Linux

Before you begin, take note of any DNS addresses you might have set up, and save them in a safe place in case you need to use them later.

Consider the sections below to set up 1.1.1.1 using either the command line interface (CLI) or a graphical user interface (GUI) of your preference.

Use command line interface (CLI)

Choose whether you want to use 1.1.1.1 or 1.1.1.1 For Families, and replace 1.1.1.1 with the corresponding IPv4 or IPv6 address accordingly.

Usually, /etc/resolv.conf is where you can configure the resolver IPs that your system is using.

In that case, you can use the following one-line command to specify 1.1.1.1 as your DNS resolver and 1.0.0.1 as backup:

echo -e "nameserver 1.1.1.1\nnameserver 1.0.0.1" | sudo tee /etc/resolv.conf

Alternatively, you can use an editor (nano or vim, for example) to manually edit the file.

If you use systemd-resolved utility and the resolver IPs configuration is in /etc/systemd/resolved.conf, consider the steps below:

sudo <EDITOR> /etc/systemd/resolved.conf

[Resolve]
DNS=1.1.1.1

To use DNS over TLS, add #one.one.one.one and set DNSOverTLS to yes, as in the following example:

[Resolve]
DNS=1.1.1.1#one.one.one.one
DNSOverTLS=yes

Go to Show Applications > Settings > Network.
Select the adapter you want to configure — like your Ethernet adapter or Wi-Fi card — and select the Settings button.
On the IPv4 tab > DNS section, disable the Automatic toggle.
Depending on what you want to configure, choose one of the following DNS addresses for IPv4:
Use 1.1.1.1 resolver
```
1.1.1.1
1.0.0.1
```
Block malware with 1.1.1.1 for Families
```
1.1.1.2
1.0.0.2
```
Block malware and adult content with 1.1.1.1 for Families
```
1.1.1.3
1.0.0.3
```
Go to IPv6.
Depending on what you want to configure, choose one of the following DNS addresses for IPv6:
Use 1.1.1.1 resolver
```
2606:4700:4700::1111
2606:4700:4700::1001
```
Block malware with 1.1.1.1 for Families
```
2606:4700:4700::1112
2606:4700:4700::1002
```
Block malware and adult content with 1.1.1.1 for Families
```
2606:4700:4700::1113
2606:4700:4700::1003
```
Select Apply.

Go to System Settings > Wi-Fi & Internet > Wi-Fi & Networking. (or Connections, if on Plasma 5)
Select the connection you want to configure - like your current connected network.
On the IPv4 tab, select the Method drop-down menu > Automatic (Only addresses).
Select the text box next to DNS servers.
Depending on what you want to configure, choose one of the following DNS addresses for IPv4:
Use 1.1.1.1 resolver
```
1.1.1.1
1.0.0.1
```
Block malware with 1.1.1.1 for Families
```
1.1.1.2
1.0.0.2
```
Block malware and adult content with 1.1.1.1 for Families
```
1.1.1.3
1.0.0.3
```
On the IPv6 tab, select the Method drop-down menu > Automatic (Only addresses).
Select the text box next to DNS servers.
Depending on what you want to configure, choose one of the following DNS addresses for IPv6:
Use 1.1.1.1 resolver
```
2606:4700:4700::1111
2606:4700:4700::1001
```
Block malware with 1.1.1.1 for Families
```
2606:4700:4700::1112
2606:4700:4700::1002
```
Block malware and adult content with 1.1.1.1 for Families
```
2606:4700:4700::1113
2606:4700:4700::1003
```
Select Apply.