Salut shesaid, it happens SBC has a special firmware for the speedstream 5100 so it looks nothing like what is found at portforward.com. What you have to do is to enable the bridge mode so your modem does not act as a router.
This link does tell you how ( they tell to go at
http://192.168.0.1 to access router, but enter 192.168.254.254 if that doesn't work).
http://www.kclug.org/pipermail/kclug...er/023833.html
Note that this will help connect a little (this will increase dl speeds a lot however) , but if you can't connect it is likely the fault of the firewalls you have on your machine.
LODR: salut mec!
Bonne chance