Question

Dns issue - Host domain.tld not found: 2(SERVFAIL)

Posted February 2, 2018 10.6k views
CentOSDNS

[My level of knowledge with vps , linux and bind dns settings are at learning/begginer stage]

  1. Added domain/PTR plugservice.com to droplet with ip 139.59.78.183.

  2. Then somehow setup a vanity nameserver named ns1/ns2/ns3.plugservice.com pointing to ns1/ns2/ns3.digitalocean.com. Hope it is working fine.

  3. Afterwards added a user account called michaelco.in through CWP. But domain was not reaching the droplet. So issued #Host michaelco.in and received “Host michaelco.in not found: 2(SERVFAIL)” error.

Can anyone please help me to fix the issue?

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5 answers

The issue is solved. It was due to missing A records for NS1/NS2/NS3 vanity nameservers in the droplet’s DNS manager.

Sharing some of the data:

a) #cat /etc/named.conf (some lines are removed)

zone “245.58.51.in-addr.arpa” in {
type master;
file “/var/named/245.58.51.rev.db”;
};
zone “michaelco.in” { type master; file “/var/named/michaelco.in.db”;};

b) # systemctl status named.service

● named.service - Berkeley Internet Name Domain (DNS)
Loaded: loaded (/usr/lib/systemd/system/named.service; enabled; vendor preset: disabled)
Active: active (running) since Thu 2018-02-01 20:51:31 IST; 22min ago
Process: 1015 ExecStop=/bin/sh -c /usr/sbin/rndc stop > /dev/null 2>&1 || /bin/kill -TERM $MAINPID (code=exited, status=0/SUCCESS)
Process: 1069 ExecStart=/usr/sbin/named -u named -c ${NAMEDCONF} $OPTIONS (code=exited, status=0/SUCCESS)
Process: 1066 ExecStartPre=/bin/bash -c if [ ! “$DISABLEZONECHECKING” == “yes” ]; then /usr/sbin/named-checkconf -z “$NAMEDCONF”; else echo “Checking of zone files is disabled”; fi (code=exited, status=0/SUCCESS)
Main PID: 1072 (named)
CGroup: /system.slice/named.service
└─1072 /usr/sbin/named -u named -c /etc/named.conf -4

Feb 01 20:52:07 plugservice.com named[1072]: no IPv6 interfaces found
Feb 01 20:52:07 plugservice.com named[1072]: sizing zone task pool based on 8 zones
Feb 01 20:52:07 plugservice.com named[1072]: /etc/named.conf:20: using specific query-source port suppresses port randomization and can be insecure.
Feb 01 20:52:07 plugservice.com named[1072]: /etc/named.conf:20: using specific query-source port suppresses port randomization and can be insecure.
Feb 01 20:52:07 plugservice.com named[1072]: reloading configuration succeeded
Feb 01 20:52:07 plugservice.com named[1072]: reloading zones succeeded
Feb 01 20:52:07 plugservice.com named[1072]: zone michaelco.in/IN: loaded serial 2013071600
Feb 01 20:52:07 plugservice.com named[1072]: all zones loaded
Feb 01 20:52:07 plugservice.com named[1072]: running
Feb 01 20:52:07 plugservice.com named[1072]: zone michaelco.in/IN: sending notifies (serial 2013071600)

c) dig @ns1.digitalocean.com michaelco.in

; > DiG 9.9.4-RedHat-9.9.4-51.el7_4.2 > @ns1.digitalocean.com michaelco.in
; (2 servers found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 47277
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;michaelco.in. IN A
;; Query time: 43 msec
;; SERVER: 173.245.58.51#53(173.245.58.51)
;; WHEN: Thu Feb 01 21:18:28 IST 2018
;; MSG SIZE rcvd: 41

d) #cat /var/named/michaelco.in.db

; Generated by CWP
; Zone file for michaelco.in
$TTL 14400
michaelco.in. 86400 IN SOA ns1.plugservice.com. cwp.plugservice.com. (
2013071600 ; serial, todays date+todays
86400 ; refresh, seconds
7200 ; retry, seconds
3600000 ; expire, seconds
86400 ) ; minimum, seconds
michaelco.in. 86400 IN NS ns1.plugservice.com.
michaelco.in. 86400 IN NS ns2.plugservice.com.
michaelco.in. IN A 139.59.78.183
localhost.michaelco.in. IN A 127.0.0.1
michaelco.in. IN MX 0 michaelco.in.
mail IN CNAME michaelco.in.
www IN CNAME michaelco.in.
ftp IN CNAME michaelco.in.
; Add additional settings below this line

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