User Manual

USER MANUAL

Peplink Balance Series

14.6 Reverse Lookup Zones

Reverse lookup refers to performing a DNS query to find one or more DNS names associated with a

given IP address.

The DNS stores IP addresses in the form of specially formatted names as pointer (PTR) records using

special domains/zones. The zone is in-addr.arpa.

To enable DNS clients to perform a reverse lookup for a host, perform two steps:

Create a Reverse Lookup Zone that corresponds to the subnet network address of the host.

In the Reverse Lookup Zone, add a pointer (PTR) resource record that maps the host IP address to the

host name.

Click the New Reverse Lookup Zone button and enter a Reverse Lookup Zone Name. If you are

delegated the subnet 11.22.33.0/24, the Zone Name should be 33.22.11.in-arpa.addr. PTR records for

11.22.33.1, 11.22.33.2, ... 11.22.33.254 should be defined in this zone where the Host IP Numbers are 1,

2, ... 254 respectively.