm.ru>. The
          IPv6 support and the network(address) / netmask feature was
          developed and provided by Mike Becher
          <mike.becher@lrz-muenchen.de>.

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