1) if you have firewall, open TCP Port 1723, IP Protocol 47 (GRE).
2) make sure you can reach the VPN server by using ping. Sometimes, poor connection can cause this issue too.
3) You may need to updated firmware on a router or firewall if other OS (win9x/nt/me/w2k) works except XP.
4) The VPN server may not be able to get IP from DHCP for the VPN client. So, you may want to re-configure VPN host networking settings. For XP pro VPN host, go to the Properties of the VPN>Network, check Specify TCP/IP address and Allow calling computer to specify its own IP address, and uncheck Assign TCP/IP addresses automatically using DHCP.
5) Make sure no other secure software blocks your access, for example, if you use Norton secure software, you may need to add the remote client's IP so that the client can access.
6) If your VPN running on a Windows RRAS with NAT enabled, you may want to check the NAT settings.
7) If you can establish the VPN from the desktop at home but not from the laptop. Make sure no security software like Microsoft OneCare software that blocks the GRE.
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With most VPNs, as soon as the VPN connection is established, it will take precedence over all other network connections. Access to the Internet (other than to keep the VPN connection itself alive) will go via the VPN and the corporate network you are connected to, rather than the local ISP.Furthermore, access to the local network is temporarily disabled.
As a result, your local print server may not be accessible, you cannot use devices via the Network USB hub, or the USB ports on your router (if it has these), you may not even be able to access your local router's configuration page or ping the router or other machines in the local network.
This is done because of security reasons. When a computer is connected to a corporate network via a VPN, the administrator needs to make sure that that machine can not act as a some form of a gateway enabling other machines in the local network to access that corporate network in any way. For that reason, the machine connecting via the VPN must temporarily be isolated from the local network.
This issue may be caused by a router that has outdated firmware.
Make sure that port 1723 is opened on your router. For VPN connection , you can try opening port 500, 443-447, 10000-20000 and important port 1723 on your router.
I will suggest you to upgrade firmware on your Linksys router. After upgrading the firmware, reset the router to factory default and reconfigure it manually. Open the ports mentioned above and see if that works.
I am myself a (cisco certified network associate)CCNA, we have configured several VPNs on XP, please try these steps and im sure you'll be able to reconfigure the Virtual private network on your XP...
First open the control panel by clicking start,open the
Network Connections item in Control Panel. A list of existing dial-up and
LAN connections will appear.
Choose the 'Create a new connection' item from the
left-hand side of the window. The Windows XP New Connection Wizard will
appear on the screen.
First click Next to begin the wizard, then choose the
'Connect to the network at my workplace' item from the list and click
On the Network Connection page of the wizard, choose
the 'Virtual Private Network connection' option and click Next.
Enter a name for the new VPN connection in the 'Company
Name' field and click Next. The name chosen need not match the name of an
Choose an option on the 'Public Network' screen and
click Next. The default option, 'Automatically dial this initial
connection' can be used if the VPN connection will always be initiated
when the computer is not already connected to the Internet. Otherwise,
choose the 'Do not dial the initial connection' option. This option
requires that the public Internet connection be established first, before
this new VPN connection will be initiated.
Enter the name or IP address of the VPN remote access
server to connect to, and click Next. Company network administrators will
provide this information.
Choose an option on the "Connection
Availability" screen and click Next. The default option, 'My Use
Only,' ensures that Windows will make this new connection available only
to the currently logged on user. Otherwise, choose the 'Anyone's use'
Click Finish to complete the wizard. The new VPN
connection information has been saved. Good luck ;-)
Could you please explain me how to you are trying to establish the vpn its a site to site or site to client another thing if you are connecting to head office through mobile user client behind any natted device you should enable nat traversal in your firewall then only i will works.
Buy 2 DIR 130 VPN routers and connect the two office networks via LAN-LAN VPN tunnels. If you have the time and skills you can build two IPCOP firewall routers and connect via VPN tunnels (http://sourceforge.net/apps/trac/ipcop/wiki)