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VPN Error Code 720

Error registering your computer

A connection to the remote computer could not be established

I have a XP pro laptop that connects to a windows 2003 server running rras.  I cannot connect to the server with this laptop.  I get the error:

Registering your computer on the network...

Error 720: A connection to the remote computer could not be established.  You might need to change the network settings for this connection.

I have searched for days for an answer and have only found two instances of this problem and both people gave up and reformatted - not an option here.

The connection works fine on any other desktop or laptop which leads me to believe the settings on the server (username, password, etc.) are correct.

The laptop will not connect when connected via the wireless LAN to the internet or the wired network card.

I have reset ip (since I cannot uninstall in XP pro).  I have recreated the id on the server.  I have updated all service packs from Microsoft.  I have updated the driver to the Intel network cards in the laptop.  I have run xp tcp/ip repair utility.  I have looked in the event log of both the server and the laptop - nothing appears.  I am running tcpip and client for Microsoft networks and have made sure they are checked in the connection properties.  


This seems to be a rare case and I am not sure the error is the actual error that is causing the problem.

 

A: VPN error 720 is protocol issue. I would double-check protocol configuration in both sites. These search result may help,

Error 720 - No PPP Control Protocols Configured. Symptom: When attempting to establish a VPN connection to Windows RRAS, you may receive the following error ...
http://www.chicagotech.net/VPN/error720.htm - Similar pages


ras error code
Error 682 Error 691 Error 711 Error 720 Error 721 VPN Error 732: The PPP negotiation is not ... Error 720: No PPP control protocols configured. Resolution: ...
http://www.chicagotech.net/raserrors.htm

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

Q2: I finally worked this out:

Follow these instructions in step One: (Don't worry about uninstalling TCPIP.)

http://support.microsoft.com/default.aspx?scid=kb;en-us;810979.

I removed WAN Miniport (IP) and WAN Miniport (pptp)

No need to test in the last step - still did not work.

Follow these instructions in step two:

Find netrasa in c:\windows\inf
     Open and place a semicolon in front of the line that starts "Excludefromselect=\" and end with "MS_NdisWanNbfIn,MS_NdisWanNbfOut" under the [ControlFlags] section. (all lines between)

Follow these steps for step Three:
     Start a Add new hardware session and choose that the hardware is already installed.  Choose to "Add New Hardware" and then select "Network Adapters" followed by "Microsoft" and then both the PPTP and the IP Wan miniport one at a time.  (NO need to reboot between these steps)

After you finish both then reboot.

Run the xp tcpip repair utility from your favorite download site and choose to "Reset TCP/IP"

Reboot and try your VPN connection.

Hope this saves someone time in the future.

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