Hi Voege11, (mein deutsch ist nicht so gut, also schreibe Ich in english, entschuldigung!)
I had exactly the same problem as you. Using Fritzbox 7170 and ubee modem with Cablecom. But it works! Your settings are correct as per post #22.
Here's what I did:
-turn off ubee cable modem (stuck in LAN1 of Fritzbox)
-turn off Fritzbox, then back on, wait for complete boot (no more blinking leds)
-turn on ubee cable modem
The first time, this did not work. For some reason, I received a default IP address on my computer (169.254.1.x), but I didn't recognize that the Fritzbox used that default address (169.254.1.1). Then I went back into the Fritzbox settings (using a browser on
http://169.254.1.1 ) and found that it changed to IP-Client instead of NAT-Router. So I reset this back, and did the above on/off cycle of modem and Fritzbox.
Now everything works fine, I am using Cablecom and it's fast
Hope this can help someone!
Daniel