The quick solution is to patch your host from one of the patches here Remote computer: This could be due to CredSSP encryption oracle remediation If you’re like me, you have encountered this error remoting into one of your servers.Īn Authentication error has occurred. The function requested is not supported. To learn more about the CredSSP patch and find Oracle support, visit. Updating the key is a temporary workaround until patching can be completed on your 2012/2016 servers. Once the server side patching is done it will need to be removed or changed to a value of 0 (enforced). The key can be pushed via GPO or done individually by hand on each workstation. HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\CredSSP\ParametersĪdd a DWORD value of 2: "AllowEncryptionOracle" Add the following registry key with a DWORD value of 2: In the short term, you can apply a registry fix on the WORKSTATION that cannot connect. The long-term fix is to patch all 2012/2016 servers with the patch released in March. Though it looks like a server-side issue, the patch is actually on the client/workstation side. It will refuse to connect to any server which does not have the patch. In May, Microsoft pushed a patch to all workstation OS to enforce this server-side patch. The new error message, added by Microsoft on May 8, 2018, indicates a specific patch issue.Ī security update to address a remote code execution vulnerability was pushed to Server 2012/2016 in March 2018. The issue generally impacts Windows Server 2012/2016. You may see this authentication error when attempting to log in to a server using RDP (Remote Desktop).
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