Remote Desktop突然不能用了 “This could be due to CredSSP encryption oracle remediation”


一段時間沒有用RDP去連遠程的Windows主機,某一天突然發現用不了了。

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錯誤信息如下:

An authentication error has occurred.
The function requested is not supported

Remote computer: 10.2XX.XXX.XXX
This could be due to CredSSP encryption oracle remediation.
For more information, see https://go.microsoft.com/fwlink/?linkid=866660


查了點資料,發現這是由於安裝了KB4103727(Windows 10 Version 1709) 或者KB4103718 (Windows 7),其目的是修復了一些安全方面的問題。但是,副作用就是導致了RDP不能用了。


有四個解決方案。筆者試驗了第二個,修改group policy,成功的解決了這個問題。


具體步驟如下:

運行: gpedit.msc

打開 Computer Configuration -> Administrative Templates -> System -> Credentials Delegation -> Encryption Oracle Remediation

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打開Encryption Oracle Remediation, 選擇Enable,然后修改protection level 為Vulnerable,點Apply。

image


問題解決。


參考資料

==============

[Solved] RDP Authentication Error Function Requested Is Not Supported

https://www.itechtics.com/solved-authentication-error-function-requested-is-not-supported/

Remote Desktop Authentication Error Has Occurred. The function requested is not supported.

https://social.technet.microsoft.com/Forums/Lync/en-US/46e1cd52-52b3-4427-88a3-200f87319e23/remote-desktop-authentication-error-has-occurred-the-function-requested-is-not-supported?forum=w7itpronetworking


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