On Monday, October 10, 2011 09:54:00 AM Steve M. Zak wrote:
 Hi,
 
 Through experimentation and per Red Hat tech support when the deny=x switch
 is set in /etc/pam.d/login as below
 
 auth       required     pam_tally2.so deny=5 onerr=fail
 
 the lockout happens at 5 failed attempts, but the audit trail does not
 record it until the next try. 
The man page says that the account lockout occurs when the tally _exceeds_ the deny 
parameter. To lockout on 5 failed attempts, use deny=4.
-Steve