My network runs through the electrical wiring of the house and is organised as such:
- an ADSL+network switch, using DHCP (address : 172.19.3.1)
- (Mac) PCs connected via an electrical adapter (model: D-Link DHP-200) (1 per PC)
- 1 switch (8 ports) connected via an electrical adapter (model: D-Link DHP-200) (address unknown)
- 2 Mac PCs connected (via RJ45 network wires) to that router using DHCP
On the first floor, file transfers between PCs are fast and perfect. But if I try to transfer files from or to a computer on the ground floor, the speed is slow and eventually the transfer dies out.
So I suspect the 1st floor switch is creating some kind of barrier (firewall?) preventing external PCs from accessing the PCs it is connected to?
Am I right and if so, how could I disable that barrier?