Error Message: VPN Connection Error 800: Unable to Establish Connection (319108)
The information in this article applies to:
- Microsoft Windows XP Home Edition
- Microsoft Windows XP Professional
This article was previously published under Q319108 SYMPTOMS
When you try to establish a virtual private network (VPN) connection, you may receive the following error message:
Error 800: Unable to establish connection
CAUSE
This issue may be caused by a router that has outdated firmware. For example, this issue may occur if you are using a Cisco router with firmware that is dated 2000 or earlier.
To verify that this is the cause, look at a network trace. The Cisco device advertises a 0 window size in the TCP handshake on port 1723.
RESOLUTION
To resolve this issue, contact the manufacturer of the router for possible upgrades.
For information about how to contact the manufacturer, click the appropriate article number in the following list to view the article in the Microsoft Knowledge Base: 65416 Hardware and Software Third-Party Vendor Contact List, A-K
60781 Hardware and Software Third-Party Vendor Contact List, L-P
60782 Hardware and Software Third-Party Vendor Contact List, Q-Z
| Modification Type: | Minor | Last Reviewed: | 11/4/2003 |
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| Keywords: | kberrmsg kbprb KB319108 |
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