u/Careful-Onion-7442

i live in an apartment with a Verizon ONT already installed in my server/water heater closet. ever since i signed up for Fios, i have been plugging the ONT's ethernet cord directly into the wan port of my ISP provided cr1000a gateway router. i have recently come to believe that i need a modem to connect to the ONT THEN connect the router to the modem for a secure and proper setup. i have had may issues with my router admin password being changed, my WiFi settings being changed but not by me. these incidents i just provided aside, im just looking for help with proper internet setup and equipment. im totally clueless when it comes to this sort of thing. lol

TIA

yours truly, internet noobie.