From def2055775680024eb927e21068f6b861ae377c8 Mon Sep 17 00:00:00 2001
From: clerie <git@clerie.de>
Date: Thu, 8 Aug 2024 20:02:57 +0200
Subject: [PATCH] hosts/carbon: Add net-iot

---
 hosts/carbon/configuration.nix |  1 +
 hosts/carbon/net-iot.nix       | 69 ++++++++++++++++++++++++++++++++++
 2 files changed, 70 insertions(+)
 create mode 100644 hosts/carbon/net-iot.nix

diff --git a/hosts/carbon/configuration.nix b/hosts/carbon/configuration.nix
index b97e2fe..c9cc78f 100644
--- a/hosts/carbon/configuration.nix
+++ b/hosts/carbon/configuration.nix
@@ -10,6 +10,7 @@
       ./net-dsl.nix
       ./net-gastnetz.nix
       ./net-heimnetz.nix
+      ./net-iot.nix
       ./net-lte.nix
       ./net-voip.nix
       ./ppp.nix
diff --git a/hosts/carbon/net-iot.nix b/hosts/carbon/net-iot.nix
new file mode 100644
index 0000000..be18bfc
--- /dev/null
+++ b/hosts/carbon/net-iot.nix
@@ -0,0 +1,69 @@
+{ ... }:
+
+{
+
+  networking.vlans."enp1s0.205" = {
+    id = 205;
+    interface = "enp1s0";
+  };
+  networking.bridges."net-iot".interfaces = [
+    "enp1s0.205"
+  ];
+  networking.interfaces."net-iot".ipv6.addresses = [
+    { address = "fe80::1"; prefixLength = 64; }
+    { address = "fd00:152:152:205::1"; prefixLength = 64; }
+  ];
+  networking.interfaces."net-iot".ipv4.addresses = [
+    { address = "10.152.205.1"; prefixLength = 24; }
+  ];
+
+  services.radvd.config = ''
+    interface net-iot {
+      AdvSendAdvert on;
+      prefix fd00:152:152:205::/64 {};
+      RDNSS fd00:152:152::1 {};
+      DNSSL iot.clerie.de {};
+    };
+  '';
+
+  services.kea.dhcp4 = {
+    settings = {
+      interfaces-config = {
+        interfaces = [ "net-iot" ];
+      };
+      subnet4 = [
+        {
+          id = 205;
+          subnet = "10.152.205.0/24";
+          pools = [
+            {
+              pool = "10.152.205.100 - 10.152.205.240";
+            }
+          ];
+          option-data = [
+            {
+              name = "routers";
+              data = "10.152.205.1";
+            }
+            {
+              name = "domain-name-servers";
+              data = "10.152.0.1";
+            }
+            {
+              name = "domain-name";
+              data = "iot.clerie.de";
+            }
+          ];
+        }
+      ];
+    };
+  };
+
+  clerie.firewall.extraForwardFilterCommands = ''
+    # Allow access from Heimnetz to IOT devices
+    ip46tables -A forward-filter -i net-heimnetz -o net-iot -j ACCEPT
+    ip46tables -A forward-filter -i net-iot -j DROP
+    ip46tables -A forward-filter -o net-iot -j DROP
+  '';
+
+}