ok well update
edgerouter installed, got internet access (zyxel in bridge mode).
set up static IP addresses via the DHCP server - all ok
opened up ports on firewall and pointed them to the static IPs - sort of works
it seems the firewall is blocking internal traffic as well as external... ie i can't access 192.168.1.2:7878
wifi, something went a bit weird there, the Unifi AP took an age to pick up a new IP address from the network, and for about 45 minutes was totally dead to the world (not even visible on a wifi scan), the power was never disconnected to it. then it seems to kick back into life. it's not visible in the unifi controller though.
so first things that needs sorted.
1) firewall clearly isn't working as i expected. i've opened up a couple of specific ports for external incoming traffic.
but it appears that even for internal traffic it's blocking connections to other internal devices.
2) need to get the unifi AP to be visible in the controller again. the controller is hosted on a windows PC on the network, so i'm guessing that the firewall has something to do with that
3) is it possible to get access to the zyxel from the network? ie connect to the web interface on it? and a sub-question, where can i see what the DSL connection is like? is that visible on the edgerouter? or only on the zyxel ?
4) what should the MTU be set ot on the edgerouter for the PPPoE? it's currently set to 1492
edit - i have posted an image but for some reason it's not showing up when i view the forum in my network. shows up fine when on 4G though!!