Hi. First sorry for ma pathetic English...:) . Finally I got fiber optic in my house but my internet provider give me a WW1 Zyxel WiFi5 router. Router it self is fully restricted from provider, but I managed with their support to put in bridge mode. 

i have also a option to remove their router and plug Deco65 directly in ONT device but I cant find some options to insert their details. 

They require next:

• WAN Interface - OK I Got it
• VLAN ID - Ok I got it
• PPPoE Mode  ( including username & password ) - OK I Got it
• IGMP Proxy / Disabled -  Im stuck here
• NAT:IPV4 / Enabled - A bit confused where is that option
• Service Type - Internet - Same confusion

So, question is, Is it possible in Deco BE65 to enter all required info ?

If, not.... Does Deco BE65-5G allow it or I need to buy some comptabile router with Deco BE65 Mesh? 

Thanks for support...............