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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | MODULE TYPES PROVIDED | RETURN VALUES | FILES | SEE ALSO | AUTHORS | COLOPHON |
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PAM_ACCESS(8) Linux-PAM Manual PAM_ACCESS(8)
pam_access - PAM module for logdaemon style login access control
pam_access.so [debug] [nodefgroup] [noaudit] [accessfile=file]
[fieldsep=sep] [listsep=sep]
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.).
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.
All module types (auth, account, password and session) are
provided.
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.
/etc/security/access.conf
Default configuration file
access.conf(5), pam.d(5), pam(8).
The logdaemon style login access control scheme was designed and
implemented by Wietse Venema. The pam_access PAM module was
developed by Alexei Nogin <[email protected]>. The IPv6
support and the network(address) / netmask feature was developed
and provided by Mike Becher <[email protected]>.
This page is part of the linux-pam (Pluggable Authentication
Modules for Linux) project. Information about the project can be
found at ⟨http://www.linux-pam.org/⟩. If you have a bug report
for this manual page, see ⟨//www.linux-pam.org/⟩. This page was
obtained from the project's upstream Git repository
⟨https://github.com/linux-pam/linux-pam.git⟩ on 2023-12-22. (At
that time, the date of the most recent commit that was found in
the repository was 2023-12-18.) 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
[email protected]
Linux-PAM Manual 12/22/2023 PAM_ACCESS(8)
Pages that refer to this page: access.conf(5)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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