NAME
pam_access - PAM module for logdaemon style login access controlSYNOPSIS
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.confIndicate 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_SUCCESSAccess 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.confDefault 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 <[email protected]>. The IPv6 support and the network(address) / netmask feature was developed and provided by Mike Becher <[email protected]>.| 09/03/2021 | Linux-PAM Manual |