[dns-operations] DNS Issue

Samir Abidali samir.abidali at gorannet.net
Wed Apr 24 13:06:50 UTC 2013


I wonder if someone can guide me in the direction for troubleshooting my DNS issues.

I work in the regional ISP, we have to DNS servers where it works fine for most of the Domain names but it cannot resolve some others, like dyn.com.

When I try to do dig + trace , below is the output, the txt in red shows that for that specific domain the DNS server cannot resolve it, please guide me to the proper procedure for troubleshooting such problem.

dig dyn.com +trace

; <<>> DiG 9.3.4-P1 <<>> dyn.com +trace
;; global options:  printcmd
.                       518394  IN      NS      j.root-servers.net.
.                       518394  IN      NS      k.root-servers.net.
.                       518394  IN      NS      l.root-servers.net.
.                       518394  IN      NS      m.root-servers.net.
.                       518394  IN      NS      a.root-servers.net.
.                       518394  IN      NS      b.root-servers.net.
.                       518394  IN      NS      c.root-servers.net.
.                       518394  IN      NS      d.root-servers.net.
.                       518394  IN      NS      e.root-servers.net.
.                       518394  IN      NS      f.root-servers.net.
.                       518394  IN      NS      g.root-servers.net.
.                       518394  IN      NS      h.root-servers.net.
.                       518394  IN      NS      i.root-servers.net.
;; Received 512 bytes from in 1 ms

com.                    172800  IN      NS      h.gtld-servers.net.
com.                    172800  IN      NS      g.gtld-servers.net.
com.                    172800  IN      NS      e.gtld-servers.net.
com.                    172800  IN      NS      j.gtld-servers.net.
com.                    172800  IN      NS      c.gtld-servers.net.
com.                    172800  IN      NS      l.gtld-servers.net.
com.                    172800  IN      NS      d.gtld-servers.net.
com.                    172800  IN      NS      i.gtld-servers.net.
com.                    172800  IN      NS      m.gtld-servers.net.
com.                    172800  IN      NS      f.gtld-servers.net.
com.                    172800  IN      NS      k.gtld-servers.net.
com.                    172800  IN      NS      b.gtld-servers.net.
com.                    172800  IN      NS      a.gtld-servers.net.
;; Received 497 bytes from in 112 ms

dyn.com.                172800  IN      NS      ns1.p01.dynect.net.
dyn.com.                172800  IN      NS      ns3.p01.dynect.net.
dyn.com.                172800  IN      NS      ns2.p01.dynect.net.
dyn.com.                172800  IN      NS      ns4.p01.dynect.net.
;; Received 175 bytes from in 167 ms

dig: couldn't get address for 'ns1.p01.dynect.net': failure

Thank you

Best Regards
Samir Abid Ali
Core Network Manager
Gorannet ISP
Office:053 5111 000 ext. 1032

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