ORA-12571: TNS: Packet writer failure

ORA-12571: TNS: Package writer failure

ORA-12571: TNS ORA-12571: TNS: packet Rewriting failed This error occurs as follows: Case 1: Environment configuration: Win2000 Server and Oracle 9i Description: After the system is installed on the machine, oracle9i is installed, the database is successfully set up, and the service is activated. After testing, the connection can be established. Then add the machine to the domain, then use the domain account to enter the system, and then connect to the database ORA-12571: TNS: packet Rewriting failed ". Case 2: Environment configuration: Win2000 Server, Oracle 9i Description: After the system is installed on the machine, add the machine to the domain, log on to the system with the domain account, install Oracle9i, and set up the database." ORA-12571: TNS: packet Rewriting failed ". After querying information and solutions on the network, the possible causes of the problem are initially obtained: 1. If you want to access the database through the firewall, the firewall's wrong configuration may cause Oracle connection to be disconnected. When you detect a listener on port 1521, the listener ignores your connection and only concentrates on a server process. You can use a new and random port to communicate with the server process. The firewall may block the communication between the new port. This may affect your connection. 2. problems may occur due to network interruptions. 3. When the probe software or personal firewall on the workstation inadvertently results in your network Luotong An error occurred. This problem can be solved by deleting the probe software or configuring the Personal Firewall correctly. 4. Incorrect configuration of the sqlnet. ora file may also cause problems. Delete sqlnet. expire _ from the sqlnet. ora file on your client and your database server _ Time = 0. Source: Http://searchdatabase.techtarget.com.cn/118/1900118.shtml Based on the above reasons, the problem was detected, and the problem finally occurred in the configuration of the sqlnet. ora file. My sqlnet. ora file does not contain sqlnet. expire _ Time = 0. Sqlnet. Authentication _ Services = (NT) changed to sqlnet. Authentication _ Services = (None ). Solve the problem!