I'd like to take advantage of the recent Cloudflare 1.1.1.1 DNS service on my Ubuntu 16.04 based server. Any ideas how can I implement it permanently?
The reason is that
/etc/resolv.conf
changes automatically and as the file states we shouldn't edit it manually.
What the best way to do so, for both ipv4 and ipv6?
This is more or less "how do I set a static IP"
Follow this answer for a similar question on Ubuntu 12.04 which is more or less identical in application.
The relevant bit is your Name server
How do I configure my DNS settings in Ubuntu server?
Though in keeping with many concerns of links relevant info from that question, the correct file your looking for is
/etc/network/interfaces
and the part to modify should look similar to this
The primary network interface
auto eth0
iface eth0 inet static
address 192.168.X.X
netmask 255.255.255.0
gateway 192.168.X.X
dns-nameservers 1.1.1.1
This is the officially suggested method for changing/adding name servers from Ubuntu main help guides.
https://help.ubuntu.com/lts/serverguide/network-configuration.html#name-resolution
To configure the resolver, add the IP addresses of the nameservers that are appropriate for your network in the file /etc/network/interfaces.
