Old Town, apartment building, thick damp walls A stable wireless via an apartment is unavailable due to the strong shielding of the rubble stone walls. Here I have placed with 2 pieces Powerline 500 AV Wireless + WLAN. Ultimately, the devices running only Linux, but with a very clear configuration interface. The two units of the same among themselves SSID and passwords so that only one of the devices must be configured.
Notices 1: Be sure the Powerline with the configuration tool encrypt. I've been using the factory settings get access to the network of the neighboring apartment during commissioning. The Powerline is blocked at the electricity meter, long gone wrong with the modern technology. 2: The two wireless frequencies 2.4 GHz and 5 GHz can not be used simultaneously.