ORA-12638:身份證明檢索失敗的解決辦法

the NTS option makes the Oracle client attempt to use your current Windows domain credentials to authenticate you with the Oracle server. This could fail for a couple of reasons:

- The Oracle server is not configured to support Windows authentication
- The credentials you use to login to your local machine are not sufficient to allow you to login to the server.

In my case, it was the later. Despite the fact that I had told the client to use a different user name and password, it was still attempting to login using my domain credentials first. This failed because I was logged on to my local machine using my normal domain credentials rather than my administrator account.

Replacing the line:

SQLNET.AUTHENTICATION_SERVICES= (NTS)

with

SQLNET.AUTHENTICATION_SERVICES= (NONE)

in sqlnet.ora resolved the issue by disabling local support for authenticating using Windows credentials.

ORA-12638: 身份證明檢索失敗 的解決辦法

今天在使用應用程序連接Oracle時碰到了 “ORA-12638: 身份證明檢索失敗” 錯誤，到網上搜索了一下，是因為Oracle的高級安全性驗證導致，解決辦法如下：

開始 -> 程序 -> Oracle -> Configuration and Migration Tools ->
Net Manager→本地→概要文件→Oracle高級安全性→驗證→去掉所選方法中的 "NTS" 就可以了.