I’m sorry, I think I didn’t make myself clear. I did not say that all ports of the router are blocked by the ISP, I just meant that to use my internet network either you use the supplied router, as well as factory, or if you want to use another router, such as an AR300M , you have to put the first isp router in Bridge, and the openwrt router in cascade mode. No other configuration is possible, because the network would not work. I use a private ip 192.168.x.x.