I have a router that i built with RH9 and i have all my firewall settings in iptables. Everything works great on it except for one thing. I have port 1723 and protocol 47 forwarded to a server on the inside of my network. The problem i am having is, i can only have one person connected to the vpn at a time. when one use is already logged in and a second user trys to log in they get the error message: "Error721: The Remote Computer Did Not Respond." Any ideas on how to fix this would be greatly appreciated.

Here is the code that im using in iptables to forward those two protocols:

-A PREROUTING -p tcp -m tcp -i eth1 --dport 1723 -j DNAT --to-destination 192.168.0.2:1723
-A PREROUTING -p 47 -i eth1 -j DNAT --to-destination 192.168.0.2

Thanks for the help in advance.

I'm also guessing that this could be that i don't have a module loaded. Any idea's on this would also be great.