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實(shí)例講解Oracle監(jiān)聽口令及監(jiān)聽器安全

瀏覽:130日期:2023-11-27 10:39:43

很多人都知道,Oracle的監(jiān)聽器一直存在著一個(gè)安全隱患,假如不設(shè)置安全措施,那么能夠訪問(wèn)的用戶就可以遠(yuǎn)程關(guān)閉監(jiān)聽器。

相關(guān)示例:

D:>lsnrctl stop eygle

LSNRCTL for 32-bit Windows: Version 10.2.0.3.0 - Production on 28-11月-2007 10:02:40

Copyright (c) 1991, 2006, Oracle.; All rights reserved.

正在連接到 (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=172.16.33.11)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=eygle)))命令執(zhí)行成功

大家可以發(fā)現(xiàn),此時(shí)缺省的監(jiān)聽器的日志還無(wú)法記錄操作地址:

No longer listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=172.16.33.11)(PORT=1521)))28-NOV-2007 09:59:20 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=)(USER=Administrator))(COMMAND=stop)(ARGUMENTS=64)(SERVICE=eygle)(VERSION=169870080)) * stop * 0

為了更好的保證監(jiān)聽器的安全,大家最好為監(jiān)聽設(shè)置密碼:

[oracle@jumper log]$ lsnrctl;;;

LSNRCTL for Linux: Version 9.2.0.4.0 - Production on 28-NOV-2007 10:18:17

Copyright (c) 1991, 2002, Oracle Corporation.; All rights reserved.

Welcome to LSNRCTL, type 'help' for information.

LSNRCTL> set current_listener listenerCurrent Listener is listenerLSNRCTL> change_passwordOld password: New password: Reenter new password: Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=172.16.33.11)(PORT=1521)))Password changed for listenerThe command completed successfullyLSNRCTL> set passwordPassword: The command completed successfullyLSNRCTL> save_configConnecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=172.16.33.11)(PORT=1521)))Saved LISTENER configuration parameters.Listener Parameter File; /opt/oracle/product/9.2.0/network/admin/listener.oraOld Parameter File; /opt/oracle/product/9.2.0/network/admin/listener.bakThe command completed successfully

在我們?cè)O(shè)置密碼后,遠(yuǎn)程操作將會(huì)因缺失密碼而出現(xiàn)失敗:

D:>lsnrctl stop eygle

LSNRCTL for 32-bit Windows: Version 10.2.0.3.0 - Production on 28-11月-2007 10:22:57Copyright (c) 1991, 2006, Oracle.; All rights reserved.

正在連接到 (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=172.16.33.11)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=eygle)))TNS-01169: 監(jiān)聽程序尚未識(shí)別口令

注意:此時(shí)在服務(wù)器端或客戶端,都需要我們通過(guò)密碼來(lái)起停監(jiān)聽器:

LSNRCTL> set passwordPassword: The command completed successfullyLSNRCTL> stopConnecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=172.16.33.11)(PORT=1521)))The command completed successfullyLSNRCTL> startStarting /opt/oracle/product/9.2.0/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 9.2.0.4.0 - ProductionSystem parameter file is /opt/oracle/product/9.2.0/network/admin/listener.oraLog messages written to /opt/oracle/product/9.2.0/network/log/listener.logTrace information written to /opt/oracle/product/9.2.0/network/trace/listener.trcListening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=172.16.33.11)(PORT=1521)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=172.16.33.11)(PORT=1521)))STATUS of the LISTENER------------------------Alias;LISTENERVersion; TNSLSNR for Linux: Version 9.2.0.4.0 - ProductionStart Date;;;;;28-NOV-2007 10:22:23Uptime;0 days 0 hr. 0 min. 0 secTrace Level;;;supportSecurity; ONSNMP;;;OFFListener Parameter File; /opt/oracle/product/9.2.0/network/admin/listener.oraListener Log File;;;;;/opt/oracle/product/9.2.0/network/log/listener.logListener Trace File;;;/opt/oracle/product/9.2.0/network/trace/listener.trcListening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=172.16.33.11)(PORT=1521)))Services Summary...Service 'eygle' has 1 instance(s). Instance 'eygle', status UNKNOWN, has 1 handler(s) for this service...Service 'julia' has 1 instance(s). Instance 'eygle', status UNKNOWN, has 1 handler(s) for this service...The command completed successfully

另外,ADMIN_RESTRICTIONS參數(shù)也是一個(gè)重要的安全選項(xiàng),大家可以在 listener.ora 文件中設(shè)置 ADMIN_RESTRICTIONS_ 為 ON,此后所有在運(yùn)行時(shí)對(duì)監(jiān)聽器的修改都將會(huì)被阻止,所有對(duì)監(jiān)聽器的修改都必須通過(guò)手工修改listener.ora文件才能順利完成。

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