@Sunshine Besides, the web surface for the DNS config looks a bit different on my router. Moreover, when entering the above values, I got an error "invalid IPv6 address"

@Sunshine Thanks for your post" For some unknown reason, I don't have this option available... neither for IPv4 nor IPv6:

Hi folks, I just set up the VR2800v as ADSL router successfully, applying the credentials from m-net as Internet Service Provider in Germany. However, ISP config shall be wrong causing a problem, the...