One type of electronic device to especially avoid is the microwave, which emits a strong signal in the 2.4GHz band, the same wireless band your router operates in. Be careful not to stick your router ...
the port forward is referring to the NAT ip addresses, not the external ip your ISP is giving you: so if all your machines are getting 192.168.1.50-100 from dhcp, switch one of them to a static ip ...