The firmware for this service was based on OpenWrt. The firmware had been customized specifically for use in the Fon Community, allowing consumers to share their broadband connection and to connect to other Fon Spots around the world.

Fon firmware creates two different Wi-Fi signals: one private and one public.
* Private ('MYPLACE'): encrypted and intended for the owner's private use. Only the Fon Spot owner can access the internal network, computers and files.
* Public ('FON_FREE_INTERNET'):