I just bought RB750Gr3 and I'm trying to figure out, how to set it up for my needs. I would like to connect IPTV and computer devices on this router, but my ISP only allows me to use ITPV on modem port 3 and 4, while ports 1 and 2 are for internet. So I can't connect my MikroTik router to one of 4 p...