From 386ecf3d14ea486aba523b14200fcd2e7e04b9d6 Mon Sep 17 00:00:00 2001
From: Seth Flynn <getchoo@tuta.io>
Date: Thu, 13 Feb 2025 16:54:19 -0500
Subject: nixos: make more "traits" mixins

---
 modules/nixos/mixins/tailscale.nix | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 modules/nixos/mixins/tailscale.nix

(limited to 'modules/nixos/mixins/tailscale.nix')

diff --git a/modules/nixos/mixins/tailscale.nix b/modules/nixos/mixins/tailscale.nix
new file mode 100644
index 0000000..177aa90
--- /dev/null
+++ b/modules/nixos/mixins/tailscale.nix
@@ -0,0 +1,34 @@
+{
+  config,
+  lib,
+  ...
+}:
+
+let
+  cfg = config.services.tailscale;
+
+  usingTailscaleSSH = lib.elem "--ssh" config.services.tailscale.extraUpFlags;
+in
+
+{
+  config = lib.mkMerge [
+    {
+      services.tailscale = {
+        openFirewall = true;
+      };
+    }
+
+    (lib.mkIf cfg.enable {
+      networking.firewall = {
+        # Trust all connections over Tailscale
+        trustedInterfaces = [ config.services.tailscale.interfaceName ];
+      };
+    })
+
+    (lib.mkIf (cfg.enable && usingTailscaleSSH) {
+      networking.firewall = {
+        allowedTCPPorts = [ 22 ];
+      };
+    })
+  ];
+}
-- 
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