RE: URGENT Help on tracking unauthorized login to Oracle Database

AUDIT SESSION also captures failed logins -- look for RETURNCODE=1017 in SYS.AUD$ e.g.
alter session set nls_date_format ='DD-MON-HH24:MI:SS';

select os_username, username, userhost, terminal, timestamp, returncode from sys.dba_audit_session
where returncode != 0
order by timestamp
/

However, it (ie, in my 8.0.5.1/Tru64 database) does not capture the remote host name properly --
userhost is always NULL and terminal has a truncated value of the hostname for NT clients with long
hostnames (V$SESSION does capture the hostname correctly in MACHINE -- but this would only be for successful logins !).

Hemant K Chitale
Principal DBA
Chartered Semiconductor Manufacturing Ltd

"Mandal, Ashoke" <ashoke.k.mandal_at_medtronic.com> 09/02/2002 02:53 AM Sent by: root_at_fatcity.com

Please respond to ORACLE-L

                                                                                       
                        
             To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>           
                        
             cc: (bcc: CHITALE Hemant Krishnarao/IT/CHRT/ST Group)                     
                        
             Subject: RE: URGENT Help on tracking unauthorized login to Oracle         
                        
             Database                                                                  
                        
                                                                                       
                        
                                                                                       
                        
                                                                                       
                        

Joe,

We referred the auditing option. My understanding is that you can track the oracle users using database auditing feature once the users are logged into the database.

But my requirement is to track the users who tried to login to the database but could not login due to wrong password.

For example, somebody may know the connect string for an oracle database and trying to login to the database as system user and with various combination of password. We like to know who are these users.

Thanks,
Ashoke

-----Original Message-----
Sent: Friday, February 08, 2002 11:54 AM To: Multiple recipients of list ORACLE-L Database

Administrators guide

chapter on auditing.

joe

Mandal, Ashoke wrote:

>>Greetings,
>>
>>We have a database with very sensitive data. Our management wants me to
find out the way to secure this data from unauthorized login and track these users who tried to login to this database.
>>
>>Is there any way we can track the unauthorized users, who try to login to
an oracle database with invalid userid or password but with valid connect string.
>>
>>If there is no options under oracle then is there any 3rd party software
for this purpose.
>>
>>Any help is appreciated
>>
>>Thanks,
>>Ashoke
>>

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