VPN setup questions

[Guest]

Hi,
I'm trying to set up a VPN to one of the PC's on my home network, which is a simple MS workgroup made up of 4 PC running XP Pro.
I've found numerous descriptions on the MS site, and elswhere that describe how to establish a VPN connection from the client side, but virtually nothing on how to set up the host side. I keep getting MS errors 800 and 678 upon attempting to connect. I've even tried disabling the firewalls entirely in order to see if that was causing the problem, but still have not been able to connect.
File sharing would probably have been simpler, but there will likely be more than one remote user connecting at any one time.
Does anybody know which ports need to be open through the firewall? Id like to use IPsec, but I'll settle for PPTP for now.
Is is possible that the logon on the client side isn't being recognized on the host side?
Will a VPN work through a Workgroup, or do I need to set up a real domain?
Thanks,
Peter

 

[Robert L [MS-MVP]]

quoted from http://www.ChicagoTech.net
Error 800: Unable to establish the VPN connection. The VPN server may be
un-reachable, or security parameters may not be configured properly for this
connection.

Resolutions:
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 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.


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Robert Lin, MS-MVP, MCSE & CNE
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