I'm sorry if I'm on the wrong topic but I finally manage to use custom router on my fiber optic connection (My ISP won't allow people to use custom routers. IDK why) After hours of workaround trying to make the IPTV and dumping my PPPoE username and pass (pass is randomly generated), I finally have internet access. The only problem here is to Port Forward/enable DMZ. I couldn't find a way to do it. I don't understand anything on OpenWRT's Wiki
This is my setup: