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Oracle的监听口令及监听器安全
作者：eygle |【转载时请以超链接形式标明文章出处和作者信息及本声明】链接：http://www.eygle.com/archives/2007/11/listener_security.html
Oracle的监听器一直以来都存在一个严重的安全问题，那就是：
如果不设置安全措施，那么能够访问的用户就可以远程关闭监听器。
类似如下操作：
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.
正在连接到 (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=172.16.33.11)(PORT=1521))
(CONNECT_DATA=(SERVICE_NAME=eygle)))
命令执行成功
而此时缺省的监听器的日志还无法记录操作地址：
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
这个问题由来已久，为了保证监听器的安全，最好为监听设置密码：
[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 listener
Current Listener is listener
LSNRCTL> change_password
Old password:
New password:
Reenter new password:
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=172.16.33.11)(PORT=1521)))
Password changed for listener
The command completed successfully
LSNRCTL> set password
Password:
The command completed successfully
LSNRCTL> save_config
Connecting 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.ora
Old Parameter File /opt/oracle/product/9.2.0/network/admin/listener.bak
The command completed successfully
设置密码之后，远程操作将会因确实密码而失败：
D:\>lsnrctl stop eygle
LSNRCTL for 32-bit Windows: Version 10.2.0.3.0 - Production on 28-11月-2007 10:22:57
Copyright (c) 1991, 2006, Oracle. All rights reserved.
正在连接到 (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=172.16.33.11)
(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=eygle)))
TNS-01169: 监听程序尚未识别口令
此时在服务器端或客户端，都需要通过密码来起停监听器：
LSNRCTL> set password
Password:
The command completed successfully
LSNRCTL> stop
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=172.16.33.11)(PORT=1521)))
The command completed successfully
LSNRCTL> start
Starting /opt/oracle/product/9.2.0/bin/tnslsnr: please wait...
TNSLSNR for Linux: Version 9.2.0.4.0 - Production
System parameter file is /opt/oracle/product/9.2.0/network/admin/listener.ora
Log messages written to /opt/oracle/product/9.2.0/network/log/listener.log
Trace information written to /opt/oracle/product/9.2.0/network/trace/listener.trc
Listening 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 LISTENER
Version TNSLSNR for Linux: Version 9.2.0.4.0 - Production
Start Date 28-NOV-2007 10:22:23
Uptime 0 days 0 hr. 0 min. 0 sec
Trace Level support
Security ON
SNMP OFF
Listener Parameter File /opt/oracle/product/9.2.0/network/admin/listener.ora
Listener Log File /opt/oracle/product/9.2.0/network/log/listener.log
Listener Trace File /opt/oracle/product/9.2.0/network/trace/listener.trc
Listening 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
此外，ADMIN_RESTRICTIONS参数也是一个重要的安全选项，我们可以在 listener.ora 文件中设置 ADMIN_RESTRICTIONS_<listener name> 为 ON，此后所有在运行时对监听器的修改都将被阻止，所有对监听器的修改都必须通过手工修改 listener.ora 文件来完成。
关于监听器安全参考文档：
Integrigy_Oracle_Listener_TNS_Security.pdf
-The End-
By eygle on 2007-11-28 11:54 | Comments (9) | Posted to FAQ | Edit |Pageviews:
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留言 (9)
学习了。
Posted by: fwei_fengwei at November 29, 2007 8:34 AM
真巧，昨天刚好研究了一下这个东西
Posted by: space6212 at November 29, 2007 9:02 AM
看看先。
Posted by: 命运呼叫转移 at November 29, 2007 1:15 PM
:)之前是看过这个问题，在9i的版本下测试：能对远程的stop，但是做start不行。设置密码后，哪怕知道密码，也不能对远程监听做stop。
“此时在服务器端或客户端，都需要通过密码来起停监听器：”——这边，stop是要用密码，start监听不用密码吧？
Posted by: 小荷 at November 30, 2007 9:34 AM
这个在10g好象是不行了吧
Posted by: 棉花糖ONE at December 9, 2007 1:01 PM
好像有个问题,可以通过口令stop 监听,但是start 监听不需要任何密码?
Posted by: chen_7733 at March 18, 2008 10:21 AM
我在10G下测试，密码不起作用
Posted by: lypflash at April 9, 2008 9:50 AM
in 10g no
Posted by: www at July 3, 2008 2:09 PM
10g增强，已经不能通过远程来关闭监听器。
Posted by: eygle at July 3, 2008 3:05 PM
