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conecting to windows 2003 VPN

Posted on 2007-03-20
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Conecting to windows VPN.

HI Experts,
I have a windows 2003 server with a basic dlink 504 adsl router modem , i have vpn pass through to the server 2003.

I can connect to the VPN from my other office with one log in using windows vpn dial in. created a new connection, added ip and user and pass and i get straight in and conected,
my problem is as soon as i try to use another computer to access the the vpn as well it conects but the
problem is it tries to authenticate but just does not register on the domain. soon as i disconect the first conection the second connection will then connect.
It seems it only allows one conection per IP.


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Question by:Avision27
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Olaf De Ceuster earned 2000 total points
ID: 18754695
Most routers will only allow one pptp connection at the time. However SBS allows more than one so if passthrough or GRE are enabled on the router you should be fine.
Check this on your router:
From DLINK.
"In order to allow VPN traffic to pass through your router with NAT enabled you need to put a tick next to "PPTP" or "IPSec" under IP Masquerade Passthrough. Also under NAT ALGs tick PPTP and IPSec. In the latest revisions of firmware the IP Masquerade Passthrough is enabled automatically via NAT ALGs, so you do not have to configure this option if you do not see it there"
You need to also check on the server:
1: That you are running at least SBS 2003 SP1
2:That you run the remote access wizard: Server Management> To Do List> Point 3.
3.Start> Administrative tools>Routing and remote access>Right click on ports> Left click on PPTP and make sure you have enough open ports. (The default is 5)
Hope that helps,
Olaf
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