edita /etc/ppp/pppoe.conf

# DNS type: SERVER=obtain from server; SPECIFY=use DNS1 and DNS2;
# NOCHANGE=do not adjust.
DNSTYPE=SERVER

# Obtain DNS server addresses from the peer (recent versions of pppd only)
# In old config files, this used to be called USEPEERDNS. Changed to
# PEERDNS for better Red Hat compatibility
PEERDNS=yes

DNS1=
DNS2=

metti
DNSTYPE=SPECIFY
PEERDNS=no
DNS1=127.0.0.1
DNS2=un dns alternativo