FTTC settings for modem and firewall

[Alex_UK]

hey guys, I'm trying to get a firewall working and using a fritzbox 7530 as a modem, but so far I've not managed to make it work.

Does anyone know the FTTC settings for the modem and then for authentication? So far I could find, VLAN 101, MTU 1492 and PPPOE. I can't get my fritzbox to work with these settings manually, if I set it to automatic, it picks up all details from Zen, but I've no idea what those settings are as there is no way to find them in the fritzbox.

Can anyone help please?

My end goal is to setup the fritzbox as a modem/bridge/passthrough and let the firewall do the authentication