From 6718b04e13563ced9be8a616d85187ac0d384583 Mon Sep 17 00:00:00 2001
From: Fatih Altinok <fatihaltinok@live.com>
Date: Thu, 23 Jul 2026 23:00:57 +0300
Subject: [PATCH] nixos/crab-hole: Add `openFirewall` option to
 `services.crab-hole`

Add `openFirewall` option similar to pi-hole for easier usage. Fixes #542947
---
 nixos/modules/services/networking/crab-hole.nix | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/nixos/modules/services/networking/crab-hole.nix b/nixos/modules/services/networking/crab-hole.nix
index 31af31e7a225..47cb35066d30 100644
--- a/nixos/modules/services/networking/crab-hole.nix
+++ b/nixos/modules/services/networking/crab-hole.nix
@@ -35,6 +35,12 @@ in
 
       package = lib.mkPackageOption pkgs "crab-hole" { };
 
+      openFirewall = lib.mkOption {
+        type = lib.types.bool;
+        default = false;
+        description = "Open ports in the firewall for crab-hole's DNS server.";
+      };
+
       supplementaryGroups = lib.mkOption {
         type = lib.types.listOf lib.types.str;
         default = [ ];
@@ -170,6 +176,11 @@ in
         RestartSec = 1;
       };
     };
+
+    networking.firewall = lib.mkIf cfg.openFirewall {
+      allowedUDPPorts = [ 53 ];
+      allowedTCPPorts = [ 53 ];
+    };
   };
 
   meta.maintainers = [