New router 2gb internet but gaming lag thru LAN cable
So I have Xfinity I recently upgraded to 2k mbts, so I had to upgrad my router to new be550 wifi 7 system. I was looking forward to playing some online multiplayer but for some reason I lag as soon as I get into a match. I'm connected thru cat8 lan cables ! I'm not sure what settings i need to change for the router to allow me to play at the speeds I have. On the WiFi 5g connection I'm good and I don't lag. But what's going on with my lan settings for it not to allow me to game. I'm alittle bummed I don't want to open ports to possibly get hacked or get my information stolen thru the web.
please help guys thank you for your time