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RE: VPN Error 733, Event Log Error 20050 with SBS 2003

RRAS, VPN, TS/RDP, Routing and remote Access.

RE: VPN Error 733, Event Log Error 20050 with SBS 2003

Postby MSFT » Wed Dec 06, 2006 5:35 pm

Hello Nick,

Thank you for posting here.

First please open Routing and Remote Access console. Right-click the Server
Name and choose 'Disable Routing and Remote Access' option. This option
will remove all current RRAS configurations and stop the service.

Second, please rerun the CEICW via follow page:

825763 How to configure Internet access in Windows Small Business Server

Third, open Server Management console and navigate to 'Internet and E-mail'
snap-in. Click 'Configure Remote Access' to enable the VPN service. Will
the problem be resolved?

If the issue persists, I'd like to give you some other steps to try:

The problem might occur if all the following conditions are true:

1. The RRAS Server's network card is configured as a DHCP client.

2. The RRAS Service is configured to obtain addresses from DHCP for VPN and
dial up clients.

3. There is a reservation on the DHCP Server running on a third party
device with a reservation for the RRAS Server.

Remove the reservation on the third party device for the RRAS Server.

If the Routing and Remote Access Server had a static IP address for its LAN
adapter. However, the DHCP scope for the LAN included the server's IP
address, and there was no exclusion range configured. The DHCP server then
assigned the RRAS server's LAN IP address to one of the VPN ports.
Therefore, the server had duplicate IP addresses for its LAN and PPP
adapters, and this caused VPN connections to fail. It also caused other
networking services and programs on the server to fail. For example, the
server was not able to browse the Web after a VPN failure and did not
respond to DNS queries.

The following steps resolved the problem:

1. Added an exclusion range in the DHCP scope to exclude the server's LAN
IP address from the addresses assigned to DHCP clients

2. Removed the DHCP address leases for the VPN ports

3. Restarted the Routing and Remote Access service

If VPN client has install IPX/SPX protocols, please remove IPX/SPX from the
RAS client, and remote mappings from the client machine.

If the issue persists, please kindly help me collect some information for
further investigation:

Is ISA installed on this SBS server? Which version ISA is?

Hope these steps will give you some help.

Thanks and have a nice day!

Best regards,

Terence Liu(MSFT)

| Hi,
| Unfortunatly my previous thread has been buried since it was posted...
| 24 hours ago, so if I could draw your large and knowledgable brains
| over here
http://groups.google.co.uk/group/micros ... bs/browse_

| A brief summary.
| I have a Windows SBS 2003 sat on my network with an internal address
| with port 1723 NAT'ed to our external static ip address on the router.
| Likewise GRE is forwarding on the router, a Zyxel Prestige 660R-61C
| (although I have previously tied using a Cisco 877).
| I have run through the remote access wizard in order to enable VPN
| access however whenever clients try to connect, the connection "seems"
| to start working (Verifing Username/ Password, Registering your
| computer on the network) then stops with "TCP/ IP CP reported error
| 733. The connection to the remote computer could not be completed. You
| may need to adjust the protocols on this computer..." This problem
| also occurs when directly on the LAN from any number of clients... the
| problem is almost certainly with the server
| I have re-run through setting up Routing and Remote Access, and have
| assigned a pool of addresses for VPN connections outside of the servers
| DHCP range as per the advice on www.chicagotech.net but this does not
| seem to have fixed the problem. Likewise I have enabled all
| In my event log I get Remote Access Error 20050, the user connected to
| the porthas been disconnected because no network protocols were
| sucessfully negotiated.
| When testing using the PPTPSVR/CLNT tools on the installation CD the
| server sucessfully received the test message, but the client didn't get
| any message back.
| The RRAS logs are also available on the old thread.
| Thanks for your help!
| Nick
Posts: 10
Joined: Wed Dec 06, 2006 4:56 pm

Postby netman06 » Sun Jun 22, 2008 12:34 am

choose 'Disable Routing and Remote Access' option. This option
will remove all current RRAS configurations and stop the service.

I performed this procedure and I was wondering if there any way to recover these settings.

After you have re-setup everything again?


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Joined: Sat Jun 21, 2008 8:31 am

Postby chicagotech » Sun Jun 22, 2008 10:29 am

I don't think you can recover the settings except you export it before.
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
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Postby netman06 » Sun Jun 22, 2008 8:48 pm

Sounds like IIS. Ok well just a shoot in the dark.


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