VPN server is not configured to allow Generic Routing Encapsulatio

[Ana]

Hi,

I am away from home and connected via a public wireless to the internet.
(first time, I always connect from home). When trying to conect to internal
server via IT connection manager, I get error 806:
The VPN connection between your computer and the VPN server could not be
completed. The most common cause for this failure is that at least one
Internet device (for example, a firewall or a router) between your computer
and the VPN server is not configured to allow Generic Routing Encapsulation
(GRE) protocol packets. If the problem persists, contact your network
administrator or Internet Service Provider. (Error 806) For customized
troubleshooting information for this connection

I could not find any usefull information on it manager help page.

Does anybody know what do I have to do in order to be able to connect
successfully? Thank you!!

 

[Robert L. \(MS-MVP\)]

As it said, it is GRE issue. You need to make sure GRE port is open for pass
through. Or this search result may help.

ras error codeError 797 Error 781 Error 783 Error 800 Error 806 - the VPN
connection ..... Error 806: a connection between your computer and the VPN
server has been ...
www.chicagotech.net/raserrors.htm


--
Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on
http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on
http://www.HowToNetworking.com

 

[Sooner Al [MVP]]

The PPTP VPN server your trying to connect to is probably behind a
firewall/router that is not passing GRE Protocol 47 traffic.

PPTP VPN needs both TCP Port 1723 open on the firewall/router and the device
needs to be able to pass GRE Protocol 47 traffic. If its a consumer grade
router that can sometimes be problematic. Some routers can be enabled by
configuring for "PPTP Pass Through" or "VPN Pass Through" or automatically
pass GRE Protocol 47 traffic if TCP Port 1723 is opened. Consult the owners
manual for the router. Sometimes a firmware upgrade will fix the issue and
sometimes not.

If the PPTP VPN sever is behind a router on a corporate network contact the
network administrators.

You can test this by running the tests detailed in the "PPTP Ping" and "VPN
Traffic" sections on this page.

http://technet.microsoft.com/en-us/library/bb877965.aspx

See the last part of this page for help getting the test software on your
Vista PC.

http://theillustratednetwork.mvps.org/Vista/PPTP/PPTPVPN.html

--

Al Jarvi (MS-MVP Windows – Desktop User Experience)

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