#!/bin/sh
# Replace systemd-resolved with the Adult Filter DNS of https://cleanbrowsing.org/filters
set -e
sudo systemctl disable --now systemd-resolved
resolvconf="/etc/resolv.conf"
dns="nameserver 185.228.168.10
nameserver 185.228.169.11"
test "$(cat "$resolvconf" 2>/dev/null)" = "$dns" && exit 0
test -f "$resolvconf" && sudo chattr -i "$resolvconf" && sudo rm -vf "$resolvconf"
echo "$dns" | sudo tee "$resolvconf"
sudo chattr +i "$resolvconf"