index.js

@@ -517,7 +517,7 @@ Greenlock.create = function (gl) {
         req.headers.host = host.join(':');
       }
 
-      if (!gl.__sni_allow_domain_fronting) {
+      if (gl.__sni_allow_fronting) {
         if (req.socket && 'string' === typeof req.socket.servername) {
           if (safehost && (safehost !== req.socket.servername.toLowerCase())) {
             res.statusCode = 400;

package.json

@@ -1,6 +1,6 @@
 {
   "name": "greenlock",
-  "version": "2.4.2",
+  "version": "2.4.1",
   "description": "Let's Encrypt for node.js on npm",
   "main": "index.js",
   "files": [