Microsoft KB Archive/259992

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Error Message: Error 781 Encryption Failed Because No Valid Certificate Was Found

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The information in this article applies to:


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Professional

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SYMPTOMS
When you try to establish a Virtual Private Networking (VPN) connection to a VPN server, you receive the following error message:

Error 781

Encryption failed because no valid certificate was found.

This behavior occurs when you try to use a new connection that is established by the Network Connection Wizard, or when you try to use an existing connection that worked in the past.

CAUSE
This behavior is caused by an incomplete network connection between the VPN client computer and the VPN server.

RESOLUTION
To resolve this issue, use the following general troubleshooting methods:


 * Test basic network connectivity between the client and the server.
 * Test name resolution between the client and the server.
 * Use the Networking and TCP/IP troubleshooter in Windows 2000 Help.

STATUS
This behavior is by design.

MORE INFORMATION
This error message can be displayed for numerous reasons, including incorrect Domain Name Service (DNS) entries, a downstream modem on a network that does not dial the server on demand, line noise on a dial-up connection, or intermittent outages at your Internet service provider (ISP) or VPN server.

For additional information about troubleshooting TCP/IP problems, click the article number below to view the article in the Microsoft Knowledge Base:

"Q169790 How to Troubleshoot Basic TCP/IP Problems in Windows NT 4.0" Additional query words:

Keywords : kberrmsg kbnetwork kbtool

Version : WINDOWS:2000

Platform : WINDOWS

Issue type : kbprb

Technology : kbvcSearch