DNS via Bind for local Resolution on Ubuntu 18.04 #

On Host System #

on the system you want to host bind, you need to make sure that port 53 is not in use:
Disable and stop the systemd-resolved service:

    sudo systemctl disable systemd-resolved.service
    sudo systemctl stop systemd-resolved

Then put the following line in the [main] section of your /etc/NetworkManager/NetworkManager.conf:

    dns=default

    sudo rm /etc/resolv.conf

    sudo service network-manager restart

You can run this DNS container locally without having to worry to affect any corporate DNS server that are given to you via DHCP.
Add the following line to the very beginning to /etc/dhcp/dhclient.conf:

    prepend domain-name-servers 127.0.0.1;

    # Via service command
    sudo service network-manager restart

    # Or the systemd way
    sudo systemctl restart network-manager

This will make sure that whenever your /etc/resolv.conf is deployed, you will have 127.0.0.1 as the first entry and also make use of any other DNS server which are deployed via the LAN’s DHCP server.
- If cytopia/bind is not running, it does not affect the name resolution, because you will still have entries in /etc/resolv.conf.
be sure that dns comes before mdns4_minimal in /etc/nsswitch.conf:

ie.

    hosts: files dns mdns4_minimal [NOTFOUND=return]

rather than

    hosts: files mdns4_minimal [NOTFOUND=return] dns