From 8febb2fad131dc1ff42a2c667b26b013d64c17b8 Mon Sep 17 00:00:00 2001
From: sinanmohd <sinan@sinanmohd.com>
Date: Sat, 1 Jun 2024 19:25:59 +0530
Subject: repo: ./nixos -> ./os

---
 os/kay/modules/dns/default.nix | 137 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 137 insertions(+)
 create mode 100644 os/kay/modules/dns/default.nix

(limited to 'os/kay/modules/dns/default.nix')

diff --git a/os/kay/modules/dns/default.nix b/os/kay/modules/dns/default.nix
new file mode 100644
index 0000000..1146cc3
--- /dev/null
+++ b/os/kay/modules/dns/default.nix
@@ -0,0 +1,137 @@
+{ config, pkgs, ... }: let
+  listen_addr = "2001:470:ee65::1";
+
+  acmeSOA = pkgs.writeText "acmeSOA" ''
+    $TTL 2d
+
+    @	IN	SOA	ns1.sinanmohd.com.	sinan.sinanmohd.com. (
+                        2024020505 ; serial
+                        2h         ; refresh
+                        5m         ; retry
+                        1d         ; expire
+                        5m )       ; nx ttl
+
+        IN	NS	ns1.sinanmohd.com.
+  '';
+in {
+  imports = [ ./ddns.nix ];
+
+  networking.firewall = {
+    allowedTCPPorts = [ 53 ];
+    allowedUDPPorts = [ 53 ];
+  };
+
+  sops.secrets.dns = {
+    owner = config.systemd.services.knot.serviceConfig.User;
+    group = config.systemd.services.knot.serviceConfig.Group;
+  };
+
+  services.knot = {
+    enable = true;
+    keyFiles = [ config.sops.secrets.dns.path ];
+
+    settings = {
+      server.listen = listen_addr;
+
+      remote = [
+        {
+          id = "ns1.he.net";
+          address = [ "2001:470:100::2" "216.218.130.2" ];
+          via = "2001:470:ee65::1";
+        }
+        {
+          id = "m.gtld-servers.net";
+          address = [ "2001:501:b1f9::30"  "192.55.83.30" ];
+        }
+      ];
+
+      submission = [{
+        id = "gtld-servers.net";
+        parent = "m.gtld-servers.net";
+      }];
+
+      policy = [{
+        id = "gtld-servers.net";
+        algorithm = "ecdsap384sha384";
+        ksk-lifetime = "365d";
+        ksk-submission = "gtld-servers.net";
+      }];
+
+      # generate TSIG key with keymgr -t name
+      acl = [
+        {
+          id = "ns1.he.net";
+          key = "ns1.he.net";
+          address = [ "2001:470:600::2" "216.218.133.2" ];
+          action = "transfer";
+        }
+        {
+          id = "localhost";
+          address = [ listen_addr ];
+          update-type = [ "A" "AAAA" ];
+          action = "update";
+        }
+        {
+          id = "acme";
+          address = [ listen_addr ];
+          update-type = [ "TXT" ];
+          action = "update";
+        }
+      ];
+
+      mod-rrl = [{
+        id = "default";
+        rate-limit = 200;
+        slip = 2;
+      }];
+
+      template = [
+        {
+          id = "default";
+          semantic-checks = "on";
+          global-module = "mod-rrl/default";
+        }
+        {
+          id = "master";
+          semantic-checks = "on";
+
+          dnssec-signing = "on";
+          dnssec-policy = "gtld-servers.net";
+
+          notify = [ "ns1.he.net" ];
+          acl = [ "ns1.he.net" "localhost" ];
+
+          zonefile-sync = "-1";
+          zonefile-load = "difference";
+        }
+        {
+          id = "acme";
+          semantic-checks = "on";
+          acl = [ "acme" ];
+
+          zonefile-sync = "-1";
+          zonefile-load = "difference";
+          journal-content = "changes";
+        }
+      ];
+
+      zone = [
+        {
+          domain = "sinanmohd.com";
+          file = ./sinanmohd.com.zone;
+          template = "master";
+        }
+        {
+          domain = "_acme-challenge.sinanmohd.com";
+          file = acmeSOA;
+          template = "acme";
+        }
+        {
+          domain = "5.6.e.e.0.7.4.0.1.0.0.2.ip6.arpa";
+          file = ./5.6.e.e.0.7.4.0.1.0.0.2.ip6.arpa.zone;
+        }
+      ];
+    };
+  };
+
+}
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