dns

modules/systems/networking/base/nixos.nix

@@ -1,12 +1,98 @@
 { lib, ... }:
-{
-  networking.nameservers = lib.mkDefault [
-    "1.1.1.1"
-    "1.0.0.1"
+let
+  dohPort = 5300;
+
+  dohLocalUpstream = "127.0.0.1#${toString dohPort}";
+
+  internalDns = [
     "10.50.80.53"
     "10.50.80.54"
+
+    # "fd00:50:80::53"
+    # "fd00:50:80::54"
   ];
 
-  services.resolved.enable = lib.mkDefault false;
-  security.pki.certificateFiles = [ ./root_ca.crt ];
+  internalZones = [
+    "app.homelabs.run"
+  ];
+
+  internalDnsServers = lib.concatMap (zone: map (dns: "/${zone}/${dns}") internalDns) internalZones;
+in
+{
+  services.resolved.enable = false;
+
+  networking.networkmanager.dns = "none";
+
+  services.dnscrypt-proxy = {
+    enable = true;
+
+    upstreamDefaults = true;
+
+    settings = {
+      listen_addresses = [
+        "127.0.0.1:${toString dohPort}"
+      ];
+
+      server_names = [
+        "cloudflare"
+        "cloudflare-ipv6"
+      ];
+
+      ipv4_servers = true;
+      ipv6_servers = true;
+
+      dnscrypt_servers = false;
+      doh_servers = true;
+      odoh_servers = false;
+
+      cache = false;
+
+      block_ipv6 = false;
+
+      ignore_system_dns = true;
+
+      bootstrap_resolvers = [
+        "9.9.9.11:53"
+        "149.112.112.11:53"
+        "[2620:fe::11]:53"
+        "[2620:fe::fe:11]:53"
+      ];
+
+      netprobe_address = "1.1.1.1:443";
+
+      timeout = 5000;
+      keepalive = 30;
+    };
+  };
+
+  services.dnsmasq = {
+    enable = true;
+
+    resolveLocalQueries = true;
+
+    settings = {
+      no-resolv = true;
+
+      local-service = "host";
+
+      server = [ dohLocalUpstream ] ++ internalDnsServers;
+
+      all-servers = true;
+
+      cache-size = 10000;
+
+      dns-loop-detect = true;
+      domain-needed = true;
+      bogus-priv = true;
+    };
+  };
+
+  systemd.services.dnsmasq = {
+    wants = [ "dnscrypt-proxy.service" ];
+    after = [ "dnscrypt-proxy.service" ];
+  };
+
+  security.pki.certificateFiles = [
+    ./root_ca.crt
+  ];
 }