Cant enter 2nd router in a Cascaded router setup.

[PhysicallyMutated]

Hello everyone,

So recently i moved in a new house and i put my computer on a room at the 1st floor.
My cable from my router was too short so i decided 2 connect it to another router that is closer to me.
Now i want to portforward something but i cant enter the 2nd router but i can enter the 1st one.
I personally think that my 1st router changed the gateway of my 2nd router, but i dont know how to fix it.

 

[RealBeast]

Did you simply attach them together or did you actually set them up as cascaded routers on distinct subnets? (LAN port to WAN port connection with different network addresses)

You really don't want that, you want to connect them LAN to LAN port and turn off DHCP on the second router and give it an IP address in the network range of the main router (the one connected to the modem), but insure that address is outside the DHCP assignment range of the main router. That would result in router 2 being an access point/switch.

Alternate plan B: buy longer Ethernet cable.