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Can multiple users access resources over the same VPN connection?

Posted on 2004-07-30
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Last Modified: 2012-06-27
We have a Windows 2003 Advanced Server.  It currently accepts VPN connections, and works great.

However, we're setting up a new office.  It will need to have 2 or more people using the VPN connection at the same time, from behind the same cable modem/router.  Is this possible?

The new office has a cable modem (Motorola SBG900) which doubles as a wireless gateway/router.  All of the client computers will be connecting through that connection.

I've tried just creating VPN connections on both client computers, but that doesn't work.  I can log onto the VPN with computer A just fine...but every time I try to log computer B on, it causes computer A to stop working.  Computer A appears to be connected...but no resources are available, no ping, etc.  Even when I disconnect both, computer A can't log back on (it connects to the remote IP, tries to verify username and password, and returns a 721 error).  It takes several minutes before computer A can log back on.

Thanks for all your help,

Luke
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Question by:eventprostrategies
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by:grblades
ID: 11683570
Hi eventprostrategies,
Yes it is possible but the cable modem/router has to be capable of supporting multiple VPN sessions through it. Most routers cannot.

Personally I would setup a LAN-LAN VPN so the users don't have to run a VPN client all the time. Replacing the cable router with a low end Cisco PIX would be the best solution.
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by:eventprostrategies
ID: 11685035
OK, thanks.  The only problem is that I'm at the remote office now, and I probably won't be coming back after tomorrow (it's 1500 miles from our home office).  Is there *any* way to do this without a VPN router?  I'd be happy to get one, if I knew where to find one quickly in Phoenix, AZ.  But I don't...

Incidentally, the 2 computers that need to be able to connect are running XP Pro and XP Home.

Thanks,
Luke
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by:grblades
ID: 11685110
I don't think there is any way other than getting new hardware.

Have a look at the D-link 624 (http://www.d-link.com/products/?pid=6) If you download the manual available from the website and have a look at the specifications on page 61 you will see that it supports multiple VPN-passthru sessions.

It is quite a popular product/manufacturer so you might be able to find it at a local computer store.
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by:eventprostrategies
ID: 11686103
OK.  So I managed to find a Linksys WRV54G at best buy.  It's a wireless-g vpn broadband router.

Now that I'm getting into the setup, I realize that I don't really know what I'm doing.  I don't see any place to enter a username/password for the VPN, so I suspect that it uses some other form of authentication.

I tried getting help from Linksys, but the tech was pretty rude and unhelpful.

So, as near as I can figure, I need to set up a VPN tunnel between the Linksys router here and the Cisco router at the home office.  Is that right?  If so, how on earth do I do that?

Luke
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grblades earned 125 total points
ID: 11686994
As you are now doing a LAN to LAN VPN you normally user a pre shared key rather than a username and password. These couple of links should show you what you need to do.

http://www.experts-exchange.com/Networking/Broadband/VPN/Q_20950647.html
http://linksys.custhelp.com/cgi-bin/linksys.cfg/php/enduser/std_adp.php?p_faqid=362
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