Homelab/networking/adblock.nix
2025-09-26 04:19:40 +00:00

71 lines
1.8 KiB
Nix

{ config, lib, pkgs, ... }:
let
adblockLocalZones = pkgs.stdenv.mkDerivation {
name = "unbound-zones-adblock";
src = (pkgs.fetchFromGitHub {
owner = "StevenBlack";
repo = "hosts";
rev = "3.16.20";
sha256 = "sha256-z3VWoF5/evd0n97AmrWgSskaNqVaad0Ex2pn53JHkSk=";
} + "/hosts");
phases = [ "installPhase" ];
installPhase = ''
${pkgs.gawk}/bin/awk '{sub(/\r$/,"")} {sub(/^127\.0\.0\.1/,"0.0.0.0")} BEGIN { OFS = "" } NF == 2 && $1 == "0.0.0.0" { print "local-zone: \"", $2, "\" static"}' $src | tr '[:upper:]' '[:lower:]' | sort -u > $out
'';
};
in {
services.resolved.enable = false;
networking.firewall.allowedTCPPorts = [ 53 ];
networking.firewall.allowedUDPPorts = [ 53 ];
services.unbound = {
enable = true;
settings = {
server = {
port = 53;
interface = [ "0.0.0.0" "127.0.0.1" ];
access-control = [
"127.0.0.0/8 allow"
"10.0.0.0/8 allow"
"172.16.0.0/12 allow"
"192.168.0.0/16 allow"
];
include = [ "${adblockLocalZones}" ];
num-threads = 2;
so-reuseport = "yes";
hide-identity = "yes";
hide-version = "yes";
qname-minimisation = "yes";
harden-dnssec-stripped = "yes";
prefetch = "yes";
serve-expired = "yes";
rrset-roundrobin = "yes";
do-ip6 = "no";
do-udp = "yes";
do-tcp = "yes";
};
forward-zone = [{
name = ".";
forward-tls-upstream = "yes";
forward-addr = [
"1.1.1.1@853#cloudflare-dns.com"
"1.0.0.1@853#cloudflare-dns.com"
"8.8.8.8@853#dns.google"
"8.8.4.4@853#dns.google"
];
}];
};
};
networking.resolvconf.enable = false;
environment.etc."resolv.conf".text = ''
nameserver 127.0.0.1
options edns0
'';
}