Adding upstream version 1.4.0.upstream/1.4.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 156 insertions, 0 deletions

diff --git a/modules/pam_tally2/README b/modules/pam_tally2/README
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+pam_tally2 — The login counter (tallying) module
+
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+DESCRIPTION
+
+This module maintains a count of attempted accesses, can reset count on
+success, can deny access if too many attempts fail.
+
+pam_tally2 comes in two parts: pam_tally2.so and pam_tally2. The former is the
+PAM module and the latter, a stand-alone program. pam_tally2 is an (optional)
+application which can be used to interrogate and manipulate the counter file.
+It can display user counts, set individual counts, or clear all counts. Setting
+artificially high counts may be useful for blocking users without changing
+their passwords. For example, one might find it useful to clear all counts
+every midnight from a cron job.
+
+Normally, failed attempts to access root will not cause the root account to
+become blocked, to prevent denial-of-service: if your users aren't given shell
+accounts and root may only login via su or at the machine console (not telnet/
+rsh, etc), this is safe.
+
+OPTIONS
+
+GLOBAL OPTIONS
+
+    This can be used for auth and account module types.
+
+    onerr=[fail|succeed]
+
+        If something weird happens (like unable to open the file), return with 
+        PAM_SUCCESS if onerr=succeed is given, else with the corresponding PAM
+        error code.
+
+    file=/path/to/counter
+
+        File where to keep counts. Default is /var/log/tallylog.
+
+    audit
+
+        Will log the user name into the system log if the user is not found.
+
+    silent
+
+        Don't print informative messages. The messages printed without the 
+        silent option leak presence of accounts on the system because they are
+        not printed for non-existing accounts.
+
+    no_log_info
+
+        Don't log informative messages via syslog(3).
+
+    debug
+
+        Always log tally count when it is incremented as a debug level message
+        to the system log.
+
+AUTH OPTIONS
+
+    Authentication phase first increments attempted login counter and checks if
+    user should be denied access. If the user is authenticated and the login
+    process continues on call to pam_setcred(3) it resets the attempts counter.
+
+    deny=n
+
+        Deny access if tally for this user exceeds n.
+
+    lock_time=n
+
+        Always deny for n seconds after failed attempt.
+
+    unlock_time=n
+
+        Allow access after n seconds after failed attempt. If this option is
+        used the user will be locked out for the specified amount of time after
+        he exceeded his maximum allowed attempts. Otherwise the account is
+        locked until the lock is removed by a manual intervention of the system
+        administrator.
+
+    magic_root
+
+        If the module is invoked by a user with uid=0 the counter is not
+        incremented. The sysadmin should use this for user launched services,
+        like su, otherwise this argument should be omitted.
+
+    even_deny_root
+
+        Root account can become unavailable.
+
+    root_unlock_time=n
+
+        This option implies even_deny_root option. Allow access after n seconds
+        to root account after failed attempt. If this option is used the root
+        user will be locked out for the specified amount of time after he
+        exceeded his maximum allowed attempts.
+
+    serialize
+
+        Serialize access to the tally file using locks. This option might be
+        used only for non-multithreaded services because it depends on the
+        fcntl locking of the tally file. Also it is a good idea to use this
+        option only in such configurations where the time between auth phase
+        and account or setcred phase is not dependent on the authenticating
+        client. Otherwise the authenticating client will be able to prevent
+        simultaneous authentications by the same user by simply artificially
+        prolonging the time the file record lock is held.
+
+ACCOUNT OPTIONS
+
+    Account phase resets attempts counter if the user is not magic root. This
+    phase can be used optionally for services which don't call pam_setcred(3)
+    correctly or if the reset should be done regardless of the failure of the
+    account phase of other modules.
+
+    magic_root
+
+        If the module is invoked by a user with uid=0 the counter is not
+        changed. The sysadmin should use this for user launched services, like 
+        su, otherwise this argument should be omitted.
+
+NOTES
+
+pam_tally2 is not compatible with the old pam_tally faillog file format. This
+is caused by requirement of compatibility of the tallylog file format between
+32bit and 64bit architectures on multiarch systems.
+
+There is no setuid wrapper for access to the data file such as when the 
+pam_tally2.so module is called from xscreensaver. As this would make it
+impossible to share PAM configuration with such services the following
+workaround is used: If the data file cannot be opened because of insufficient
+permissions (EACCES) the module returns PAM_IGNORE.
+
+EXAMPLES
+
+Add the following line to /etc/pam.d/login to lock the account after 4 failed
+logins. Root account will be locked as well. The accounts will be automatically
+unlocked after 20 minutes. The module does not have to be called in the account
+phase because the login calls pam_setcred(3) correctly.
+
+auth     required       pam_securetty.so
+auth     required       pam_tally2.so deny=4 even_deny_root unlock_time=1200
+auth     required       pam_env.so
+auth     required       pam_unix.so
+auth     required       pam_nologin.so
+account  required       pam_unix.so
+password required       pam_unix.so
+session  required       pam_limits.so
+session  required       pam_unix.so
+session  required       pam_lastlog.so nowtmp
+session  optional       pam_mail.so standard
+
+
+AUTHOR
+
+pam_tally2 was written by Tim Baverstock and Tomas Mraz.
+