1,问题描述
Oracle默认账号是没有限制ip的,这样的隐患就在于,如果我知道了oracle账号用户名密码,我只要能连接到db,就可以对db进行操作,这样对于线上的db来说是很危险的,因为有些非dba人员,比如开发人员、测试人员一不小心误删除了线上的数据,就惨了,坑太大不敢看。所以查了查,找到一种办法,在一些重要的表上加触发器来限制用户对线上db的表的操作。
2,触发器编写
如果开全局的sql审计,消耗性能太大,不太合适,想来只有在某些重要的表上做限制,初步解决问题了。
1) 验证ip:(sys_context('userenv','ip_address')not in('192.168.120.211')
2) 验证用户名:selects.USERNAME into v_username from v$session s where s.audsid=(selectuserenv('SESSIONID') from dual) and rownum insert into stu.zzz_testvalues(3,'zhuren33');
insert into stu.zzz_testvalues(3,'zhuren33')
ORA-20001: can not insert the table
ORA-06512: at"stuuser.PRI_STU_ACCT_LIMIT", line 18
ORA-04088: error during execution oftrigger 'stuuser.PRI_STU_ACCT_LIMIT'
SQL> commit;
Commit complete
SQL>
SQL> update stu.zzz_test setremark='zhuren33_up' where id=3;
update stu.zzz_test setremark='zhuren33_up' where id=3
ORA-20001: can not update the table
ORA-06512: at"stuuser.PRI_STU_ACCT_LIMIT", line 22
ORA-04088: error during execution oftrigger 'stuuser.PRI_STU_ACCT_LIMIT'
SQL> commit;
Commit complete
SQL>
SQL> delete from stu.zzz_test where id=3;
delete from stu.zzz_test where id=3
ORA-20001: can not delete the table
ORA-06512: at"stuuser.PRI_STU_ACCT_LIMIT", line 14
ORA-04088: error during execution oftrigger 'stuuser.PRI_STU_ACCT_LIMIT'
SQL> commit;
Commit complete
SQL>
OK增删改都可以被限制住了,应该暂时解决了问题所在,后续还是有很多问题需要一起解决的。
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