Code:
dig www.ksu.edu.tw +short
120.114.100.101
We get ip address :120.114.100.101 ,whose domain name is
www.ksu.edu.tw .
To get domain name from ip in Reverse DNS Dig
Code:
dig -x 120.114.100.101 +short
www.ksu.edu.tw.
We get domain name :
www.ksu.edu.tw ,whose ip address is 120.114.100.101.
Code:
dig smtp.mail.yahoo.com +short
smtp.mail.global.gm0.yahoodns.net.
106.10.150.171
We get ip address :106.10.150.171 ,whose domain name is smtp.mail.yahoo.com.
Code:
dig -x 106.10.150.171 +short
vcs-s-myc.mail.vip.sg3.yahoo.com.
why the result is not smtp.mail.yahoo.com as 106.10.150.171's domain name?
