Event Type: Warning
Event Source: Rasman
Event Category: None
Event ID: 20209
Date:  4/16/2007
Time:  4:51:39 PM
User:  N/A
Computer: EXCHANGE01
Description:
A connection between the VPN server and the VPN client 71.106.9.158 has been established, but the VPN connection cannot be completed. The most common cause for this is that a firewall or router between the VPN server and the VPN client is not configured to allow Generic Routing Encapsulation (GRE) packets (protocol 47). Verify that the firewalls and routers between your VPN server and the Internet allow GRE packets. Make sure the firewalls and routers on the user's network are also configured to allow GRE packets. If the problem persists, have the user contact the Internet service provider (ISP) to determine whether the ISP might be blocking GRE packets.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.