Kerberos authentication windows 2008 r2

This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully.

For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, see How to back up and restore the registry in Windows. For Windows clients that support channel binding that are failing to be authenticated by non-Windows Kerberos servers that do not handle the CBT correctly:.

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 For more information, see ignore incoming channel binding if acceptor does not set one.

Using Kerberos authentication within a domain or in a forest allows the user or service access to resources permitted by administrators without multiple requests for credentials. After initial domain sign on through Winlogon, Kerberos manages the credentials throughout the forest whenever access to resources is attempted. As a result, in Windows operating systems, the Kerberos protocol lays a foundation for interoperability with other networks in which the Kerberos protocol is used for authentication.

In addition, Microsoft publishes Windows Protocols documentation for implementing the Kerberos protocol. The documentation contains the technical requirements, limitations, dependencies, and Windows-specific protocol behavior for Microsoft's implementation of the Kerberos protocol.

Before Kerberos, NTLM authentication could be used, which requires an application server to connect to a domain controller to authenticate every client computer or service. With the Kerberos protocol, renewable session tickets replace pass-through authentication. The server is not required to go to a domain controller unless it needs to validate a Privilege Attribute Certificate PAC. Instead, the server can authenticate the client computer by examining credentials presented by the client.

NOTE] Authentication errors may occur on a domain controller after the domain functional level is raised to Windows Server or higher if the domain controller has already replicated the DFL change but has not yet refreshed the krbtgt password. In this case, a restart of the KDC service on the domain controller will trigger an in-memory refresh of the new krbtgt password and resolve related authentication errors.

Last Interactive Logon Information displays the following information:. Fine-grained password policies make it possible for you to specify password and account lockout policies for users and global security groups in a domain.

Skip to content. Star 1k. Permalink main. Branches Tags. Users must explicitly link their Windows user account to an online ID to support this authentication. Introducing the Windows Biometric Service.

In Windows Server R2 and Windows 7, administrators and users use fingerprint biometric devices to log on to computers and perform basic management of the fingerprint devices. Users might require elevation of permissions through User Account Control. Administrators can manage fingerprint biometric devices in Group Policy settings by enabling, limiting, or blocking their use.

Extended Protection was introduced in Windows Server R2 and Windows 7 but still available for some earlier versions of Windows and Windows Server.

For information about how to update these older systems, see Extended Protection for Authentication. Windows Vista includes a Backup and Restore Wizard that lets users back up user names and passwords that they have requested Windows to remember for them. This new functionality lets users restore the user names and passwords on any computer running Windows Vista. Restoring a backup file on a different computer lets users effectively roam or move their saved user names and passwords.

By using Credential Security Service Provider CredSSP , applications can delegate user credentials from the client computer by using the client-side security service provider to the target server through the server-side security service provider that is based on client policies.

CredSSP policies are configured through Group Policy, and delegation of credentials is turned off by default in this version of Windows Server. To ease the process of bulk encryption, cipher suites that support AES have been added.