Audit failed logon attempts

it is difficult to audit failed sign-on attempts because the user never gets connected to Oracle but you can try this solution below :

Step 1 :
sqlplus / as sysdba
Connected.
SQL> alter system set audit_trail=DB scope=spfile ;
OR

audit_trail=true

Step 2 :

SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup ;
ORACLE instance started.

Step 3 :

sqlplus / as sysdba

SQL> audit session whenever not successful ;

Step 4 :

Test auditing if it works

sqlplus scott/osama ;

ERROR:
ORA-01017: invalid username/password; logon denied
Warning: You are no longer connected to ORACLE.

Step 5:

sqlplus / as sysdba

Use the below Script :

select os_username, username, terminal, to_char(timestamp,’MM-DD-YYYY HH24:MI:SS’) “TIME” from dba_audit_trail;

select os_username,username,userhost,to_char(timestamp,’mm/dd/yyyy hh24:mi:ss’) timestamp,returncode from dba_audit_session where action_name = ‘LOGON’ and returncode > 0
order by timestamp ;

OS_USERNAME USERNAME TERMINAL TIME
————— ————— ————— ——————-
oracle SCOTT pst/1 07-06-201216:21:13

Enjoy

Osama …

Audit failed logon attempts

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