Fizz Modem/Router in Bridge mode: Not forwarding ports?

Hello people!
I just subscribed to Fizz Internet and got installed on friday. I did set my modem in bridge mode as I have another full featured router/set of APs. Everything works correctly EXCEPT that the Fizz Modem seems to block incoming tracffic even in bridge mode. I tried to enable IP Passthrough to the port I use (it's pretty much the only setting available in bridge mode...) without any success.
I know my own routeur is OK because it worked perfectly for years with my previous ISP. Firewalls and forwarding on my own router is all OK but still can't reach my router from the outside...
Is anyone using it in bridge mode and able to reach from the outside? Did you have to do any special configuration?


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