Hello On Debian 6.1.129-1, I have a static network interface conf (no Netplan) with both IPv4 & IPv6 addressing and Name-servers set.
> root@debian:/home/user# more /etc/network/interfaces source /etc/network/interfaces.d/* # The loopback network interface auto lo iface lo inet loopback allow-hotplug enp1s0 iface enp1s0 inet static address 12.34.56.78 network 12.34.56.0 netmask 255.255.255.0 broadcast 12.34.56.255 gateway 12.34.56.1 iface enp1s0 inet6 static address 2xxx:xxxx:x00:1::50 netmask 64 gateway 2xxx:xxxx:x00:1::1 dns-nameservers 12.34.56.80 2xxx:xxx:x00:1::80 When I query what is set in resolv.conf file, It only returns the IPv4 host. root@debian:/home/user# more /etc/resolv.conf nameserver 12.34.56.80 On another older machine (running kernel 4.9.35-v7+) with exactly the same configuration layout, I get BOTH the IPv4 & IPv6 addresses returned from resolv.conf > root@another:/home/user# more /etc/resolv.conf nameserver 12.34.56.80 nameserver 2xxx:xxx:x00:1::80 The IPv6 networking side has no issues - I can ssh over to other machines via IPv6 with no issues. And the machine is serving v6 web traffic fine. Mal
