In fact, I spend 3-4hours last night trying to solve this and a little drive to see if there were damages on my ADSL wire. And today I tried to contact my ISP 4 times, 30+min waiting for nothing each. They were overloaded (usually they respond in 5min and it's real techs speaking linux too answering). But today they just didn't answer, I think they were overloaded. Anyway everything is back online now :)