I build on 2 locations in the T-Mobile Thuis network a similar setup: a Zyxel VMG8825 T50 modem and a NAS connected, and all is configured exactly the same at both sides. The IP address belonging to the NAS-URL of each NAS, is updated via DDNS (Setup in both Zyxel) with NO-IP.
1.When I try to connect from Laptop-1 to NAS-2 from IP = 85.144.x.y (=Zyxel-1) it fails.
2.When I try to connect from Laptop-2 to NAS-1 from IP = 87.208.x.y (=Zyxel-2 it works fine.
3.When I try from any other non-T-Mobile Thuis access point, or via Wifi Hotspot on the Mobile Phone, it works just fine.
4.Resetting Zyxel-1 has no effect.
1.No ping works on the T-Mobile Thuis network
2.Routing from 85.144.x.y to 87.208.x.y domain fails
3.Routing from 87.208.x.y to 85.144.x.y domain works fine.
Can anyone advise whether I made a mistake, or is it a T-Mobile Thuis network configuration issue ?