My relative has bought a router instead of a switch which causes remote-access control issues on his network.
His existing network has a 1st router where all PCs are connected via LAN cables. The 2nd router connnects to the 1st router and the remaining PCs are connected to the 2nd router via LAN cables.
Normally, I would perform remote-access to help him out with some task. Now it seems all services behind the 2nd router are unavailable to me.
How can I resolve this issue?