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Troubleshoot VPN connections and error codes
| Issues or Symptoms |
Article Title & Link |
Description or Resolution |
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Error 1053: The service did not respond to the start or
control request in a timely fashion. |
Routing and
Remote Access stops responding in Windows Server 2003 |
A supported hotfix is now available
from Microsoft, but it is only intended to correct the problem that is
described in this article. |
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| |
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| Error 633 - the modem (or other
connecting device) is already in use or is not configured properly.
|
"Error 633 - the modem is already in use" error message when you try to
establish a VPN connection... |
This issue may occur if the TCP port that is used by
the VPN connection is already being used by another program. The VPN
connection uses TCP port 1723 to establish a connection. If another
program is already using this port, you cannot establish a VPN
connection. |
|
| Error 792 and Event ID 547 - IKE security
association negotiation failed. |
You receive an "Error 792" error message and you cannot connect to a
node in a Windows Server 2003... |
To resolve this problem, obtain the latest service
pack for Microsoft Windows XP. A supported hotfix is now available from
Microsoft, but it is only intended to correct the problem that is
described in this article. |
|
|
When you try to establish a VPN connection, you may
receive the following error message: Error 800 |
Error Message: VPN Connection Error 800: Unable to
Establish Connection |
This issue may be caused by a router that has outdated
firmware. For example, this issue may occur if you are using a Cisco
router with firmware that is dated 2000 or earlier. |
|
| You may want to place a
PPTP server on the internal network and configure Windows XP ICS to
forward the VPN traffic to the PPTP server. |
|
This article describes the process that is required to
map PPTP back to an internal host, so that an incoming VPN connection
can pass through the Windows XP ICS computer. For the purposes of this
article, it is assumed that the PPTP server is already configured
properly and is able to accept PPTP connections from clients on the
local network. |
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|
This article lists the error codes that you may receive
when you use Windows 2000, Windows XP, or Windows Server 2003 as a
client computer to make a dial-up connection or a VPN connection |
List of Error Codes for Dial-up Connections or VPN
Connections |
Note Error codes with
numbers higher than 900 will only be seen if you are trying to connect
to a Routing and Remote Access Server that is running Windows 2000 or
later. |
|
Troubleshooting VPN connection issues typically
involves contacting your Internet service provider (ISP), your VPN server
administrator, or your router or firewall manufacturer.
When you try to connect to your VPN server, you may not be able to connect,
and you may receive one of the following error messages:
Error 678: There was no
answer.
Error 930: The authentication server did not respond to authentication
requests in a timely fashion.
Error 800: Unable to establish connection.
Error 623: The system could not find the phone book entry for this
connection.
Error 720: No PPP control protocols configured.
To resolve this issue, use one of the following
methods:
|
• |
Verify
that you have connected to the Internet before you try to connect to the
VPN server.
For additional information about troubleshooting Internet Connectivity
in Windows XP, click the following article numbers to view the articles
in the Microsoft Knowledge Base:
314067 How to troubleshoot
TCP/IP connectivity with Windows XP
314095 How to troubleshoot
possible causes of Internet connection problems |
|
• |
If you
can connect to the Internet but you still cannot establish a connection
to the VPN server, and you receive error 623, see the following
Microsoft Knowledge Base article:
227391 Error message: "Error
623 the system could not find the phone book entry for this connection"
when making a VPN connection |
|
• |
If you
can connect to the Internet but you still cannot establish a connection
to the VPN server, and you receive error 720, see the following
Microsoft Knowledge Base article:
314869 Error 720: No PPP
control protocols configured |
|
• |
If you
still cannot connect to the VPN server, the VPN server may not be
configured correctly. Contact your VPN server administrator.
If you are the VPN server administrator, see the following Microsoft
Knowledge Base articles for additional information about how to
configure a Microsoft VPN server:
308208 How To Install and
configure a virtual private network server in Windows 2000
162847 Troubleshooting PPTP
connectivity issues in Windows NT 4.0
299684 Error message: Error
930; The authentication server did not respond to authentication
requests in a timely fashion |
|
• |
If you use a personal firewall or a broadband router, or
if there are routers or firewalls between the VPN client and the VPN
server, the following ports and protocol must be enabled for PPTP on all
firewalls and routers that are between the VPN client and the VPN
server:
|
Client ports |
Server port |
Protocol |
|
1024-65535/TCP |
1723/TCP |
PPTP |
Additionally, you must enable IP PROTOCOL 47 (GRE).
|
Note If you cannot connect to shared resources
on the remote network by computer, you can use the remote computer's IP
address to connect by using UNC (\\<IP_Address>\Share_name). Edit the hosts
file in the Windows\System32\Drivers\ folder, and add an entry to map the
remote server's name to its IP address. Then use the computer name in a UNC
connection (\\Server_name\Share_name).
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