I’ve setup knot-resolver and it working for the best part. However, I’ve found that a specific external domain that is important to us isn’t able to resolve successfully. I’m not sure if there might be other domain with the same problem. Any suggestions would be awesome.

“MTN.com”

[root@localhost ~]# whois mtn.com

   Domain Name: MTN.COM

   Registry Domain ID: 63727_DOMAIN_COM-VRSN

   Registrar WHOIS Server: whois.lexsynergy.com

   Registrar URL: http://www.lexsynergy.com

   Updated Date: 2020-01-21T23:41:38Z

   Creation Date: 1993-02-19T05:00:00Z

   Registry Expiry Date: 2021-02-20T05:00:00Z

   Registrar: LEXSYNERGY LIMITED

   Registrar IANA ID: 1466

   Registrar Abuse Contact Email: abuse@lexsynergy.com

   Registrar Abuse Contact Phone: +442031370459

   Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited

   Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited

   Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited

   Name Server: NS1.IAFRICA.COM

   Name Server: NS2.IAFRICA.COM

   DNSSEC: unsigned

   URL of the ICANN Whois I

[root@localhost ~]#  dig mtn.com

; <<>> DiG 9.11.13-RedHat-9.11.13-6.el8_2.1 <<>> mtn.com

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 44242

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

;; OPT PSEUDOSECTION:

; EDNS: version: 0, flags:; udp: 1232

;; QUESTION SECTION:

;mtn.com.                       IN      A

;; Query time: 2810 msec

;; SERVER: 172.24.5.131#53(172.24.5.131)

;; WHEN: Sun Nov 15 06:53:23 EET 2020

;; MSG SIZE  rcvd: 36

[root@localhost ~]#

[root@localhost ~]#  dig @8.8.8.8 mtn.com

; <<>> DiG 9.11.13-RedHat-9.11.13-6.el8_2.1 <<>> @8.8.8.8 mtn.com

; (1 server found)

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 21571

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

;; OPT PSEUDOSECTION:

; EDNS: version: 0, flags:; udp: 512

;; QUESTION SECTION:

;mtn.com.                       IN      A

;; ANSWER SECTION:

mtn.com.                1389    IN      A       192.0.66.2

;; Query time: 64 msec

;; SERVER: 8.8.8.8#53(8.8.8.8)

;; WHEN: Sun Nov 15 06:54:18 EET 2020

;; MSG SIZE  rcvd: 52

[root@localhost ~]#

Rrds,

Mike