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04.22.2008 at 08:01AM PDT, ID: 23343181
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Cannot connect to VPN on Windows 2003 Enterprise R2 Server.  Client receives VPN connection error 733.  Server receives VPN event id 20050

Asked by pankis in Virtual Private Networking (VPN), Windows 2003 Server

Tags: TCP/IP CP reported error 733: A connection to the remote computer could not be completed. You might need to adjust the protocols on this computer., Event 20050: The User DOMAIN\username connected to port VPN4-23 has been disconnected because no network protocols were successfully negotiated

When a user tries to connect using Windows XP, he gets as far as registering computer on the network, then: TCP/IP CP reported error 733: A connection to the remote computer could not be completed.  You might need to adjust the protocols on this computer.

On the server, Event 20050 occurs, saying The User DOMAIN\username connected to port VPN4-23 has been disconnected because no network protocols were successfully negotiated.

These errors occur whether we are attempting a connection from internal, or external, so it does not appear to be firewall related.

We updated a few nights ago, 4/22/2008, applying all Windows updates from the last month.
Prior to doing this, the VPN connection itself was working great.  We thought this was the culprit.

We have uninstalled all updates applied 4/22, and no change in the results.

Server: Windows 2003 Enterprise R2
Clients:  Windows XP Pro, Windows Vista Business

What troubleshooting steps should I take?
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[+][-]04.22.2008 at 09:56AM PDT, ID: 21413080

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[+][-]04.22.2008 at 11:00AM PDT, ID: 21413735

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[+][-]04.22.2008 at 11:11AM PDT, ID: 21413826

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[+][-]04.22.2008 at 11:39AM PDT, ID: 21414074

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[+][-]04.22.2008 at 11:43AM PDT, ID: 21414115

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[+][-]04.22.2008 at 12:00PM PDT, ID: 21414263

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[+][-]04.29.2008 at 12:21PM PDT, ID: 21465246

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About this solution

Zones: Virtual Private Networking (VPN), Windows 2003 Server
Tags: TCP/IP CP reported error 733: A connection to the remote computer could not be completed. You might need to adjust the protocols on this computer., Event 20050: The User DOMAIN\username connected to port VPN4-23 has been disconnected because no network protocols were successfully negotiated
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Solution Provided By: pankis
Participating Experts: 1
Solution Grade: A
 
 
 
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