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- pam_tty_audit — Enable or disable TTY auditing for specified users
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- 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 a 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 an 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 Trmač <mitr@redhat.com>. The log_passwd
- option was added by Richard Guy Briggs <rgb@redhat.com>.
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