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DNS: DNS Querying

Name service queries are essential in retrieving information stored in DNS records. We will be using the tools in the `bind-utils` package to perform these requests. In this hands-on lab, we will perform name service queries using the `nslookup`, `host,` and `dig` commands.

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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

    Install the bind and bind-utils Packages with yum, Then Start and Enable the named Service

    # yum install -y bind bind-utils

    # systemctl start named

    # systemctl enable named

  2. Challenge

    Use the host Command to Display the Name Servers for the Domain, google.com

    # host -t ns google.com

  3. Challenge

    Use the host Command to Display the Mail Servers for google.com

    # host -t mx google.com

  4. Challenge

    Resolve the IP Address for ns4.google.com Using the nslookup Command

    # nslookup ns4.google.com

  5. Challenge

    Use the nslookup Command to List the Name Servers for google.com

    # nslookup -type=ns google.com

  6. Challenge

    Use the nslookup Command to List the Mail Servers Responsible for Mail Exchange for google.com

    # nslookup -query=mx google.com

  7. Challenge

    Use the Debug Mode for nslookup to Provide more Details for google.com

    # nslookup -debug google.com

  8. Challenge

    Use the dig Command to Resolve the IP for google.com

    # dig google.com

  9. Challenge

    Use the dig Command to List the Name Servers for google.com

    # dig ns google.com

  10. Challenge

    Using dig, List Only the 4 NS Records for google.com

    # dig ns google.com +noall +answer
A Cloud Guru - Labs - DNS: DNS Querying
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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