I'm using the latest firmware. The NetDuma is connected in DMZ mode on the TIM router because my modem doesn't have the Bridge Mode function (or at least I think since I didn't find any settings about it on the TIM router interface). I was actually wrong to write in the first message. I don't actually lose my connection but I only have a very slow connection (like 1MB) until I restart the modem.At the next disconnect I will try to send the log.