\oracle\product\10.2.0\db_1\NETWORK\ADMIN
tnsnames.ora 文件中修改。
如： 添加這個文件
ORCL （這個不重複）=
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = x.x.x.x)(PORT = xxxx))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = ORAS)
)
)