[CentOS] CentOS 5 - locking out users afer 3 failed attempts
R P Herrold
herrold at centos.org
Tue Apr 20 19:52:42 UTC 2010
On Tue, 20 Apr 2010, Tom Brown wrote:
> I thought i could achieve this with
> auth required pam_tally.so deny=3 unlock_time=600
> in /etc/pam.d/system-auth but it seems to not be the case - I cant
> find a working config for this anywhere and i wonder if anyone has one
> they can share?
Does '/var/log/faillog' exist and is it properly writable?
Is SELinux in play, etc? The man page does not speak in terms
of edits to: /etc/pam.d/system-auth but rather to:
/etc/pam.d/login [note -- I suspect there may be a man page
bug here ... in testing; changes to /etc/pam.d/login and some
intentionally failed logins, do not seem to cause content to
be added to /var/log/faillog . Making the edit to:
/etc/pam.d/system-auth-ac DOES cause content to be registered,
and to show up with the 'faillog -a' command [*1] ].
/etc/pam.d/system-auth is a symlink to:
/etc/pam.d/system-auth-ac on my C 5 box, and editting here
seems to work just fine:
[root at centos-5 pam.d]# diff -u system-auth-ac~ system-auth-ac
--- system-auth-ac~ 2010-04-20 15:46:34.000000000 -0400
+++ system-auth-ac 2010-04-20 15:46:34.000000000 -0400
@@ -2,6 +2,7 @@
# This file is auto-generated.
# User changes will be destroyed the next time authconfig is run.
auth required pam_env.so
+auth required pam_tally.so deny=3 unlock_time=600 per_user
auth sufficient pam_unix.so nullok try_first_pass
auth requisite pam_succeed_if.so uid >= 500 quiet
auth required pam_deny.so
[root at centos-5 pam.d]#
Nota bene: Note that the GUI tools will happily 'tromp' on
changes you make, and do not retain backups.
Did you edit /etc/pam.d/login / /etc/pam.d/system-auth-ac
at the bottom of that man page, and
man 8 faillog
Not enough here to diagnose properly presently.
-- Russ herrold
[root at centos-5 log]# faillog -a
Login Failures Maximum Latest On
thomas 9 0 04/20/10 15:47:02 -0400 localhost.l
[root at centos-5 log]#
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