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Audit successful login session for sql developer in oracle database
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Message Score Author Date
Dear Friend, Kindly share code to audit success...... Prasathi Ji Apr 29, 2020, 12:50
Dear DBA, I hope that everyone is taking care the...... Score: 200 PtsScore: 200 PtsScore: 200 PtsScore: 200 PtsScore: 200 Pts Prasathi Ji Apr 30, 2020, 21:09
Hello Prasathi, a few remarks: -A- size 10m ...... Score: 200 PtsScore: 200 PtsScore: 200 PtsScore: 200 PtsScore: 200 Pts Bruno Vroman May 06, 2020, 08:59
Hi, good remarks Bruno...not to mention that if...... Score: 100 PtsScore: 100 PtsScore: 100 PtsScore: 100 PtsScore: 100 Pts Ales Kavsek May 06, 2020, 11:19
Dear Bruno, Thankyou for your wonderful suggest...... Prasathi Ji May 06, 2020, 12:25
Hi, > How can we catch failed login user detail...... Score: 400 PtsScore: 400 PtsScore: 400 PtsScore: 400 PtsScore: 400 Pts Ales Kavsek May 06, 2020, 14:11
Hello Prasathi, you're welcome -I don't think t...... Score: 600 PtsScore: 600 PtsScore: 600 PtsScore: 600 PtsScore: 600 Pts Bruno Vroman May 06, 2020, 18:21
Dear Friends, I am very thankful to all of you ...... Prasathi Ji May 07, 2020, 17:26

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Subject: Audit successful login session for sql developer in oracle database
Author: Prasathi Ji, India
Date: Apr 29, 2020, 12:50, 29 days ago
Os info: Linux 6.8
Oracle info: Oracle11g
Message: Dear Friend,

Kindly share code to audit successful login session for sql developer in oracle database and trigger in email.

my approach to write logon trigger to monitor sql developer session who is loggin successfully in database.

Best Regards
Prasathi
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Subject: Re: Audit successful login session for sql developer in oracle database
Author: Prasathi Ji, India
Date: Apr 30, 2020, 21:09, 28 days ago
Score:   Score: 200 PtsScore: 200 PtsScore: 200 PtsScore: 200 PtsScore: 200 Pts
Message: Dear DBA,
I hope that everyone is taking care their health,family and loved one during challenging time covid-19 pandemic.
Kindly anyone can comment or give suggestion to improve trigger code to give detailed information about user session.

I have created below script to generate logon trigger.

1.standard auditing setting

Sql> conn / as sysdba

show parameter audit and check auditing is enabled or not

sql>show parameter audit_trail
name type value
audit_trail string DB

2. create tablespace user_audit_tab which store audit logs.

create tablespace USER_AUDIT_TAB
datafile '/u01/app/oracle/oradata/data/user_audit_tab01.dbf' size 10m autoextend on maxsize unlimited;


3. create audit user which will monitor database logon user

create user audit_user
identified by audit#1234
default tablespace user_audit_tab
quota unlimited on user_audit_tab
temporary tablespace temp
account unlock
profile default;

grant create session,create trigger to audit_user;

grant ADMINISTER DATABASE TRIGGER to audit_user;

alter session set nls_date_format='DD-MM-YYYY HH24:MI:SS';

create table log_audit_table(user_id varchar2(30),log_date timestamp,action varchar2(40));



CREATE OR REPLACE TRIGGER AUDIT_LOGON_USER_SESSION
AFTER LOGON ON DATABASE WHEN (USER NOT IN ('SYS','SYSTEM','SYSMAN','DBSNMP','DBADMIN','MGMT_VIEW'))
BEGIN
insert into log_trig_table(user_id, log_date, action)
values(user, sysdate, 'logging on');
END;

SQL> select * from log_audit_table;

USER_ID LOG_DATE ACTION
---------- ---------------------------------------- ------------------------------
RAM 30-APR-20 06.28.53.000000 PM logging on
RAM 30-APR-20 06.48.55.000000 PM logging on
AUDIT_USER 30-APR-20 06.49.11.000000 PM logging on

3 rows selected.

Stay safe ,happy and secure
Best Regards
Prasathi

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Subject: Re: Audit successful login session for sql developer in oracle database
Author: Bruno Vroman, Belgium
Date: May 06, 2020, 08:59, 22 days ago
Score:   Score: 200 PtsScore: 200 PtsScore: 200 PtsScore: 200 PtsScore: 200 Pts
Message: Hello Prasathi,

a few remarks:

-A- size 10m autoextend on maxsize unlimited;
:-( IMHO three things, three wrong values: a very small initial size, probably (depends of other things) a tiny increment (like 8KB), and a very large maxsize...
suggestion: SIZE 101M AUTOEXTEND ON NEXT 100M MAXSIZE 20001M;
rationale: the "1MB" is for file header, so the bits are each of "100MB for user data", and maxsize ~20GB keeps the files easy to manipulate (backup/restore), if necessary you can add more files to the tablespace.

-B- Why do you store again and again "logging on"?

-C- It might be easier to use the Oracle audit features, and this would provide you more detailed audit info and also for example the possibility to audit failed logons (failed logons won't be caught by your trigger)

-D- Your initial question was about "SQL Developer"... Maybe it is better to audit all logons (BTW your trigger doesn't limit its scope to "SQL Developer"), and don't forget that some malicious user might forge the name of the program he is using (SQL Deveoper might come in disguise)

Best regards,

Bruno Vroman.
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Subject: Re: Audit successful login session for sql developer in oracle database
Author: Ales Kavsek, Slovenia
Date: May 06, 2020, 11:19, 22 days ago
Score:   Score: 100 PtsScore: 100 PtsScore: 100 PtsScore: 100 PtsScore: 100 Pts
Message: Hi,

good remarks Bruno...not to mention that if 11g was originally created with DBCA, Oracle is already auditing all sessions out of the box.
Builtin auditing is definitely a better approach, especially because pruning is properly addressed from >= 11gR2 with package dbms_audit_mgmt (https://oracle-base.com/articles/11g/auditing-enhancements-11gr2).

Regards,
Ales
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Subject: Re: Audit successful login session for sql developer in oracle database
Author: Prasathi Ji, India
Date: May 06, 2020, 12:25, 22 days ago
Message: Dear Bruno,

Thankyou for your wonderful suggestions.

How can we catch failed login user details using trigger.


I will try to improve this trigger code to get comprensive result.

If we don't use trigger, can we set cronjob for output of connected session details from v$session and v$process for SQL developer user session.So we need not to store information in database.

Best regards
Prasathi
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Subject: Re: Audit successful login session for sql developer in oracle database
Author: Ales Kavsek, Slovenia
Date: May 06, 2020, 14:11, 22 days ago
Score:   Score: 400 PtsScore: 400 PtsScore: 400 PtsScore: 400 PtsScore: 400 Pts
Message: Hi,

> How can we catch failed login user details using trigger.

You can't (there is no such thing as BEFORE LOGON trigger that could catch wrong password). You have to use Oracle Audit.
As I suggested before, it's very likely that sessions are already audited if your DB was created with DBCA, if they're not then simply start using standard Oracle auditing functionality that is already part of the kernel; don't write something that is already done by Oracle - you'll never come even close to the quality of Oracle code anyway.

Instead of writing your own trigger, invest your time in reading about Oracle AUDIT and about using dbms_audit_mgmt package instead.
Later on, you can always write some dbms_scheduler job (or external cron script) that could periodically "scan" the audit trail and send you alert. Don't worry about the size of audit trail if all that you're auditing are connections. (unless your application is seriously buggy - millions of connect/disconnects per day)

Regards,
Ales
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Subject: Re: Audit successful login session for sql developer in oracle database
Author: Bruno Vroman, Belgium
Date: May 06, 2020, 18:21, 22 days ago
Score:   Score: 600 PtsScore: 600 PtsScore: 600 PtsScore: 600 PtsScore: 600 Pts
Message: Hello Prasathi,

you're welcome -I don't think that are wonderful ;-)

-A-
As pointed out by Alex: a trigger cannot catch the failed login because the trigger code can only be fired once you are "in" the database, so if a user attempts to log in but receives an error (like "invalid username/password", "account is locked", "account lacks create session privilege") you cannot store this info with a trigger that is fired after a successful connection.

-B-
About your other question (using a cron job to query v$session), it is obviously a totally different approach...
  * Instead of a "cron job" (started from OS level) I would suggest to create a DBMS_SCHEDULER_JOB (started from within the database)
  * independently of the triggering mechanism: the choice to store the result of your queries inside the database or to email it is yours (or a mix: store in database and email "once in a while / when there is enough info to provide").

standard audit (probably the most robust and most maintainable solution), trigger, cron script, dbms_scheduler job... I cannot chose for you, it depends of the ultimate goal... (but at first sight the standard Oracle audit seems to be the favourite)

Best regards,

Bruno.
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Subject: Re: Audit successful login session for sql developer in oracle database
Author: Prasathi Ji, India
Date: May 07, 2020, 17:26, 21 days ago
Message: Dear Friends,

I am very thankful to all of you for your kind suggestion.
Surely I will take care of your suggestions before implementing any trigger requirement in the future.

Stay safe and sound...during the pandemic period.
This time will pass quickly and we will fight back.
Best regards,
Prasathi
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