因單位需要新購置了一臺HP 服務器來采集多個數(shù)據(jù)庫的數(shù)據(jù)，安裝了WIN 2008 R2 64位系統(tǒng)，安裝ORACLE客戶端后拷貝已有的tnsnames.ora文件，發(fā)現(xiàn)tnsnames.ora中某個連接報ORA-12537: TNS: 連接關閉。而其余幾個都可以正常連接。但這個連接失敗的服務器在其他電腦（win2003 32位+32位oracle 9i客戶端）上卻可以正常的連接上。我在這個新機器上先后安裝了win32_11gR2_client、win64_11gR2_client都是報同樣的錯誤。下面是幾個相關的配置文件
1、tnsnames.ora文件
# tnsnames.ora Network Configuration File: D:\app\Administrator\product\11.2.0\client_1\NETWORK\ADMIN\tnsnames.ora

# Generated by Oracle configuration tools.

WG =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.8)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = infodb)
)
)

WG2 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.2.6)(PORT = 11521))
)
(CONNECT_DATA =
(SERVICE_NAME = nb.infodb)
)
)

# WG是可以正常連接的，WG2卻報ORA-12537: TNS: 連接關閉

2、sqlnet.ora文件
# sqlnet.ora Network Configuration File: D:\app\Administrator\product\11.2.0\client_1\network\admin\sqlnet.ora
# Generated by Oracle configuration tools.

# This file is actually generated by netca. But if customers choose to
# install "Software Only", this file wont exist and without the native
# authentication, they will not be able to connect to the database on NT.

SQLNET.AUTHENTICATION_SERVICES= (NTS)

NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)

2008的防火墻也關閉了，還是沒有解決。
這個問題已經困擾了我好多天，急切盼望高人指點迷津。拜謝了。。。