I have a Technicolor 797 v3 and i try to connect it to my asus RT-AC5300 but there is no LAN port to plug it in. It works slightly if i plug it into a normal Ethernet port but then im pretty sure its causing both the modem/router and router to have local ip adresses and then it makes most of my games unplayable because of strict nat types. i cant even portforward the games it doesnt work. Ive tested it after i correctly port forwarded the ports and it still says they are not forwarded.