Forwarding PPTP through the firewall
 

Using a 2.4 kernal and iptables, I'm simply trying to forward pptp traffic (TCP port 1723 and IP protocal 47). Anybody have any ideas, because it doesn't seem to be working very well. Here is what I used...
-A PREROUTING -i eth0 -p tcp -m tcp --dport 1723 -j DNAT --to-destination 192.168.0.8:1723
-A PREROUTING -i eth0 -p 47 -j DNAT --to-destination 192.168.0.8
Which appears that it should be right, but also doesn't appear to actually do anything.

I appreciate the help. We have anohter public IP but I don't like the idea of putting a windows server on a public IP.