導讀:1建站知識在Oracle里，不像MySQL那樣方便，可以直接在用戶上進行IP限制，Oracle要實現(xiàn)用戶級別的IP限制，可以使用觸發(fā)器來迂回網(wǎng)站建設(shè)公司營銷型網(wǎng)站建設(shè)。

下面是一個觸發(fā)器的例子：

復制代碼 代碼如下:

create or replace trigger logon_ip_controlafter logon on databasedeclare  ip STRING(30);  user STRING(30);beginSELECT SYS_CONTEXT('USERENV','SESSION_USER') into user from dual;SELECT SYS_CONTEXT('USERENV','IP_ADDRESS') into ip from dual;if user='EPAY_USER'   THEN      IF ip not in ('192.168.219.20','192.168.219.22')        THEN raise_application_error(-20001,'User '||user||' is not allowed to connect from '||ip);      END IF;END IF;end;/

該觸發(fā)器對用戶EPAY_USER進行了IP限制（只允許'192.168.219.20','192.168.219.22'建設(shè)網(wǎng)站，如果需要設(shè)置IP段，用%或?代替即可，如'192.168.219.%‘）。下面看幾個例子測試一下：1）從非允許IP地址登陸 （192.168.219.21），連接失敗

復制代碼 代碼如網(wǎng)站建設(shè)制作下:

[oracle@lxdb2 ~]$ sqlplus epay_user@priSQL*Plus: Relea網(wǎng)站seo優(yōu)化診斷工具se 11.2.0.3.0 Production on Wed Jul 3 19:23:48 2013Copyright (c) 1982, 2011, Oracle.  All rights reserved.Enter password: ERROR:ORA-00604: error occurred at recursive SQL level 1ORA-20001: User EPAY_USER is not allowed to connect from 192.168.219.21ORA-06512: at line 10

2）從允許IP地址登陸（192.168.219.22），連接成功

復制代碼 代碼如下:

[oracle@lxdb1 ~]$ sqlplus epay_userSQL*Plus: Release 11.2.0.3.0 Production on Wed Jul 3 11:24:25 2013Copyright (c) 1982, 2011, Oracle.  All rights reserved.Enter password: Connected to:Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit ProductionWith the Partitioning, OLAP, Data Mining and Real Application Testing options

3）從本地登陸(192.168.219.23）不受IP限制影響，連接成功

復制代碼 代碼如下:

[oracle@lxdb1 ~]$ sqlplus epay_userSQL*Plus: Release 11.2.0.3.0 Production on Wed Jul 3 11:24:25 2013Copyright (c) 1982, 2011, Oracle.  All rights reserved.Enter password: Connected to:Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit ProductionWith the Partitioning, OLAP, Data Mining and Real Application Testing options

相關(guān)網(wǎng)站建設(shè)公司營銷型網(wǎng)站建設(shè)。

關(guān)鍵詞標簽: IP 用戶登錄 觸發(fā)器