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IT 3100: Systems Design and Administration I

Domain Name System (DNS) Reverse Domain

Due according to the class schedule.


In this assignment you will modify your authoritative domain name servers to serve reverse DNS (PTR) records. You will register the reverse domain name with the registrar and configure IP to name translations in your authoritative servers.

Throughout the semester these servers must be functioning correctly. As systems are added, removed or changed in your domain, these servers must stay current.

Register a reverse domain

Identify the correct reverse zone for your ip addresses. Register your reverse domain name with the registrar.
Email the fully qualified domain names of your two name servers, and the name of your reverse zone to the instructor.

The format of this message should be two text lines of this form:
[ "", "", ],

Of course, substitute the correct information for your zone.
Note the trailing “.” on the hostnames. The subject must include IT3100 Reverse DNS.

Configure the master authoritative name server

Configure the master authoritative server to also be the master for your reverse domain.

Be sure to include PTR records for all A entries in your forward zone.

Configure the slave authoritative name server

Configure the slave authoritative server to transfer the reverse zone data from the master.


The following details are required:


Verify that your domain is being served correctly. There are at least the following cases to consider:

Check for combinations and look for the correct results.

Submission File Format

The submission file is a UNIX text file, and must have this format, exactly!

The file must be named dns_info.txt.

master:  ip_address_of_your_master
slave:   ip_address_of_your_slave
domain:  name.of.your.domain
ns1:     name.of.your.ns1
ns2:     name.of.your.ns2
reverse: name.of.your.reverse.domain

For example, my file would look like this:


Submission and Passoff

Last Updated 08/07/2020