This is more for other people having the problem, but if you get a Roku box and it connects to the wireless network and connects to your local network but doesn’t connect to the internet and you started using OpenDNS a long time ago, make sure you’re using OpenDNS’ updated DNS servers on your router, which are at the time of this writing 208.67.222.222 and 208.67.220.220. I had OpenDNS’ old DNS IP address and it wouldn’t connect to the internet. Use the new one. That is all.
I have one of these problems. About once every month one of our computers will block messaging or certain websites. Eventually found it was because the random rotation of qwest ips match up with an old restriction put on OPENdns long ago. Talk about hard to troubleshoot.