Why does not "dig" work?

[HeePok Lee]

Hi all!
When I use "dig" command on my server(203.248.240.x), it doesn't work.
But when I use "nslookup" command, it does work.
What makes these difference?
Could you explain this problem?
Thank you!!!!

When I use dig :
[root cidr]# dig @ns.pubnetplus.ne.kr www.cisco.com a

; <<>> DiG 8.2 <<>> @ns.pubnetplus.ne.kr www.cisco.com a
; (1 server found)
;; res options: init recurs defnam dnsrch
;; res_nsend to server ns.pubnetplus.ne.kr  210.220.16.7: Connection timed out

When I use nslookup :
> server ns.pubnetplus.ne.kr
Default Server:  ns.pubnetplus.ne.kr
Address:  210.220.16.7

> www.cisco.com.
Server:  ns.pubnetplus.ne.kr
Address:  210.220.16.7

Non-authoritative answer:
Name:    www.cisco.com
Address:  198.133.219.25

 

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