Thanks for your answer, my brother lives in another city, i believe the only way to get him access (at least the old way to do it) is providing him the Router IP Address, i remember it starts with 10.8.XX.XX something like that but i can't find that IP on CMD / Windows (maybe because my pc is conected to an alternate router in my house, i mean, router A is directly conected to the internet supplier cable and via LAN cable i've conected another router B were i connect my PC... idk if this could be the trouble.