![]() ![]() For more information, see ignore incoming channel binding if acceptor does not set one. There is a known issue with Sun Java which has been addressed to accommodate the option that the acceptor might ignore any channel bindings supplied by the initiator, returning success even if the initiator did pass in channel bindings as per RFC 4121. This will configure Kerberos never to emit CBT tokens. If that does not resolve the problem, then set the registry entry value to 0x03.This will configure Kerberos not to emit CBT tokens for unpatched applications. Key name: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\LSAįor Windows clients that support channel binding that are failing to be authenticated by non-Windows Kerberos servers that do not handle the CBT correctly:.To control the extended protection behavior, create the following registry subkey: For more information about how to back up and restore the registry, see How to back up and restore the registry in Windows. Then, you can restore the registry if a problem occurs. For added protection, back up the registry before you modify it. Therefore, make sure that you follow these steps carefully. However, serious problems might occur if you modify the registry incorrectly. This section, method, or task contains steps that tell you how to modify the registry. Resolutionįor failures where non-Windows NTLM or Kerberos servers are failing when receiving CBT, check with the vendor for a version that handles CBT correctly.įor failures where non-Windows NTLM servers or proxy servers require LMv2, check with the vendor for a version that supports NTLMv2. NTLM and Kerberos provide additional information in their messages to support this functionality.Īlso, Windows 7 and Windows 2008 R2 computers disable LMv2. ![]() Also when the authentication takes place inside a Transport Layer Security (TLS) channel, it can be bound to that channel. When a client attempts to connect to a server, the authentication request is bound to the Service Principal Name (SPN) used. ![]() This feature enhances the protection and handling of credentials when authenticating network connections using Integrated Windows Authentication (IWA). Windows 7 and Windows Server 2008 R2 support Extended Protection for Integrated Authentication. NTLM authentication failures when there's a time difference between the client and DC or workgroup server.NTLM authentication failures from non-Windows NTLM servers.NTLM authentication failures from Proxy servers.Windows clients that support channel binding fail to be authenticated by a non-Windows Kerberos server.You may experience one or more of the following symptoms: Windows 7 and Windows Server 2008 R2 support Extended Protection for Integrated Authentication that includes support for Channel Binding Token (CBT) by default. This is caused by differences in the way that Channel Binding Tokens are handles.Īpplies to: Windows 7 Service Pack 1, Windows Server 2012 R2 Original KB number: 976918 Symptoms This article provides a solution to several authentication failure issues in which NTLM and Kerberos servers can't authenticate Windows 7 and Windows Server 2008 R2-based computers.
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