diff --git a/lib/server.js b/lib/server.js
index 84984d0..74d8bc4 100644
--- a/lib/server.js
+++ b/lib/server.js
@@ -491,38 +491,53 @@ function Server(options) {
   this.server.on('error', function (err) {
     self.emit('error', err);
   });
-
-  this.__defineGetter__('maxConnections', function () {
-    return self.server.maxConnections;
-  });
-  this.__defineSetter__('maxConnections', function (val) {
-    self.server.maxConnections = val;
-  });
-  this.__defineGetter__('connections', function () {
-    return self.server.connections;
-  });
-  this.__defineGetter__('name', function () {
-    return 'LDAPServer';
-  });
-  this.__defineGetter__('url', function () {
-    var str;
-    if (!this.server.address().family) {
-      str = 'ldapi://';
-      str += this.host.replace(new RegExp('/', 'g'), '%2f');
-      return str;
-    }
-    if (this.server instanceof tls.Server) {
-      str = 'ldaps://';
-    } else {
-      str = 'ldap://';
-    }
-    str += self.host || 'localhost';
-    str += ':';
-    str += self.port || 389;
-    return str;
-  });
 }
 util.inherits(Server, EventEmitter);
+Object.defineProperties(Server.prototype, {
+  maxConnections: {
+    get: function getMaxConnections() {
+      return this.server.maxConnections;
+    },
+    set: function setMaxConnections(val) {
+      this.server.maxConnections = val;
+    },
+    configurable: false
+  },
+  connections: {
+    get: function getConnections() {
+      return this.server.connections;
+    },
+    configurable: false
+  },
+  name: {
+    get: function getName() {
+      return 'LDAPServer';
+    },
+    configurable: false
+  },
+  url: {
+    get: function getURL() {
+      var str;
+      var addr = this.server.address();
+      if (!addr) {
+        return null;
+      }
+      if (!addr.family) {
+        str = 'ldapi://';
+        str += this.host.replace(new RegExp('/', 'g'), '%2f');
+        return str;
+      }
+      if (this.server instanceof tls.Server) {
+        str = 'ldaps://';
+      } else {
+        str = 'ldap://';
+      }
+      str += this.host + ':' + this.port;
+      return str;
+    },
+    configurable: false
+  }
+});
 module.exports = Server;
 
 
@@ -705,7 +720,7 @@ Server.prototype.listen = function (port, host, callback) {
   }
   var self = this;
 
-  function _callback() {
+  function cbListen() {
     if (typeof (port) === 'number') {
       self.host = self.address().address;
       self.port = self.address().port;
@@ -719,9 +734,9 @@ Server.prototype.listen = function (port, host, callback) {
   }
 
   if (typeof (port) === 'number') {
-    return this.server.listen(port, host, _callback);
+    return this.server.listen(port, host, cbListen);
   } else {
-    return this.server.listen(port, _callback);
+    return this.server.listen(port, cbListen);
   }
 };
 Server.prototype.listenFD = function (fd) {
diff --git a/test/server.test.js b/test/server.test.js
index c4e5c19..d9125d8 100644
--- a/test/server.test.js
+++ b/test/server.test.js
@@ -45,12 +45,30 @@ test('basic create', function (t) {
   t.end();
 });
 
+test('properties', function (t) {
+  t.equal(server.name, 'LDAPServer');
+
+  // TODO: better test
+  server.maxConnections = 10;
+  t.equal(server.maxConnections, 10);
+
+  t.equal(server.url, null, 'url empty before bind');
+  // listen on a random port so we have a url
+  server.listen(0, 'localhost', function () {
+    t.ok(server.url);
+
+    server.close();
+    t.end();
+  });
+});
+
 test('listen on unix/named socket', function (t) {
-  t.plan(1);
+  t.plan(2);
   server = ldap.createServer();
   sock = getSock();
   server.listen(sock, function () {
-    t.ok(true);
+    t.ok(server.url);
+    t.equal(server.url.split(':')[0], 'ldapi');
     server.close();
     t.end();
   });