Right clicked on the connection (wired), then double clicked on the ipv4 , then set IP for Pi-hole as primary, then secondary I made it 8.8.8.8.. Since it wont let me add just one DNS. The reason I was curious is because hen i disable UBlock on the test sites the ads show up, If I enable it they don't.
If I disable UBlock it says I need a ad blocker like pihole. If I leave UBlock enabled it says I am blocking ads.
As far as the DNS settings for whole network blocking. I have a Comcast XB6 and you cannot change the DNS. If I do the DNS for pihole it will still be using DHCP because I cannot disable that either on the modem. Those settings are not accessible. I am contemplating getting a Edgerouter X and bridging the modem.
If you have a spare WiFi router, put it in bridge mode (keep in mind that this will disable Router functionality of Gateway and turn off the private Wi-Fi network) and use the Pi-Hole as your DHCP server.
You can also add your own Modem to the account (if you don't use the phone lines) and remove the rented one (saving some $$ in the long run) (you can get the supported devices from BestBuy, Walmart, Amazon ...).
Think I am going to do it this way for now. Eventually will get a Ubiquiti Edgerouter X, then bridge the modem. Si it would be modem (bridged)>ERX>switch. Pi is wired to switch now. So, I am assuming by bridgeing the modem that disables DHCP on that then hands it over to the ERX, whch i would disable, to make the PI handle DHCP. Correct?