you can disable ipv6 at a machine level echo net.ipv6.conf.all.disable_ipv6=1 > /etc/sysctl.d/disableipv6.conf which I did. <quote> So. Installed my first Samba 4.03 PDC Kept it simple, used samba's internal DNS forwarding to the main DNS server. Edited resolv.conf to query localhost. All was well until I tried to pull down ntp from my debian (6.0) apt source. Suddenly, no can do. all the DNS supplied was in IPV6 which my router doesn't pass. Can I disable ipv6 in the Samba internal DNS server? </quote>