Cleanup

node_modules/mongoose/lib/error/serverSelection.js

@@ -7,6 +7,7 @@
 const MongooseError = require('./mongooseError');
 const allServersUnknown = require('../helpers/topology/allServersUnknown');
 const isAtlas = require('../helpers/topology/isAtlas');
+const isSSLError = require('../helpers/topology/isSSLError');
 
 /*!
  * ignore
@@ -17,6 +18,11 @@ const atlasMessage = 'Could not connect to any servers in your MongoDB Atlas clu
   'an IP that isn\'t whitelisted. Make sure your current IP address is on your Atlas ' +
   'cluster\'s IP whitelist: https://docs.atlas.mongodb.com/security-whitelist/';
 
+const sslMessage = 'Mongoose is connecting with SSL enabled, but the server is ' +
+  'not accepting SSL connections. Please ensure that the MongoDB server you are ' +
+  'connecting to is configured to accept SSL connections. Learn more: ' +
+  'https://mongoosejs.com/docs/tutorials/ssl.html';
+
 class MongooseServerSelectionError extends MongooseError {
   /**
    * MongooseServerSelectionError constructor
@@ -28,10 +34,16 @@ class MongooseServerSelectionError extends MongooseError {
     // Special message for a case that is likely due to IP whitelisting issues.
     const isAtlasWhitelistError = isAtlas(reason) &&
       allServersUnknown(reason) &&
-      err.message.indexOf('bad auth') === -1;
-    this.message = isAtlasWhitelistError ?
-      atlasMessage :
-      err.message;
+      err.message.indexOf('bad auth') === -1 &&
+      err.message.indexOf('Authentication failed') === -1;
+
+    if (isAtlasWhitelistError) {
+      this.message = atlasMessage;
+    } else if (isSSLError(reason)) {
+      this.message = sslMessage;
+    } else {
+      this.message = err.message;
+    }
     for (const key in err) {
       if (key !== 'name') {
         this[key] = err[key];