DESCRIPTION
\nThis module maintains a count of attempted accesses, can reset count on
\nsuccess, can deny access if too many attempts fail.<\/p>\n
pam_tally2 comes in two parts: pam_tally2.so and pam_tally2. The former
\nis the PAM module and the latter, a stand-alone program. pam_tally2 is
\nan (optional) application which can be used to interrogate and
\nmanipulate the counter file. It can display users\u2019 counts, set
\nindividual counts, or clear all counts. Setting artificially high
\ncounts may be useful for blocking users without changing their
\npasswords. For example, one might find it useful to clear all counts
\nevery midnight from a cron job.<\/p>\n
Normally, failed attempts to access root will not cause the root
\naccount to become blocked, to prevent denial-of-service: if your users
\naren\u2019t given shell accounts and root may only login via su or at the
\nmachine console (not telnet\/rsh, etc), this is safe.<\/p>\n
OPTIONS
\nGLOBAL OPTIONS
\nThis can be used for auth and account module types.<\/p>\n
onerr=[fail|succeed]
\nIf something weird happens (like unable to open the file),
\nreturn with PAM_SUCCESS if onerr=succeed is given, else with
\nthe corresponding PAM error code.<\/p>\n
file=\/path\/to\/counter
\nFile where to keep counts. Default is \/var\/log\/tallylog.<\/p>\n
audit
\nWill log the user name into the system log if the user is not
\nfound.<\/p>\n
silent
\nDon\u2019t print informative messages.<\/p>\n
no_log_info
\nDon\u2019t log informative messages via syslog(3).<\/p>\n
AUTH OPTIONS
\nAuthentication phase first increments attempted login counter and
\nchecks if user should be denied access. If the user is
\nauthenticated and the login process continues on call to
\npam_setcred(3) it resets the attempts counter.<\/p>\n
deny=n
\nDeny access if tally for this user exceeds n.<\/p>\n
lock_time=n
\nAlways deny for n seconds after failed attempt.<\/p>\n
unlock_time=n
\nAllow access after n seconds after failed attempt. If this
\noption is used the user will be locked out for the specified
\namount of time after he exceeded his maximum allowed attempts.
\nOtherwise the account is locked until the lock is removed by a
\nmanual intervention of the system administrator.<\/p>\n
magic_root
\nIf the module is invoked by a user with uid=0 the counter is
\nnot incremented. The sysadmin should use this for user launched
\nservices, like su, otherwise this argument should be omitted.<\/p>\n
no_lock_time
\nDo not use the .fail_locktime field in \/var\/log\/faillog for
\nthis user.<\/p>\n
even_deny_root
\nRoot account can become unavailable.<\/p>\n
root_unlock_time=n
\nThis option implies even_deny_root option. Allow access after n
\nseconds to root account after failed attempt. If this option is
\nused the root user will be locked out for the specified amount
\nof time after he exceeded his maximum allowed attempts.<\/p>\n
serialize
\nSerialize access to the tally file using locks. This option
\nmight be used only for non-multithreaded services because it
\ndepends on the fcntl locking of the tally file. Also it is a
\ngood idea to use this option only in such configurations where
\nthe time between auth phase and account or setcred phase is not
\ndependent on the authenticating client. Otherwise the
\nauthenticating client will be able to prevent simultaneous
\nauthentications by the same user by simply artificially
\nprolonging the time the file record lock is held.<\/p>\n
ACCOUNT OPTIONS
\nAccount phase resets attempts counter if the user is not magic
\nroot. This phase can be used optionally for services which don\u2019t
\ncall pam_setcred(3) correctly or if the reset should be done
\nregardless of the failure of the account phase of other modules.<\/p>\n
magic_root
\nIf the module is invoked by a user with uid=0 the counter is
\nnot changed. The sysadmin should use this for user launched
\nservices, like su, otherwise this argument should be omitted.<\/p>\n
Example:<\/strong> To unlock account<\/strong> DESCRIPTION This module maintains a count of attempted accesses, can reset count on success, can deny access if too many attempts fail.<\/p>\n 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 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,4,17],"tags":[],"_links":{"self":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/4056"}],"collection":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4056"}],"version-history":[{"count":1,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/4056\/revisions"}],"predecessor-version":[{"id":4057,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/4056\/revisions\/4057"}],"wp:attachment":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4056"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4056"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4056"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nTo get information about when invalid login attempted<\/strong>
\nserver1:\/root>pam_tally2
\nLogin Failures Latest failure From
\njohn 12 04\/01\/12 10:18:35 server2<\/p>\n
\nserver1:\/root>pam_tally2 -r -u\u00a0john
\nLogin Failures Latest failure From
\nyangw 3 05\/16\/13 01:06:35 pts\/7<\/p>\n","protected":false},"excerpt":{"rendered":"