Почему не работает DNS в Debian 10?

lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description: Debian GNU/Linux 10 (buster)
Release: 10
Codename: buster

sudo named -v
BIND 9.11.5-P4-5.1-Debian (Extended Support Version) <_id:998753c_>

hostname
srv-dc-0001

cat /etc/hosts
127.0.0.1 localhost
192.168.0.104 srv-dc-0001.mydomain.loc srv-dc-0001

# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

cat /etc/bind/named.conf
// This is the primary configuration file for the BIND DNS server named.
//
// Please read /usr/share/doc/bind9/README.Debian.gz for information on the
// structure of BIND configuration files in Debian, *BEFORE* you customize
// this configuration file.
//
// If you are just adding zones, please do that in /etc/bind/named.conf.local

include "/etc/bind/named.conf.options";
include "/etc/bind/named.conf.local";
include "/etc/bind/named.conf.default-zones";

cat /etc/bind/named.conf.default-zones
// prime the server with knowledge of the root servers
zone "." {
type hint;
file "/usr/share/dns/root.hints";
};

// be authoritative for the localhost forward and reverse zones, and for
// broadcast zones as per RFC 1912

zone "localhost" {
type master;
file "/etc/bind/db.local";
};

zone "127.in-addr.arpa" {
type master;
file "/etc/bind/db.127";
};

zone "0.in-addr.arpa" {
type master;
file "/etc/bind/db.0";
};

zone "255.in-addr.arpa" {
type master;
file "/etc/bind/db.255";
};

zone "mydomain.loc" {
type master;
file "/etc/bind/db.mydomain";
};

zone "0.168.192.in-addr.arpa" {
type master;
file "/etc/bind/db.192.168.0";
};

cat /etc/bind/db.mydomain
;
; BIND data file for local loopback interface
;
$TTL 604800
@ IN SOA srv-dc-0001.mydomain.loc. (
201911111133 ; Serial
604800 ; Refresh
86400 ; Retry
2419200 ; Expire
604800 ) ; Negative Cache TTL
;
@ IN NS srv-dc-0001.
@ IN A 192.168.0.104
@ IN AAAA ::1
srv-dc-0001 IN A 192.168.0.104

cat /etc/bind/db.192.168.0
;
; BIND reverse data file for local loopback interface
;
$TTL 604800
@ IN SOA srv-dc-0001.mydomain.loc. (
201911111056 ; Serial
604800 ; Refresh
86400 ; Retry
2419200 ; Expire
604800 ) ; Negative Cache TTL
;
@ IN NS srv-dc-0001.
104 IN PTR srv-dc-0001.

ip address
1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp0s3: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 08:00:27:a8:e8:9a brd ff:ff:ff:ff:ff:ff
inet 192.168.0.104/24 brd 192.168.0.255 scope global noprefixroute enp0s3
valid_lft forever preferred_lft forever
inet6 fe80::aeb7:f378:cf15:e0ea/64 scope link noprefixroute
valid_lft forever preferred_lft forever

sudo systemctl status bind9
bind9.service - BIND Domain Name Server
Loaded: loaded (/lib/systemd/system/bind9.service; enabled; vendor preset: enabled)
Active: active (running) since Mon 2019-11-11 13:54:47 MSK; 8min ago
Docs: man:named(8)
Process: 555 ExecStart=/usr/sbin/named $OPTIONS (code=exited, status=0/SUCCESS)
Main PID: 578 (named)
Tasks: 4 (limit: 4689)
Memory: 23.0M
CGroup: /system.slice/bind9.service
└─578 /usr/sbin/named -u bind

ноя 11 14:00:36 srv-dc-0001 named[578]: network unreachable resolving 'dns4.easydns.info/A/IN': 2001:500:1b::1#53
ноя 11 14:00:36 srv-dc-0001 named[578]: network unreachable resolving 'dns4.easydns.info/A/IN': 2001:500:19::1#53
ноя 11 14:00:37 srv-dc-0001 named[578]: network unreachable resolving 'dns4.easydns.info/AAAA/IN': 2620:49:4::10#53
ноя 11 14:00:37 srv-dc-0001 named[578]: network unreachable resolving 'dns1.easydns.com/AAAA/IN': 2400:cb00:2049:1::a29f:1835#53
ноя 11 14:00:37 srv-dc-0001 named[578]: network unreachable resolving 'dns2.easydns.net/A/IN': 2400:cb00:2049:1::c629:defe#53
ноя 11 14:00:37 srv-dc-0001 named[578]: network unreachable resolving 'dns2.easydns.net/AAAA/IN': 2400:cb00:2049:1::c629:defe#53
ноя 11 14:00:37 srv-dc-0001 named[578]: network unreachable resolving 'dns3.easydns.org/A/IN': 2620:49:3::10#53
ноя 11 14:00:37 srv-dc-0001 named[578]: network unreachable resolving 'dns3.easydns.org/AAAA/IN': 2620:49:3::10#53
ноя 11 14:00:37 srv-dc-0001 named[578]: network unreachable resolving 'dns3.easydns.org/A/IN': 2400:cb00:2049:1::c629:defe#53
ноя 11 14:00:37 srv-dc-0001 named[578]: network unreachable resolving 'dns3.easydns.org/AAAA/IN': 2400:cb00:2049:1::c629:defe#53

cat /etc/nsswitch.conf
# /etc/nsswitch.conf
#
# Example configuration of GNU Name Service Switch functionality.
# If you have the `glibc-doc-reference' and `info' packages installed, try:
# `info libc "Name Service Switch"' for information about this file.

passwd: files systemd
group: files systemd
shadow: files
gshadow: files

hosts: files dns mdns4_minimal [NOTFOUND=return]
networks: files

protocols: db files
services: db files
ethers: db files
rpc: db files

netgroup: nis

cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 127.0.0.1
search mydomain.loc
# Автоматически подставляется при поиске коротких имён хостов
domain mydomain.loc
# Список поиска для имён хостов. Обычно используется имя домена. При необходимости можно дополнить список
# именами доменов через пробел. Последовательность имеет значение.
nameserver 192.168.0.1
nameserver 8.8.8.8
nameserver 8.8.4.4

netstat -lntup | grep ":53"
tcp 0 0 127.0.0.1:53 0.0.0.0:* LISTEN 578/named
tcp6 0 0 :::53 :::* LISTEN 578/named
udp 0 0 0.0.0.0:5353 0.0.0.0:* 447/avahi-daemon: r
udp 0 0 192.168.0.104:53 0.0.0.0:* 578/named
udp 0 0 127.0.0.1:53 0.0.0.0:* 578/named
udp6 0 0 :::5353 :::* 447/avahi-daemon: r
udp6 0 0 :::53 :::* 578/named

dig mydomain.loc
; <<>> DiG 9.11.5-P4-5.1-Debian <<>> mydomain.loc
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 20557
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
; COOKIE: 4452b738672011a4325f28a35dc940e17a4e802091c64422 (good)
;; QUESTION SECTION:
;mydomain.loc. IN A

;; Query time: 0 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Пн ноя 11 14:07:13 MSK 2019
;; MSG SIZE rcvd: 69

getent ahosts
127.0.0.1 localhost
192.168.0.104 srv-dc-0001.mydomain.loc srv-dc-0001
127.0.0.1 localhost ip6-localhost ip6-loopback

Но при запросах из DNS ничего не возвращается, и не берётся из файлов настроек DNS
getent -s hosts:dns ahosts