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DNS: Configure a Caching Only Name Server

Creating a caching-only name server is the most basic type of BIND configuration. This configuration is the main building block for more advanced BIND configurations. Students will learn to configure a caching-only name server and test name resolution with the `nslookup` command.

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Path Info

Level
Clock icon Beginner
Duration
Clock icon 15m
Published
Clock icon May 01, 2020

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Table of Contents

  1. Challenge

    Log in to the lab server with the `cloud_user` and issue `sudo -i` to gain root access. 

    $ ssh cloud_user@<"provided lab server IP">
Password:

    $ sudo -i
[sudo] password for cloud_user: 
# 
# id
uid=0(root) gid=0(root) groups=0(root) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023

  2. Challenge

    Install the `bind` and `bind-utils` packages.

    # yum install -y bind bind-utils

  3. Challenge

    Verify the `named` configuration for `localhost`. Then check the configuration for syntax errors with the `named-checkconf` command.

    # cat /etc/named.conf

    # named-checkconf

  4. Challenge

    Start and enable the `named` service.

    # systemctl start named
# systemctl enable named

  5. Challenge

    Run a DNS query against the DNS server defined in `/etc/resolv.conf`. Next, run a DNS query against `localhost`.

    # nslookup google.com

    # nslookup google.com localhost
A Cloud Guru - Labs - DNS: Configure a Caching Only Name Server
Author
A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

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