Commands for verifying DNS

Command to verify DNS

test environment

Domain Name Server: dns3sv.te 192.168.1.65

Data Server 1: bsdb1.te 192.168.15.1

Data Server 2: bsdb2.te 192.168.15.2

DNS verification commands include host,nslookup,dig,ping, etc.

1. host command

[root@dns3sv named]# host dns3sv.te

dns3sv.te has address 192.168.1.65

[root@dns3sv named]# host 192.168.1.65

65.1.168.192.in-addr.arpa domain name pointer dns3sv.te.

[root@dns3sv named]# host bsdb1.te

bsdb1.te has address 192.168.15.1

[root@dns3sv named]# host 192.168.15.2

2.15.168.192.in-addr.arpa domain name pointer bsdb2.te.

2. nslookup command

[root@dns3sv ~]# nslookup zsdb1.te

Server: 192.168.1.65

Address: 192.168.1.65#53

Name: zsdb1.te

Address: 192.168.15.5

[root@dns3sv ~]# nslookup zsdb1.ab

Server: 192.168.1.65

Address: 192.168.1.65#53

** server can't find zsdb1.ab: REFUSED

3. dig command

[root@dns3sv ~]# dig zsdb2.te

; DiG 9.8.2rc1-RedHat-9.8.2-0.17.rc1.el6 zsdb2.te

;; global options: +cmd

;; Got answer:

;; ->>HEADERHEADER