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TNS:could not resolve the connect identifier specified
Backtrace message unwound by exceptions
invalid identifier
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end-of-file on communication channel
TNS:listener unknown in connect descriptor
insufficient privileges
PL/SQL: numeric or value error string
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ORACLE not available
target host or object does not exist
invalid number
unable to allocate string bytes of shared memory
resource busy and acquire with NOWAIT specified
error occurred at recursive SQL level string
ORACLE initialization or shutdown in progress
archiver error. Connect internal only, until freed
snapshot too old
unable to extend temp segment by string in tablespace
Credential retrieval failed
missing or invalid option
invalid username/password; logon denied
unable to create INITIAL extent for segment
out of process memory when trying to allocate string bytes
shared memory realm does not exist
cannot insert NULL
TNS:unable to connect to destination
remote database not found ora-02019
exception encountered: core dump
inconsistent datatypes
no data found
TNS:operation timed out
PL/SQL: could not find program
existing state of packages has been discarded
maximum number of processes exceeded
error signaled in parallel query server
ORACLE instance terminated. Disconnection forced
TNS:packet writer failure
see ORA-12699
missing right parenthesis
name is already used by an existing object
cannot identify/lock data file
invalid file operation
quoted string not properly terminated

Re: Username with failed login

Paul Drake

2005-08-15

Replies:
On 8/15/05, Mike Schmitt <mschmitt@(protected):
>
> 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@(protected)
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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