RE: Username with failed login

Greetings,

I have used the following steps to track the users with failed login.

Step 1: Change the initialization parameter audit_trail to be: audit_trail=db, bounce the database
Step 2: connect to the database as a user that has the privilege "AUDIT SYSTEM"
(both SYS and SYSTEM has this privilege) SQL> audit session whenever not successful; Step 3: At this point we can see these unsuccessful logins by monitoring the 'dba_audit_trail' view
Note :If we want to disable this tracking then we can use SQL> noaudit session whenever not successful; Note: This auditing does not get disabled by bouncing the database.

Thanks,
Ashoke

-----Original Message-----
From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Paul Drake Sent: Monday, August 15, 2005 1:03 PM
To: mschmitt_at_uchicago.edu
Cc: oracle-l_at_freelists.org
Subject: Re: Username with failed login

On 8/15/05, Mike Schmitt <mschmitt_at_uchicago.edu> wrote:
>
> Hi All,
>
> I am trying to catch failed login attempts by using an after
> servererror database trigger. We would like to be able to catch the
> username that is being provided with these attempts, but so far I
haven't had any luck.
>
> Is is possible to capture the name that was provided as part of the
> logon attempt and record that information, or do we have to use a
> different method?
>
> The edited trigger/proc we are using look like the following (We are
> using
> 9.2.0.4):
>
>

Mike,

Instead of coding this by hand, why not just leverage the provided functionality?

SQL> show parameter audit_trail

NAME                                 TYPE        VALUE
------------------------------------ -----------
------------------------------
audit_trail                          string      TRUE

SQL> audit session whenever not successful;

Audit succeeded.

SQL> connect notauser/notmypass_at_mydb
ERROR:
ORA-01017: invalid username/password; logon denied

Warning: You are no longer connected to ORACLE.

after reconnecting with a prvileged account:

  1 select username, userhost, returncode   2 from dba_audit_session
  3 where timestamp>sysdate-1/24
  4* and username='NOTAUSER'
SQL> /

USERNAME        USERHOST                       RETURNCODE
--------------- ------------------------------ ----------
NOTAUSER        MYDOMAIN\MYDESKTOP                      1017

hth.

Pd

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