Windows SBS 2003 multipule VPN connection

Hello all, I'm in the process of setting up a client server network using Windows SBS 2003 including ISA. I have three client computers that need to connect to the server via Windows VPN. I have managed to successfully connect each of the client computers to the server individually, however when I try to connect more than one client computer the second computer returns an error 721 the local computer did not respond. If I disconnect the first computer wait for about ten minutes then try to connect the second computer it will be successful. Can anyone suggest a possible reason for this problem, the server has 5 CAL's four of which are free.
digital-doctorsAsked:
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Computer101Commented:
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Computer101
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NeilParbrookCommented:
It could be a number of problems.

Check in RRA that there are sufficiant ports available.

I have also in the past had problems with some routers only being able to pass through one VPN connection at a time.

What router (S) are you using?
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jsvorCommented:
Are you using ISA as your firewall connection to the outside or are you using something else for your firewall?  If something else, what are you using?
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digital-doctorsAuthor Commented:
Ref: NeilParbrook.
In regards to the RRA can you shed some light on what this is. Thanks
The router used at the remote site is a Netgear DG834G with V1.05 firmware. It does appear that this could be the problem, I have seen a number of forums on the topic

Ref: jsvor
Yes I am using ISA as the firewall connection to the outside
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NeilParbrookCommented:
RRA is Routing and Remote Access.  If this was set up from the wizards it should be OK.

Have a look at this post...

http://groups.google.co.uk/group/microsoft.public.windows.server.sbs/browse_thread/thread/3a86abc8ff7eb1b6/3250be25cc0e05ec%233250be25cc0e05ec

It looks as if this guy is having the same problem as you.  I don't know weather you could go down the firmware upgrade and use the router for VPN.  If I were you and this is the problem then I would buy a new router for your remote office. Something like a 3com office connect which I assure you won't have this problem and are cheapish.

Hope that helps

Neil
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digital-doctorsAuthor Commented:
Hello, this problem has now been resolved. It transpired that there is a limitation within the Netgear router that will only allow one outbound VPN pass through. This was resolved by swapping the Netgear modem/router over for a Zyxel 660HW-T1 modem/router this is capable of such feature. Thanks for you assist anyway
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