POWER CONNECTORS FOR INTERNET
I live in a part of an old listed building which has two foot granite internal walls. The modem's signal has severe difficulty with these cutting the speed down from 35m/s to 5 or 6. To overcome this I have installed power connectors on the modem and computer power sources. There is now a good 36 m/s continuously.
What worried me is whether somebody else in the building can just plug there computer in another power connector and access my modem and possibly access my computer. I was told the power connectors can only work through ONE circuit but mine jumps from one ring circuit to the other. What is to stop it migrating out though the main switch and into the building.
I worry because I have had a couple of warnings from my antivirus about accounts being breached. I have changed several passwords and they have gone away but the worry remains as to whether my computer is accessible.