Linux - How to test or check reverse dns or rdns, Find reverse DNS of an IP or host

How to test or check reverse dns or rdns

How do I test or check reverse DNS for given IP address under Linux or Windows XP/Server 2003?

The reverse DNS or RDNS is the process to determine the hostname associated with a given IP Address.

The most common uses of the RDNS are:
=> Anti-spam
=> Network troubleshooting
=> Avoid spammers and phishers using a forward confirmed reverse DNS etc

You can find the RDNS using Linux or Unix command like dig, nslookup or host.

# host w3calculator.com

OUTPUT:
  w3calculator.com has address 174.34.163.101

# host 174.34.163.101

OUTPUT:
101.163.34.174.in-addr.arpa domain name pointer reseller01.zestservers.com.

# nslookup 174.34.163.101

# dig +short -x 174.34.163.101

# dig -x IPAddress

All the above command will fetch you the RDNS or reverse DNS. dig command is most commonly used by the linux administrators.

The nslookup command can be used find the reverse DNS under Linux or Windows XP/Server 2003.

The topic on Linux - How to test or check reverse dns or rdns is posted by - Patel

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