公司伺服器週末要加硬碟，週一來後應用連不上了。報錯如下報錯： ORA-12170:TNS connect timeout occurred

第一反應是監聽沒開：

1. 測試了一下， 連線超時沒用ping 通

C:\Users\Administrator>tnsping brorcl

TNS Ping Utility for 64-bit Windows: Version 11.2.0.1.0 - Production on 15-6月 -2015 09:45:43

Copyright (c) 1997,2010,Oracle. All rights reserved.

已使用的引數檔案:

D:\oracle\product\11.2.0\dbhome_1\network\admin\sqlnet.ora

已使用 TNSNAMES 介面卡來解析別名

嘗試連線 (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.14.147.112)(PORT = 42525)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = brorcl)))
TNS-12535: TNS: 操作超時

2. 我登陸到遠端伺服器上，查看了一下監聽的狀態

C:\Documents and Settings\Administrator>lsnrctl status

LSNRCTL for 64-bit Windows: Version 11.2.0.1.0 - Production on 15-6月 -2015 09:52:54

Copyright (c) 1991,Oracle. All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for 64-bit Windows: Version 11.2.0.1.0 - Production
Start Date 15-6月 -2015 09:36:02
Uptime 0 days 0 hr. 16 min. 55 sec

Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File F:\app\Administrator\product\11.2.0\dbhome_1\network\admin\listener.ora
Listener Log File F:\app\Administrator\product\11.2.0\dbhome_1\network\log\listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC1521ipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=x3650m3)(PORT=47512)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=47512)))
Services Summary...
Service "BANKASSIST" has 1 instance(s).
Instance "brorcl",status READY,has 1 handler(s) for this service...
Service "CLRExtProc" has 1 instance(s).
Instance "CLRExtProc",status UNKNOWN,has 1 handler(s) for this service...
Service "brorcl" has 2 instance(s).
Instance "brorcl",has 1 handler(s) for this service...
Instance "brorcl",has 1 handler(s) for this service...
Service "brorclXDB" has 1 instance(s).
Instance "brorcl",has 1 handler(s) for this service...
The command completed successfully

看到監聽也正常，本地連線進去也很正常。

3. 我想了一下本地能訪問遠端連線不上是不是防火牆問題，於是我關閉了windows防火牆，果然在遠端tnsping 能ping通了；

4. 結果：應該是防火牆有改動了，最後把 伺服器防火牆的 ip和埠新增為例外，應用恢復正常了。

總結：

一般遇到tns 的問題通常都是監聽或者是網路問題

1. 檢視監聽是否正常
2. 檢視 ip 或埠有沒有改動
3. 檢視防火牆

以上所述是小編給大家介紹的解決ORA-12170:TNS connect timeout occurred問題，希望對大家有所幫助！