Error attepting to connect to PPTP VPN on W2K Server running RRAS.

Posted on 2004-04-26
Last Modified: 2010-04-12
I am trying to implement a VPN PPTP server on Win2K server using RRAS in a workgroup. AD is not installed. The system has 2 NICs. The first one is connected directly to the internet and has a public IP address via DHCP. The second NIC is connected via another ISP using a Netopia router that is mapping public IPs to the private internal addresses it is assigning via DHCP. It has no security. At present this nic has a address and a public address is mapped to it. My problem is when I try to connect using a Win2K pro workstation remotely through the 1st NIC, it begins authentication and then stops responding and gives a 721 error. Please advise.
Question by:rwjean
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 2
LVL 11

Expert Comment

ID: 10963576
Make sure the firmware on the netopia is up to date.
LVL 11

Expert Comment

ID: 10963583
Also make sure vpn passthrough is enabled on the remote connection router.

Author Comment

ID: 10966006
The router is utilizing IP maps which map the public IPs to the private internal addresses. So in my case, the public IP is mapped to There is no blocking of ports whatsoever. The machine at that address is wide open.
Save the day with this special offer from ATEN!

Save 30% on the CV211 using promo code EXPERTS30 now through April 30th. The ATEN CV211 connects a laptop directly to any server allowing you instant access to perform data maintenance and local operations, for quick troubleshooting, updating, service and repair.

LVL 11

Expert Comment

ID: 10981626
I thought the first nic was connected directly to the internet? You are running no domain just workgroup?

Author Comment

ID: 10989011
The first nic has a public address via dhcp from Comcast. The second is statically assigned an address and the router does a static IP map to that address.
LVL 11

Accepted Solution

ewtaylor earned 300 total points
ID: 10989108
Are you running service pack 3 or 4 on the client? I wonder if you are connecting via the comcast interface and the server is replying via the netopia interface, the vpn client sees this as a different ip address and drops the packet.  Kind of like this situation

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Like many others, when I created a Windows 2008 RRAS VPN server, I connected via PPTP, and still do, but there are problems that can arise from solely using PPTP.  One particular problem was that the CFO of the company used a Virgin Broadband Wirele…
Let’s list some of the technologies that enable smooth teleworking. 
After creating this article (, I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
Windows 10 is mostly good. However the one thing that annoys me is how many clicks you have to do to dial a VPN connection. You have to go to settings from the start menu, (2 clicks), Network and Internet (1 click), Click VPN (another click) then fi…
Suggested Courses

752 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question