DNS problem ubuntu server 20.04

[RickJC1]

Hello everyone I am trying to get Samba 4.11.6 -Ubuntu Bind 
9.16.1-Ubuntu to work with Ubuntu server 20.04


Hostname: dc1s

NetBIOS Domain: GUNAS

DNS Domain: gunas.int


I am trying resolve a problem with not being able to find the server. 
After many days of failed attempts. I did not want to bother anyone but 
I have been defeated so I could do with some help please.


*/etc/resolv.conf*

nameserver 127.0.0.53

options edns0

search gunas.int


*/etc/systemd/network/enp0s3.network*

[Match]

Name=enp0s3


[Network]

DNS=192.168.1.123

DNSSECNegativeTrustAnchors=lan

Domains=lan


If I do *host -t SRV _ldap._tcp.gunas.int *

*Returns* Host _ldap._tcp.gunas.int not found: 3(NXDOMAIN)


If I try *host -t A dc1s.gunas.int*

*Returns* Host dc1s.gunas.int not found: 3(NXDOMAIN)


I think the problem is with DNS working


I'm not sure if after updates or not, because the monitor says it all OK.


root at dc1s:~# dig gunas.int @localhost


; <<>> DiG 9.16.1-Ubuntu <<>> gunas.int @localhost

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 6585

;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1


;; OPT PSEUDOSECTION:

; EDNS: version: 0, flags:; udp: 4096

; COOKIE: cbfd0ae2a1293dde010000005ebd4ac344d7a9c2bd4a38fc (good)

;; QUESTION SECTION:

;gunas.int. IN A


;; AUTHORITY SECTION:

int. 1773 IN SOA sns.dns.icann.org. noc.dns.icann.org. 2020050830 3600 
1800 604800 3600


;; Query time: 0 msec

;; SERVER: 127.0.0.1#53(127.0.0.1)

;; WHEN: Thu May 14 14:42:27 BST 2020

;; MSG SIZE rcvd: 123


----------------------------------------------------------------------------------------------------------


root at dc1s:~# s*ystemctl status bind9*

● named.service - BIND Domain Name Server

Loaded: loaded (/lib/systemd/system/named.service; enabled; vendor 
preset: enabled)

Active: active (running) since Thu 2020-05-14 14:38:26 BST; 13s ago

Docs: man:named(8)

Main PID: 1389 (named)

Tasks: 8 (limit: 2282)

Memory: 17.1M

CGroup: /system.slice/named.service

└─1389 /usr/sbin/named -f -u bind


May 14 14:38:26 dc1s named[1389]: command channel listening on ::1#953

May 14 14:38:26 dc1s named[1389]: managed-keys-zone: loaded serial 19

May 14 14:38:26 dc1s named[1389]: zone 127.in-addr.arpa/IN: loaded serial 1

May 14 14:38:26 dc1s named[1389]: zone 0.in-addr.arpa/IN: loaded serial 1

May 14 14:38:26 dc1s named[1389]: zone 255.in-addr.arpa/IN: loaded serial 1

May 14 14:38:26 dc1s named[1389]: zone localhost/IN: loaded serial 2

May 14 14:38:26 dc1s named[1389]: all zones loaded

May 14 14:38:26 dc1s named[1389]: running

May 14 14:38:27 dc1s named[1389]: managed-keys-zone: Key 20326 for zone 
. is now trusted (acceptance timer complete)

May 14 14:38:36 dc1s named[1389]: resolver priming query complete

root at dc1s:~#



*From syslog*

May 14 15:39:04 dc1s systemd-resolved[644]: Server returned error 
NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying 
transaction with reduced feature level UDP.

May 14 15:39:04 dc1s ntpd[717]: Soliciting pool server 81.21.65.169

May 14 15:39:04 dc1s ntpd[717]: Soliciting pool server 83.137.225.123

May 14 15:39:04 dc1s ntpd[717]: Soliciting pool server 37.59.47.71

May 14 15:39:04 dc1s systemd-resolved[644]: Server returned error 
NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying 
transaction with reduced feature level UDP.

May 14 15:39:04 dc1s systemd-resolved[644]: message repeated 2 times: [ 
Server returned error NXDOMAIN, mitigating potential DNS violation 
DVE-2018-0001, retrying transaction with reduc>

May 14 15:39:04 dc1s ntpd[717]: Soliciting pool server 91.189.89.199

May 14 15:39:04 dc1s systemd-resolved[644]: Server returned error 
NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying 
transaction with reduced feature level UDP.

May 14 15:39:05 dc1s systemd-resolved[644]: message repeated 19 times: [ 
Server returned error NXDOMAIN, mitigating potential DNS violation 
DVE-2018-0001, retrying transaction with redu>

May 14 15:39:05 dc1s ntpd[717]: Soliciting pool server 91.189.94.4

May 14 15:39:05 dc1s ntpd[717]: Soliciting pool server 85.199.214.102

Thanks

Rick