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pam_tty_audit -- Enable or disable TTY auditing for specified users
--------------------------------------------------------------------------
DESCRIPTION
The pam_tty_audit PAM module is used to enable or disable TTY auditing. By
default, the kernel does not audit input on any TTY.
OPTIONS
disable=patterns
For each user matching patterns, disable TTY auditing. This
overrides any previous enable option matching the same user name
on the command line. See NOTES for further description of
patterns.
enable=patterns
For each user matching patterns, enable TTY auditing. This
overrides any previous disable option matching the same user name
on the command line. See NOTES for further description of
patterns.
open_only
Set the TTY audit flag when opening the session, but do not
restore it when closing the session. Using this option is
necessary for some services that don't fork() to run the
authenticated session, such as sudo.
log_passwd
Log keystrokes when ECHO mode is off but ICANON mode is active.
This is the mode in which the tty is placed during password entry.
By default, passwords are not logged. This option may not be
available on older kernels (3.9?).
NOTES
When TTY auditing is enabled, it is inherited by all processes started by
that user. In particular, daemons restarted by an user will still have TTY
auditing enabled, and audit TTY input even by other users unless auditing
for these users is explicitly disabled. Therefore, it is recommended to
use disable=* as the first option for most daemons using PAM.
To view the data that was logged by the kernel to audit use the command
aureport --tty.
The patterns are comma separated lists of glob patterns or ranges of uids.
A range is specified as min_uid:max_uid where one of these values can be
empty. If min_uid is empty only user with the uid max_uid will be matched.
If max_uid is empty users with the uid greater than or equal to min_uid
will be matched.
Please note that passwords in some circumstances may be logged by TTY
auditing even if the log_passwd is not used. For example all input to a
ssh session will be logged - even if there is a password being typed into
some software running at the remote host because only the local TTY state
affects the local TTY auditing.
EXAMPLES
Audit all administrative actions.
session required pam_tty_audit.so disable=* enable=root
AUTHOR
pam_tty_audit was written by Miloslav Trmac <mitr@redhat.com>. The
log_passwd option was added by Richard Guy Briggs <rgb@redhat.com>.