@terziyski Thanks a lot for the info! Hopefully, this solves the random disconnects that were happening.

@terziyski Should I put static in the Wan part? Because there's only automatic and manual in the Lan part! The main router IP Address to get to its login page is 192.168.1.1, so the X in your answer...

I'll try to be as direct as possible here! I have 3 routers: 1 is from the ISP, which I'm not allowed to access its configurations! 2 TP-Link ones (TL-WR820N V1 and a TL-WR740N V4) to expand the...