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    [实例讲解Oracle监听口令及监听器安全]买监听器监听老公怎么安装不易察觉

    时间:2018-08-15 16:37:19 来源:精彩博文网 本文已影响 精彩博文网手机站

    很多人都知道,Oracle的监听器一直存在着一个安全隐患,假如不设置安全措施,那么能够访问的用户就可以远程关闭监听器。

    相关示例:

    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

    大家可以发现,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

    为了更好的保证监听器的安全,大家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

    在我们设置密码后,远程操作将会因缺失密码而出现失败:

    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

    注意:此时在服务器端或客户端,都需要我们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

    另外,ADMIN_RESTRICTIONS参数也是一个重要的安全选项,大家可以在 listener.ora 文件中设置 ADMIN_RESTRICTIONS_ 为 ON,此后所有在运行时对监听器的修改都将会被阻止,所有对监听器的修改都必须通过手工修改listener.ora文件才能顺利完成。

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