dns相关之dig

雨点打透心脏的1/2处 2022-06-10 00:40 203阅读 0赞

dig 解析域名

➜  ~ dig +trace www.baidu.com
    
    ; <<>> DiG 9.8.3-P1 <<>> +trace www.baidu.com
    ;; global options: +cmd
    .           427192  IN  NS  l.root-servers.net.
    .           427192  IN  NS  b.root-servers.net.
    .           427192  IN  NS  e.root-servers.net.
    .           427192  IN  NS  j.root-servers.net.
    .           427192  IN  NS  a.root-servers.net.
    .           427192  IN  NS  k.root-servers.net.
    .           427192  IN  NS  m.root-servers.net.
    .           427192  IN  NS  d.root-servers.net.
    .           427192  IN  NS  c.root-servers.net.
    .           427192  IN  NS  h.root-servers.net.
    .           427192  IN  NS  i.root-servers.net.
    .           427192  IN  NS  f.root-servers.net.
    .           427192  IN  NS  g.root-servers.net.
    ;; Received 494 bytes from 211.100.225.34#53(211.100.225.34) in 127 ms
    
    com.            172800  IN  NS  a.gtld-servers.net.
    com.            172800  IN  NS  b.gtld-servers.net.
    com.            172800  IN  NS  c.gtld-servers.net.
    com.            172800  IN  NS  d.gtld-servers.net.
    com.            172800  IN  NS  e.gtld-servers.net.
    com.            172800  IN  NS  f.gtld-servers.net.
    com.            172800  IN  NS  g.gtld-servers.net.
    com.            172800  IN  NS  h.gtld-servers.net.
    com.            172800  IN  NS  i.gtld-servers.net.
    com.            172800  IN  NS  j.gtld-servers.net.
    com.            172800  IN  NS  k.gtld-servers.net.
    com.            172800  IN  NS  l.gtld-servers.net.
    com.            172800  IN  NS  m.gtld-servers.net.
    ;; Received 491 bytes from 192.203.230.10#53(192.203.230.10) in 306 ms
    
    baidu.com.      172800  IN  NS  dns.baidu.com.
    baidu.com.      172800  IN  NS  ns2.baidu.com.
    baidu.com.      172800  IN  NS  ns3.baidu.com.
    baidu.com.      172800  IN  NS  ns4.baidu.com.
    baidu.com.      172800  IN  NS  ns7.baidu.com.
    ;; Received 201 bytes from 192.26.92.30#53(192.26.92.30) in 160 ms
    
    www.baidu.com.      1200    IN  CNAME   www.a.shifen.com.
    a.shifen.com.       1200    IN  NS  ns5.a.shifen.com.
    a.shifen.com.       1200    IN  NS  ns4.a.shifen.com.
    a.shifen.com.       1200    IN  NS  ns2.a.shifen.com.
    a.shifen.com.       1200    IN  NS  ns3.a.shifen.com.
    a.shifen.com.       1200    IN  NS  ns1.a.shifen.com.
    ;; Received 228 bytes from 220.181.37.10#53(220.181.37.10) in 46 ms

➜  ~ dig -t mx www.baidu.com
    
    ; <<>> DiG 9.8.3-P1 <<>> -t mx www.baidu.com
    ;; global options: +cmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 25744
    ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0
    
    ;; QUESTION SECTION:
    ;www.baidu.com. IN MX
    
    ;; ANSWER SECTION:
    www.baidu.com.      673 IN  CNAME   www.a.shifen.com.
    
    ;; AUTHORITY SECTION:
    a.shifen.com.       600 IN  SOA ns1.a.shifen.com. baidu_dns_master.baidu.com. 1708040010 5 5 86400 3600
    
    ;; Query time: 13 msec
    ;; SERVER: 211.100.225.34#53(211.100.225.34)
    ;; WHEN: Sun Aug 6 17:39:28 2017
    ;; MSG SIZE rcvd: 115

➜  ~ dig -x  www.baidu.com 
    
    ; <<>> DiG 9.8.3-P1 <<>> -x www.baidu.com
    ;; global options: +cmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 53115
    ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
    
    ;; QUESTION SECTION:
    ;com.baidu.www.in-addr.arpa.    IN  PTR
    
    ;; AUTHORITY SECTION:
    in-addr.arpa.       3600    IN  SOA b.in-addr-servers.arpa. nstld.iana.org. 2017042886 1800 900 604800 3600
    
    ;; Query time: 160 msec
    ;; SERVER: 211.100.225.34#53(211.100.225.34)
    ;; WHEN: Sun Aug  6 17:38:28 2017
    ;; MSG SIZE  rcvd: 112

➜  ~ dig -t soa www.baidu.com
    
    ; <<>> DiG 9.8.3-P1 <<>> -t soa www.baidu.com
    ;; global options: +cmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 24061
    ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0
    
    ;; QUESTION SECTION:
    ;www.baidu.com. IN SOA
    
    ;; ANSWER SECTION:
    www.baidu.com.      788 IN  CNAME   www.a.shifen.com.
    
    ;; AUTHORITY SECTION:
    a.shifen.com.       600 IN  SOA ns1.a.shifen.com. baidu_dns_master.baidu.com. 1708040010 5 5 86400 3600
    
    ;; Query time: 20 msec
    ;; SERVER: 211.100.225.34#53(211.100.225.34)
    ;; WHEN: Sun Aug 6 17:37:33 2017
    ;; MSG SIZE rcvd: 115

**CName是别名**