DNS service: No currently assigned DNS forwarders - never ever

Question

Running UTM 9.510-4 but this is not a new one. No matter what I enter into the forwarders field or even nothing or activate ISP forwarders, there are always no forwarders assigned. I found and followed the DNS best practice in the forum, but no change. AFAIK the root servers will be then used and they are usually slow. 
 Any ideas how to solve that?

gsxfan · Answer

DKKDG said: Hi gsxfan,
 what kind of external interface do you have? 
 Is it an ethenet dchp or pppoe interface? You get this dns information via pppoe or dhcp. 
 Otherwise you don't have there any forwarders defined and must define them by yourself. 
 Best Regards 
 DKKDG 
 That's it. The ext IF is neither a DHCP nor a PPOE IF, it is an ethernet IF with a fixed IP. I didn't know that it makes a difference. Thanks for letting me know.