Reverse DNS is the process of using DNS to translate IP addresses to
hostnames. Reverse DNS is the opposite of Forward DNS, which is used to
translate hostnames to IP addresses.
One way to see reverse DNS at work is to use nslookup a tool on most OS’s.
Let’s use `nslookup` to do a forward and reverse DNS lookup on redhat.com:
##FORWARD LOOKUP
[phil@ns1 ~]$ nslookup redhat.com
Server: ...
Configuring Reverse DNS in BIND 9
Continue reading Configuring Reverse DNS in BIND 9