Ziggo Cisco EPC3925 modem/router

I had problems with this modem (spontaneously delivered by Ziggo Netherlands) because the domain name resolving did not work properly.

It did not matter if I used Ziggo’s own domain name servers or the Google domain name servers.
The problem was persistent for about 70% of the time.

After calling with the help desk someone switched off the router capabilities of the modem which resolved my problem as I use my own router for my network anyway.

Now I have my WAN IP address directly on my router.