Thanks for your responses. I needed to forward to wanadoo the requests for domain wanadoo.fr, the solution was : zone "wanadoo.fr" { type forward; forward only; forwarders { 80.10.246.2; 80.10.246.129; }; }; in my /etc/named.conf I readed here that forwarders where a "bad" solution but in this case it works. If anybody knows a better way...