感謝大大的指教
但是我剛才try
"dig 有問題的網址 + trace "會變這樣
; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.23.rc1.el6_5.1 <<>> worldphoto.org +trace
;; global options: +cmd
. 18616 IN NS f.root-servers.net.
. 18616 IN NS d.root-servers.net.
. 18616 IN NS g.root-servers.net.
. 18616 IN NS j.root-servers.net.
. 18616 IN NS i.root-servers.net.
. 18616 IN NS l.root-servers.net.
. 18616 IN NS c.root-servers.net.
. 18616 IN NS e.root-servers.net.
. 18616 IN NS k.root-servers.net.
. 18616 IN NS b.root-servers.net.
. 18616 IN NS h.root-servers.net.
. 18616 IN NS a.root-servers.net.
. 18616 IN NS m.root-servers.net.
;; Received 228 bytes from 8.8.8.8#53(8.8.8.

in 5165 ms
org. 172800 IN NS a0.org.afilias-nst.info.
org. 172800 IN NS b0.org.afilias-nst.org.
org. 172800 IN NS d0.org.afilias-nst.org.
org. 172800 IN NS c0.org.afilias-nst.info.
org. 172800 IN NS b2.org.afilias-nst.org.
org. 172800 IN NS a2.org.afilias-nst.info.
;; Received 434 bytes from 192.33.4.12#53(192.33.4.12) in 207 ms
worldphoto.org. 86400 IN NS ns1.redantdevelopment.com.
worldphoto.org. 86400 IN NS ns2.redantdevelopment.com.
;; Received 89 bytes from 199.249.120.1#53(199.249.120.1) in 444 ms
;; connection timed out; no servers could be reached
try
"dig @這台DNS的IP(不是localhost) 有問題的網址 + trace"
會變這樣
; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.23.rc1.el6_5.1 <<>> @這台DNS的IP worldphoto.org +trace
; (1 server found)
;; global options: +cmd
. 393636 IN NS g.root-servers.net.
. 393636 IN NS i.root-servers.net.
. 393636 IN NS l.root-servers.net.
. 393636 IN NS k.root-servers.net.
. 393636 IN NS h.root-servers.net.
. 393636 IN NS c.root-servers.net.
. 393636 IN NS a.root-servers.net.
. 393636 IN NS e.root-servers.net.
. 393636 IN NS b.root-servers.net.
. 393636 IN NS d.root-servers.net.
. 393636 IN NS j.root-servers.net.
. 393636 IN NS f.root-servers.net.
. 393636 IN NS m.root-servers.net.
;; Received 228 bytes from local DNS IP#53(local DNS IP) in 131 ms
org. 172800 IN NS d0.org.afilias-nst.org.
org. 172800 IN NS b2.org.afilias-nst.org.
org. 172800 IN NS b0.org.afilias-nst.org.
org. 172800 IN NS c0.org.afilias-nst.info.
org. 172800 IN NS a2.org.afilias-nst.info.
org. 172800 IN NS a0.org.afilias-nst.info.
;; Received 434 bytes from 192.58.128.30#53(192.58.128.30) in 186 ms
worldphoto.org. 86400 IN NS ns1.redantdevelopment.com.
worldphoto.org. 86400 IN NS ns2.redantdevelopment.com.
;; Received 89 bytes from 199.249.112.1#53(199.249.112.1) in 683 ms
;; connection timed out; no servers could be reached
好奇怪
dig 不加local DNS的IP是可以解析得到,但怎麼加trace 就有錯誤