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Labs

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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Labs

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
    

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