After creating portmappings with the webinterface of this modem/router for a while, I noticed that this webinterface has some limitiations. One of them is not being able to do portmappings for entire ranges. Unfortunately only single ports are supported.

After a while, I decided to create a small application that does the job. It enables you to specify ranges of portmappings and especially for the gamers among us, en entire list of predefined portmappings for most games is included in the installation program.

Enjoy!

You can download it here: http://www.redz.nl/downloads/tools/networktools/portmapper/setup.exe