Yes, that’s right.
I’m not familiar with ROCK, but I’ve found this configuration display on the Internet:
I suppose that DHCP is active on your system and I guess that the other fields are greyed-out. There you can check the IP-Address of the DNS that you received from DHCP (which is probably the IP of your router).
The easiest way imho is to write down all networking data, change to static ip and use 8.8.8.8 as DNS Server (all other Addresses should be identical) and reboot the machine. But do this at your own risk and only if you’re familiar with some basic networking knowledge!. And be sure that you have a backup of your mediafiles…