When connecting from a Windows 5.x client to a Windows 4.x server using GSSAPI authentication, if authentication fails although GSSAPI has been correctly configured, you may have to disable the LMHOSTS lookup on the client-side computer. Follow these instructions:
Select Control Panel → Network Connections.
In Local Area Connection, right-click and select Properties.
In the Local Area Connection Properties dialog box, General tab, select Internet Protocol (TCP/IP) and click the Properties button.
In the Internet Protocol (TCP/IP) Properties dialog box, in the General tab, click the Advanced... button.
In the Advanced TCP/IP Settings dialog box, in the WINS tab, clear the Enable LMHOSTS lookup check box.
Restart the client-side computer.
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