135 lines
3.4 KiB
Nix
135 lines
3.4 KiB
Nix
{ config, lib, pkgs, ... }:
|
|
|
|
with lib;
|
|
|
|
let
|
|
|
|
cfg = config.services.unbound;
|
|
|
|
stateDir = "/var/lib/unbound";
|
|
|
|
access = concatMapStringsSep "\n " (x: "access-control: ${x} allow") cfg.allowedAccess;
|
|
|
|
interfaces = concatMapStringsSep "\n " (x: "interface: ${x}") cfg.interfaces;
|
|
|
|
isLocalAddress = x: substring 0 3 x == "::1" || substring 0 9 x == "127.0.0.1";
|
|
|
|
forward =
|
|
optionalString (any isLocalAddress cfg.forwardAddresses) ''
|
|
do-not-query-localhost: no
|
|
'' +
|
|
optionalString (cfg.forwardAddresses != []) ''
|
|
forward-zone:
|
|
name: .
|
|
'' +
|
|
concatMapStringsSep "\n" (x: " forward-addr: ${x}") cfg.forwardAddresses;
|
|
|
|
rootTrustAnchorFile = "${stateDir}/root.key";
|
|
|
|
trustAnchor = optionalString cfg.enableRootTrustAnchor
|
|
"auto-trust-anchor-file: ${rootTrustAnchorFile}";
|
|
|
|
confFile = pkgs.writeText "unbound.conf" ''
|
|
server:
|
|
directory: "${stateDir}"
|
|
username: unbound
|
|
chroot: "${stateDir}"
|
|
pidfile: ""
|
|
${interfaces}
|
|
${access}
|
|
${trustAnchor}
|
|
${cfg.extraConfig}
|
|
${forward}
|
|
'';
|
|
|
|
in
|
|
|
|
{
|
|
|
|
###### interface
|
|
|
|
options = {
|
|
services.unbound = {
|
|
|
|
enable = mkEnableOption "Unbound domain name server";
|
|
|
|
allowedAccess = mkOption {
|
|
default = [ "127.0.0.0/24" ];
|
|
type = types.listOf types.str;
|
|
description = "What networks are allowed to use unbound as a resolver.";
|
|
};
|
|
|
|
interfaces = mkOption {
|
|
default = [ "127.0.0.1" "::1" ];
|
|
type = types.listOf types.str;
|
|
description = "What addresses the server should listen on.";
|
|
};
|
|
|
|
forwardAddresses = mkOption {
|
|
default = [ ];
|
|
type = types.listOf types.str;
|
|
description = "What servers to forward queries to.";
|
|
};
|
|
|
|
enableRootTrustAnchor = mkOption {
|
|
default = true;
|
|
type = types.bool;
|
|
description = "Use and update root trust anchor for DNSSEC validation.";
|
|
};
|
|
|
|
extraConfig = mkOption {
|
|
default = "";
|
|
type = types.lines;
|
|
description = ''
|
|
Extra unbound config. See
|
|
<citerefentry><refentrytitle>unbound.conf</refentrytitle><manvolnum>8
|
|
</manvolnum></citerefentry>.
|
|
'';
|
|
};
|
|
|
|
};
|
|
};
|
|
|
|
###### implementation
|
|
|
|
config = mkIf cfg.enable {
|
|
|
|
environment.systemPackages = [ pkgs.unbound ];
|
|
|
|
users.users.unbound = {
|
|
description = "unbound daemon user";
|
|
isSystemUser = true;
|
|
};
|
|
|
|
systemd.services.unbound = {
|
|
description = "Unbound recursive Domain Name Server";
|
|
after = [ "network.target" ];
|
|
before = [ "nss-lookup.target" ];
|
|
wants = [ "nss-lookup.target" ];
|
|
wantedBy = [ "multi-user.target" ];
|
|
|
|
preStart = ''
|
|
mkdir -m 0755 -p ${stateDir}/dev/
|
|
cp ${confFile} ${stateDir}/unbound.conf
|
|
${optionalString cfg.enableRootTrustAnchor ''
|
|
${pkgs.unbound}/bin/unbound-anchor -a ${rootTrustAnchorFile} || echo "Root anchor updated!"
|
|
chown unbound ${stateDir} ${rootTrustAnchorFile}
|
|
''}
|
|
touch ${stateDir}/dev/random
|
|
${pkgs.utillinux}/bin/mount --bind -n /dev/urandom ${stateDir}/dev/random
|
|
'';
|
|
|
|
serviceConfig = {
|
|
ExecStart = "${pkgs.unbound}/bin/unbound -d -c ${stateDir}/unbound.conf";
|
|
ExecStopPost="${pkgs.utillinux}/bin/umount ${stateDir}/dev/random";
|
|
|
|
ProtectSystem = true;
|
|
ProtectHome = true;
|
|
PrivateDevices = true;
|
|
};
|
|
};
|
|
|
|
};
|
|
|
|
}
|