Why doesn't Ubuntu ping machines in the domain?

Question

Domain Name System

Good afternoon.
There is a freshly configured squid on Ubuntu 18.04. Everything is great, everything works except for the pages within the network. I immediately tried to ping these hosts by name, and in response I see:

spoiler

[email protected]:/home/andrey# ping exvlkdc01
ping: exvlkdc01: Temporary failure in name resolution
===
[email protected]:/home/andrey# nslookup 192.168.13.2
2.13.168.192.in-addr.arpa name = exvlkdc01.expoles.local.
Authoritative answers can be found from:
===
[email protected]:/home/andrey# nslookup exvlkdc01.expoles.local
Server: 127.0.0.53
Address: 127.0.0.53#53
** server can't find exvlkdc01.expoles.local: SERVFAIL
===
[email protected]:/home/andrey# ping 192.168.13.2
PING 192.168.13.2 (192.168.13.2) 56(84) bytes of data.
64 bytes from 192.168.13.2: icmp_seq=1 ttl=128 time=0.452 ms
64 bytes from 192.168.13.2: icmp_seq=2 ttl=128 time=0.234 ms
64 bytes from 192.168.13.2: icmp_seq=3 ttl=128 time=0.242 ms
^C
--- 192.168.13.2 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2040ms
rtt min/avg/max/mdev = 0.234/0.309/0.452/0.101 ms

[email protected]:/home/andrey# nano /etc/netplan/*.yaml

spoiler

network:
ethernets:
eth0:
addresses:
- 192.168.13.234/24
gateway4: 192.168.13.1
nameservers:
addresses:
- 192.168.13.2
- 8.8.8.8
version: 2

[email protected]:/home/andrey# nano /etc/hosts

spoiler

127.0.0.1 localhost
127.0.1.1 srv-squid.expoles.local srv-squid
# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts

From the domain this machine too does not respond by name.
Tell me what could be the problem?

Answer 1

On 18.04 DNS is configured here: /etc/systemd/resolved.conf. At least it helped me to enter Ubuntu into MS AD.