diff --git a/modules/docker/default.nix b/modules/docker/default.nix
index e7644b8..4f258d1 100644
--- a/modules/docker/default.nix
+++ b/modules/docker/default.nix
@@ -10,6 +10,4 @@
     docker-compose
     lazydocker
   ];
-
-
 }
diff --git a/modules/mariadb/default.nix b/modules/mariadb/default.nix
index 553643a..03961f9 100644
--- a/modules/mariadb/default.nix
+++ b/modules/mariadb/default.nix
@@ -9,5 +9,5 @@
       };
     };
   };
-  networking.firewall.interfaces."docker0".allowedTCPPorts = [ 3306 ];
+  networking.firewall.extraCommands = "iptables -A INPUT -p tcp --destination-port 3306 -s 172.16.0.0/12 -j ACCEPT";
 }