Hello,
first of all the nameservers in /etc/resolv.conf are queried in order.
That means the 2'nd one is only queried when the first one does not
answer. Even NXDOMAIN is a valid answer.
So the first one should also return IPv6 over a IPv4 connection.
How do you query the nameserver? dig, 'getent hosts' ... ?
Am 27.03.25 um 05:04 schrieb Mal:
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
