限制登录Oracle的IP地址有两种方法
一、编辑$ORACLE_HOME/network/admin/sqlnet.ora，增加
tcp.validnode_checking = yes
#tcp.invited_nodes=() #允许访问的IP列表，各IP之间用逗号分隔
tcp.excluded_nodes=() #限制访问的IP列表，个IP之间用逗号分隔
注意：
不能同时使用tcp.invited_nodes和tcp.excluded_nodes
只能指定具体的IP地址，不能指定IP段
只能限制TCP协议
需要重启监听生效
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1、需求：限制IP 192.168.137.1登录
2、实现方式：
oracle@oracle[/oracle/app/10g]> cd $ORACLE_HOME/network/admin
oracle@oracle[/oracle/app/10g/network/admin]> ls -l
total 16
drwxr-x--- 2 oracle oinstall 4096 Dec 30 11:37 samples
-rw-r----- 1 oracle oinstall 172 Dec 26 2003 shrept.lst
-rw-r--r-- 1 oracle oinstall 236 Dec 30 13:10 sqlnet.ora
-rw-r--r-- 1 oracle oinstall 347 Mar 25 21:22 tnsnames.ora
oracle@oracle[/oracle/app/10g/network/admin]> vi sqlnet.ora
# sqlnet.ora Network Configuration File: /oracle/app/10g/network/admin/sqlnet.ora
# Generated by Oracle configuration tools.
SQLNET.RECV_TIMEOUT = 0
SQLNET.EXPIRE_TIME = 0
SQLNET.SEND_TIMEOUT = 0
SQLNET.INBOUND_CONNECT_TIMEOUT = 0
tcp.validnode_checking = yes
#tcp.invited_nodes=()
tcp.excluded_nodes=(192.168.137.1)
oracle@oracle[/oracle/app/10g/network/admin]> lsnrctl stop
LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 15-JUN-2009 12:10:05
Copyright (c) 1991, 2005, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
The command completed successfully
oracle@oracle[/oracle/app/10g/network/admin]> lsnrctl start
LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 15-JUN-2009 12:10:17
Copyright (c) 1991, 2005, Oracle. All rights reserved.
Starting /oracle/app/10g/bin/tnslsnr: please wait...
TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Log messages written to /oracle/app/10g/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=oracle)(PORT=1521)))
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Start Date 15-JUN-2009 12:10:17
Uptime 0 days 0 hr. 0 min. 0 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Log File /oracle/app/10g/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=oracle)(PORT=1521)))
The listener supports no services
The command completed successfully
在192.168.137.1上登录，显示
ORA-12547：TSN：丢失连接