Question : Problem: Community LAN VPN issue

Our small condo has a shared T-1 line. It was practically free because we put the administrative phone lines on the T-1 line using Voice over IP. The nice thing is we get to use the bandwidth for internet when the phone lines are not in use.  A Cisco IAD2400 serves as the router and dhcp server. The router connects to a series of baystack managed switches. The access so far has been great, but recently someone started experimenting with a AT&T VPN client to connect to their office with little success.

So far, we have tried setting up a static IP inside the router and opening up ports specified by the employers IT dept.

We do have the option to add public IP addresses to the router.

I am trying to think ahead to the day when several users are attempting to use VPN at the same time.

Question: What would be the best way to allow multiple users to access different VPN servers from inside our community LAN?

Answer : Problem: Community LAN VPN issue

if you can place a linux box behind your 2400, you may install FreeS/WAN on it which acts as VPN gateway.
It requires only one IP, and can handle multiple different VPN connections to your LAN using IPSec.
Is this what you need? or do you need VPN to your M$-servers in the LAN?