diff --git a/lib/dhcp.js b/lib/dhcp.js
index e009e81..68f4adb 100644
--- a/lib/dhcp.js
+++ b/lib/dhcp.js
@@ -287,7 +287,10 @@ Server.prototype = {
     } else if (_static[clientMAC]) {
       return _static[clientMAC];
     }
-
+    
+    const _ignoreRange = this.config('ignoreRange');
+    if(_ignoreRange)
+      return false;
 
     const randIP = this.config('randomIP');
     const _tmp = this.config('range');
@@ -363,7 +366,9 @@ Server.prototype = {
     lease.server = this.config('server');
     lease.state = 'OFFERED';
 
-    this.sendOffer(req);
+    if(lease.address) {
+      this.sendOffer(req);
+    }
   },
   sendOffer: function(req) {
 
@@ -408,7 +413,9 @@ Server.prototype = {
     lease.state = 'BOUND';
     lease.bindTime = new Date;
 
-    this.sendAck(req);
+    if(lease.address) {
+      this.sendAck(req);
+    }
   },
   sendAck: function(req) {
     //console.log('Send ACK');
diff --git a/lib/options.js b/lib/options.js
index b5f597a..5b0c168 100644
--- a/lib/options.js
+++ b/lib/options.js
@@ -537,6 +537,12 @@ const opts = {
     type: 'Bool',
     config: 'randomIP',
     default: true
+  },
+  9999: {
+    name: 'Ignore Range',
+    type: 'Bool',
+    config: 'ignoreRange',
+    default: false
   }
 };