barcode reader for java free download Work with Standard Database Auditing in Software

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EXERCISE 12-2 Use Standard Database Auditing
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In this exercise, you will enable standard database auditing and see the results, using either Database Control or SQL*Plus If you use Database Control, be sure to click the Show SQL button whenever possible to see the SQL statements being generated 1 Connect to your database as user SYSTEM and create a user and a table to be used for the exercise:
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create user sabine identified by oracle; create table systemaudi as select * from all_users; grant create session, select any table to sabine; grant select on audi to sabine;
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2 Enable auditing of SABINE s use of her SELECT ANY PRIVILEGE, and of all accesses to the table AUDI With SQL*Plus:
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audit select any table by access; audit all on systemaudi by access;
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With Database Control, this can be done from the Audit Settings window 3 Connect to the database as user SYS This is necessary, as this step involves restarting the instance Set the audit trail destination to DB and enable auditing of privileged users, and bounce the instance Using SQL*Plus:
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alter system set audit_trail='DB_EXTENDED' scope=spfile; alter system set audit_sys_operations=true scope =spfile; startup force;
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Using Database Control, a possible navigation path from the database home page is to take the Server tab, and then the Audit Settings link in the Security section Clicking the link labeled Audit Trail in the Configuration section will take you to a window where you can modify the parameter settings in the spfile Alternatively, go directly to the Initialization Parameters window from the Server tab by taking the Initialization Parameters link in the Database Configuration section Set the two parameters in the spfile, and then from the database home page shut down and restart the database 4 While connected as SYS, all statements will be audited Run this statement:
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select count(*) from systemaudi;
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12:
Implementing Oracle Database Security
5 If using Linux or Unix, identify the location of the system audit trail by querying the parameter AUDIT_FILE_DEST This will be used for the auditing of SYS operations, irrespective of the setting for AUDIT_DEST With SQL*Plus:
select value from v$parameter where name='audit_file_dest';
Using an operating system utility, navigate to this directory and open the most recently created file If using Microsoft Windows, open the Application Log in the Event Viewer Either way, you will see the SELECT statement that you executed as SYS, with detail of the operating system user and hostname 6 Connect to the database as SABINE, and run these queries:
select count(*)from systemaudi; select count(*) from systemproduct_user_profile;
7 As user SYSTEM, run this query to see the audit events:
select sql_text,priv_used,action_name from dba_audit_trail where username='SABINE';
Note that she uses the lowest possible privilege: her access to the AUDI table was through her object privilege, not through the much more powerful system privilege that was needed to get to PRODUCT_USER_PROFILE 8 Tidy up:
drop user sabine; drop table systemaudi;
SCENARIO & SOLUTION
If you are told that your system will shortly be the subject of a computer security audit, what should you do Nothing! At least, not beforehand The auditors will want to see the system as it is in normal running You should cooperate fully with the auditors, with the attitude that they are there to help you A good computer audit will be very useful Implementing any recommendations may be a lot of work but that is what you are being paid for Try to focus the auditing as tightly as possible, so that you only get audit records for events that really matter If possible, audit by session, not by access If auditing to the database, the SYSAUD$ table may grow to many gigabytes: it will need to be deleted or truncated periodically
Enabling standard database auditing can impact in performance by generating a huge amount of audit data How can this be controlled
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