@cheesecake123 

I might now really have the answer, but I do have a few things you could try.

• The DNS you are using (8.8.8.8) is Google's but there is also a secondary you should be using as well, 8.8.4.4, are you also using that?
• Try using the ISP's default DNS setting in the router.
• Try a direct connect to the modem with a wired PC. See if you get the WAN IP address on the PC and can access the Internet?
• Try a different Ethernet cable from modem to router.

Depending on the results it could clearly indicate where the problem lies.

DNS problems, use the ISP's.

Ethernet cable, use the one that works.

Hard wired to modem with the same results, ISP modem problem.

Hard wired to modem works fine, and cable is known to be good, router problem probably.