I see. Three quick clarification questions before I do further reading/research.
My TrueNAS has access to the internet with DHCP enabled. I was, for example, able to perform curl -fsSL https://download.docker.com/linux/debian/gpg with no problems. Do I still need to set-up DNS?
I apologize in advance if I’m being dense, but here I understood the guide as asking for DHCP to be disabled on the physical interface.