...so anybody an idea what's wrong with my router?
thanks for help - special this security problem!
i think you shhould use a service like dyndns..
you would set a name like "8bit.dyndns.org:9999"
this redirects to your ip ( set it up in your router, so you will be reachable after IP change! )
then you define in your windows hosts-file: 8bit.dyndns.org = 127.0.0.1