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Cannot access VPN, error 650

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by tmarch

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I receive error 650 after the 'Verifying username and password" step when trying to connect to a VPN on an NT 4 server from both an NT 4 workstation client and a Windows Me client. Both connections worked the week before. The NetAdmin added a local workstation to the network at the office but assured me that it should not have affected the VPN in any way. The NT workstation error message includes a fail code 0x14. The NetAdmin had me reinstall service pack 4 on my NT machine (didn't help). Nothing else has been changed on either of my home machines.

4 replies

by nettek

This is either a corrupted modem driver on your RAS server, or your RAS server is using a US Robotics INT PNP modem using the driver that is included with NT. Try downloading and installing the latest modem driver on your RAS server (if you have a US Robotics modem, drivers are available from 3Com).

by izz

Error 650: The Remote Access Server is not responding
If you receive this error message, disable PPTP filtering and then attempt to ping the PPTP server. To disable PPTP filtering, type the following command on the PPTP server:

NET STOP RASPPTPF

You should now be able to ping the PPTP server over the Internet. If you still receive one of these error messages, the problem may not be a PPTP problem. Until you get replies from the server, you will need to troubleshoot this issue as a normal connectivity problem.
If pinging the PPTP server across the Internet successfully returns with replies, the ISP or internal corporate network may not allow Generic Routing Encapsulation (GRE) packets or PPTP packets to go across the firewall or router.
GRE packets are commonly used internally as messages between routers. For example, an ISP may use GRE to distribute routing messages between its sites. For security or other reasons, this ability may be turned off to the outside Internet.You can resolve this problem by ensuring that Protocol 47 is open at the router or firewall. This protocol is required for PPTP to work correctly.
In addition to GRE Protocol 47, TCP port 1723 must be enabled at all routers or firewalls between the PPTP client and server.

by tmarch

Thank you for your time and effort. I had already checked out the Microsoft Knowledge base article, and all of these parameters have been verified.

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