NAME¶
faillock.conf - pam_faillock configuration file
DESCRIPTION¶
faillock.conf provides a way to configure the default
settings for locking the user after multiple failed authentication attempts.
This file is read by the pam_faillock module and is the preferred
method over configuring pam_faillock directly.
The file has a very simple name = value format with
possible comments starting with # character. The whitespace at the
beginning of line, end of line, and around the = sign is ignored.
OPTIONS¶
dir=/path/to/tally-directory
The directory where the user files with the failure
records are kept. The default is /var/run/faillock.
Note: These files will disappear after reboot on systems
configured with directory /var/run/faillock mounted on virtual memory.
audit
Will log the user name into the system log if the user is
not found.
silent
Don't print informative messages to the user. Please note
that when this option is not used there will be difference in the
authentication behavior for users which exist on the system and non-existing
users.
no_log_info
Don't log informative messages via
syslog(3).
local_users_only
Only track failed user authentications attempts for local
users in /etc/passwd and ignore centralized (AD, IdM, LDAP, etc.) users. The
faillock(8) command will also no longer track user failed
authentication attempts. Enabling this option will prevent a double-lockout
scenario where a user is locked out locally and in the centralized
mechanism.
nodelay
Don't enforce a delay after authentication
failures.
deny=n
Deny access if the number of consecutive authentication
failures for this user during the recent interval exceeds n. The
default is 3.
fail_interval=n
The length of the interval during which the consecutive
authentication failures must happen for the user account lock out is n
seconds. The default is 900 (15 minutes).
unlock_time=n
The access will be re-enabled after
n seconds
after the lock out. The value 0 has the same meaning as value
never -
the access will not be re-enabled without resetting the faillock entries by
the
faillock(8) command. The default is 600 (10 minutes).
Note that the default directory that pam_faillock uses is
usually cleared on system boot so the access will be also re-enabled after
system reboot. If that is undesirable a different tally directory must be
set with the dir option.
Also note that it is usually undesirable to permanently lock out
users as they can become easily a target of denial of service attack unless
the usernames are random and kept secret to potential attackers.
even_deny_root
Root account can become locked as well as regular
accounts.
root_unlock_time=n
This option implies even_deny_root option. Allow
access after n seconds to root account after the account is locked. In
case the option is not specified the value is the same as of the
unlock_time option.
admin_group=name
If a group name is specified with this option, members of
the group will be handled by this module the same as the root account (the
options even_deny_root and root_unlock_time will apply to them.
By default the option is not set.
EXAMPLES¶
/etc/security/faillock.conf file example:
deny=4
unlock_time=1200
silent
FILES¶
/etc/security/faillock.conf
the config file for custom options
AUTHOR¶
pam_faillock was written by Tomas Mraz. The support for
faillock.conf was written by Brian Ward.