dig命令

1. 查询A记录

 

[root@localhost ~]# dig www.newegg.com.cn

; <<>> DiG 9.3.6-P1-RedHat-9.3.6-4.P1.el5 <<>> www.newegg.com.cn
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 47967
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.newegg.com.cn.             IN      A

;; ANSWER SECTION:
www.newegg.com.cn.      467     IN      CNAME   www.newegg.cloudex.net.
www.newegg.cloudex.net. 467     IN      CNAME   www1.newegg.gslb.cloudex.net.
www1.newegg.gslb.cloudex.net. 167 IN    A       210.14.67.180

;; Query time: 12 msec
;; SERVER: 10.130.170.50#53(10.130.170.50)
;; WHEN: Fri Apr  1 08:53:15 2011
;; MSG SIZE  rcvd: 118

2. 查询NS记录

 

[root@localhost ~]# dig newegg.com.cn ns

; <<>> DiG 9.3.6-P1-RedHat-9.3.6-4.P1.el5 <<>> newegg.com.cn ns
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 31745
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;newegg.com.cn.                 IN      NS

;; ANSWER SECTION:
newegg.com.cn.          600     IN      NS      ns2.newegg.com.cn.
newegg.com.cn.          600     IN      NS      dns.magnellmail.net.
newegg.com.cn.          600     IN      NS      ns1.newegg.com.cn.

;; Query time: 20 msec
;; SERVER: 10.130.170.50#53(10.130.170.50)
;; WHEN: Fri Apr  1 09:04:22 2011
;; MSG SIZE  rcvd: 100

3. 查询SOA记录

[root@localhost ~]# dig newegg.com.cn soa

;; QUESTION SECTION:
;newegg.com.cn.                 IN      SOA

;; ANSWER SECTION:
newegg.com.cn.          600     IN      SOA     ns1.newegg.com.cn. it. 349 900 600 172800 600

4. 查找授权dns服务器

[root@localhost ~]# dig newegg.com.cn +nssearch
SOA ns1.newegg.com.cn. it. 349 900 600 172800 600 from server ns2.newegg.com.cn in 251 ms.
SOA ns1.newegg.com.cn. it. 349 900 600 172800 600 from server ns1.newegg.com.cn in 3 ms.
SOA dns1.magnellmail.net. it. 299 900 600 172800 600 from server dns.magnellmail.net in 284 ms.

5.  从根服务器追踪解析

[root@localhost ~]# dig www.newegg.com.cn +trace
www.newegg.com.cn +trace
;; global options:  printcmd
.                       3600    IN      NS      k.root-servers.net.
.                       3600    IN      NS      j.root-servers.net.
.                       3600    IN      NS      i.root-servers.net.
.                       3600    IN      NS      h.root-servers.net.
.                       3600    IN      NS      g.root-servers.net.
.                       3600    IN      NS      f.root-servers.net.
.                       3600    IN      NS      e.root-servers.net.
.                       3600    IN      NS      d.root-servers.net.
.                       3600    IN      NS      c.root-servers.net.
.                       3600    IN      NS      b.root-servers.net.
.                       3600    IN      NS      a.root-servers.net.
.                       3600    IN      NS      m.root-servers.net.
.                       3600    IN      NS      l.root-servers.net.
;; Received 505 bytes from 10.130.170.50#53(10.130.170.50) in 4 ms

cn.                     172800  IN      NS      b.dns.cn.
cn.                     172800  IN      NS      ns.cernet.net.
cn.                     172800  IN      NS      c.dns.cn.
cn.                     172800  IN      NS      a.dns.cn.
cn.                     172800  IN      NS      e.dns.cn.
cn.                     172800  IN      NS      d.dns.cn.
;; Received 298 bytes from 192.58.128.30#53(j.root-servers.net) in 34 ms

newegg.com.cn.          21600   IN      NS      ns2.newegg.com.cn.
newegg.com.cn.          21600   IN      NS      ns1.newegg.com.cn.
;; Received 103 bytes from 203.119.26.1#53(b.dns.cn) in 62 ms

www.newegg.com.cn.      600     IN      CNAME   www.newegg.cloudex.net.
www.newegg.cloudex.net. 455     IN      CNAME   www1.newegg.gslb.cloudex.net.
;; Received 102 bytes from 222.73.69.44#53(ns2.newegg.com.cn) in 3 ms

6. 在指定dns服务器查询

[root@localhost ~]# dig @202.96.209.133 www.newegg.com.cn

; <<>> DiG 9.3.6-P1-RedHat-9.3.6-4.P1.el5 <<>> @202.96.209.133 www.newegg.com.cn
; (1 server found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 54006
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.newegg.com.cn.             IN      A

;; ANSWER SECTION:
www.newegg.com.cn.      534     IN      CNAME   www.newegg.cloudex.net.
www.newegg.cloudex.net. 534     IN      CNAME   www1.newegg.gslb.cloudex.net.
www1.newegg.gslb.cloudex.net. 234 IN    A       210.14.67.180

;; Query time: 4 msec
;; SERVER: 202.96.209.133#53(202.96.209.133)
;; WHEN: Fri Apr  1 09:16:21 2011
;; MSG SIZE  rcvd: 118