Data Encryption Causes RAS NetBIOS Error 640 Error Message
Article ID: 132169
Article Last Modified on 12/5/2003
APPLIES TO
- Microsoft Windows NT Workstation 3.5
- Microsoft Windows NT Workstation 3.51
- Microsoft Windows NT Server 3.5
- Microsoft Windows NT Server 3.51
- Microsoft Windows for Workgroups 3.11
This article was previously published under Q132169
SYMPTOMS
If you attempt to connect to a Windows NT 3.5 or 3.51 RAS server with a
Windows for Workgroups 3.11 RAS client, and you have selected Require Data
Encryption, the following error appears:
NETBIOS error 640: a netbios error has occurred
(with failed code 0xa)
CAUSE
Windows for Workgroups version 3.11 was released before the development of
RAS data encryption in Windows NT version 3.5 and 3.51. Because Windows for
Workgroups RAS cannot negotiate this encryption it displays the error.
For information on other causes of Error 640, see the following article in
the Microsoft Knowledge Base:
111094 RAS ErrMsg: NETBIOS Error 640: A Netbios Error Has Occurred...
WORKAROUND
Disable the "Require data encryption" option under the Encryption settings
in the Network Configuration dialog of the Remote Access Setup window.
Click Configure after you select Remote Access Service in Control Panel
Network to view the Network Configuration dialog.
Additional query words: prodnt 3.11 wfw wfwg access denied
Keywords: KB132169