diff --git a/www.conf b/www.conf
new file mode 100644
index 0000000..076c057
--- /dev/null
+++ b/www.conf
@@ -0,0 +1,14 @@
+error_page 418 = @www;
+set $www "0";
+if ( $http_host ~* "^www\.") {
+    set $www "${www}1";
+}
+if ( $http_host ~* "^m\.") {
+    set $www "${www}2";
+}
+if ( $www = "0" ) {
+    return 418;
+}
+location @www {
+    rewrite ^ $scheme://www.$host$request_uri? permanent;
+}