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Updating DNS entries and static DHCP entries always seemed like a chore for me. Luckily, we can automate it. We will use DHCP to update/create entries in DNS. I used ISC BIND and ISC DHCP for my servers. DHCP Config File Add these lines to /etc/dhcp/dhcpd.conf. Don’t forget to change your mydomain.lan to your domain and use the correct reverse subnet IP. The primary 127.0.0.1 line can be changed to the IP of where your DNS server is if it isn’t running locally.