I am setting up an old TL-WR810N device to use a fiber internet connection from "Deutsche Glasfaser".
The WAN interface (eth0) is up and has a valid IP address from the fiber modem. (DHCP-client)
Login information is stored on the fiber modem, therefore I don't need PPPoE.
The routes and firewall rules are set to default values and should work as fas as I know.
Via wlan or eth1 interface I can't reach the gateway of the WAN interface or any IP address in the net (e.g. 22.214.171.124). A traceroute tells me that the correct route to the WAN interface is used, but after that I get the message that the target net is unreachable.
What I can see are UDP connections to the DNS servers of the provider.
Can you help me checking what I have missed or configured wrong?
I am using OpenWrt 18.06.2 via LuCI.
In general, when I connect a PC directly to the fiber modem, the internet connection is working just fine. Yes - I know that I won't be able to use the full bandwith of the fiber connection with this device (TL-WR810N).