Configuring DNS settings on Ubuntu with Netplan
Since 18.04, Ubuntu started to utilize systemd-resolved for a name resolution, which means that setting DNS servers in /etc/resolv.conf file will no longer work. Now such changes needs to be done in Netplan configuration (which delegates name resolution to systemd-resolved.resolv.conf).
nano /etc/netplan/my-dns-config.yaml
Example: Assuming that we want to set public Cloudflare DNS for both IPv4 and IPv6 on an interface ens3
:
# This is my DNS config
network:
ethernets:
ens3:
dhcp4: true
dhcp4-overrides:
use-dns: false
nameservers:
addresses: [1.1.1.1, 1.0.0.1, 2606:4700:4700::1111, 2606:4700:4700::1001]
version: 2
Configuration test:
netplan --debug apply
Apply:
netplan apply
Check DNS settings with systemd-resolved:
systemd-resolve --status
Read other posts