From 48363b655ae8ba83232b16dcffd7672be70ea3c8 Mon Sep 17 00:00:00 2001
From: Mark Samman <mark.samman@gmail.com>
Date: Wed, 29 Oct 2014 19:36:39 +0100
Subject: [PATCH] Increase security of ipn.php

---
 ipn.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/ipn.php b/ipn.php
index 208b521..b53f473 100644
--- a/ipn.php
+++ b/ipn.php
@@ -1,4 +1,7 @@
 <?php
+	if (gethostbyaddr($_SERVER['REMOTE_ADDR']) !== 'notify.paypal.com') {
+		exit();
+	}
 
 	// Require the functions to connect to database and fetch config values
 	require 'config.php';