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PAM_ACCESS(8)                            Linux-PAM Manual                           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 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
       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 AT nogin.ru>.
       The IPv6 support and the network(address) / netmask feature was developed and provided by
       Mike Becher <mike.becher AT lrz-muenchen.de>.

Linux-PAM Manual                            06/08/2020                              PAM_ACCESS(8)

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