Transparant Speedtouch enables videochat AND remote screen!!!!

Question

By making my Speedtouch ST780 as transparant as possible, i can finally videochat AND do remote screen.
1) I assigned my Mac the public IP address of my speedtouch, using the Speedtouch webinterface: Home > Network > Devices > Assign the public IP address of a connection to a device
     This adds the next portmapping In the ST780 portmap
   Idx Type Interface       Outside Address                Inside Address                 Use
     3 NAPT Internet        aaa.bbb.ccc.ddd                aaa.bbb.ccc.ddd                23
2) I set the security level of the firewall of the speedtouch to disabled, using the Speedtouch webinterface: Home > Toolbox > Firewall > Configure
     This adds the next firewall rule in the ST780:
   Chain                    Nr.  Flags  Rule                                                      
   forwardlevelDisabled   1    C E    AnyTraffic    : accept   . > .
3) I set the firewall of the Mac to " Set access for specific services and applications" and added the application ichat. Setting the Mac's firewall to "Allow all incoming connections" also works, but i need some protection now.
Of course my VOIP telephone of the speedtouch doesnot work now, but that's the next problem to tackle. Now i start from a working situation. The steps will be:
1) make a copy of the standard security level of the ST780, so you can edit it
2) add a line in the portmap to map all ports not yet used to my Mac
3) define a service for all UDP ports to be used in the firewall rules
4)add a firewall rule, allowing traffic form any interface to any interface, or a little more strict from wan to lan and vice versa
I will let you know the results

Answer 1

It isn't a bug - setting up your Mac as a web server is easy. Connecting remotely is a little harder. A service like logmein makes it very easy but if you want to avoid third parties have a look at this article: http://lifehacker.com/software/feature/special-how-to-control-your-home-computer -from-anywhere-125607.php
I've used Chicken of the VNC on Tiger and it works well - connecting remotely is more of a challenge but isn't too hard.