So recently I tried to open a Minecraft server, so I tried to port forward following the steps for my Tenda AC6 router, I know that I did all the steps well because previously I have opened a Minecraft server and it worked. But now it’s like that my ports are not opened; I think that the problem is that I have my ISP router (ARRIS 862A) is in bridge mode and its connected to my main router (TENDA AC1200). Also the WAN ip from the main router is different from my public one.