What Do You Need to Do to Get a RHEL Server to Be a DNS Server?

Problem scenario
You have a RHEL server in AWS.  You want it to be a DNS server.  What do you do?

Solution
For security reasons, you should have the network that this DNS server will serve be behind a firewall.  Following a short Question and Answer guide like this is fine for testing and learning.  However, denial of service attacks are more possible when a primary DNS server engages in recursive look ups (page 857 of A Practical Guide to Fedora and RedHat Enterprise Linux). Recursive queries involve a second query to a different DNS sever.  A non-recursive DNS query is called iterative.  The BIND service should run in a chroot jail as a precautionary measure for security (page 883 of A Practical Guide to Fedora and RedHat Enterprise Linux).

1. Run this:  sudo yum -y install bind bind-utils

2. Run these commands:

    sudo systemctl enable named.service
    sudo systemctl start named.service

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