From a4b3217bd1760611fc3616e293542a21375bd2ff Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?G=C3=A1bor=20Hojtsy?= <gabor@hojtsy.hu>
Date: Mon, 3 Sep 2007 09:59:43 +0000
Subject: #169263 by Gerhard Killesreiter: fix IP address identification

---
 includes/bootstrap.inc | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/includes/bootstrap.inc b/includes/bootstrap.inc
index 2d9034abb..bcf94f7ea 100644
--- a/includes/bootstrap.inc
+++ b/includes/bootstrap.inc
@@ -1111,8 +1111,9 @@ function ip_address() {
   if (!isset($ip_address)) {
     $ip_address = $_SERVER['REMOTE_ADDR'];
     if (variable_get('reverse_proxy', 0) && array_key_exists('HTTP_X_FORWARDED_FOR', $_SERVER)) {
-      // If there are several arguments, the leftmost one is the farthest client
-      list($ip_address, ) = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
+      // If there are several arguments, we need to check the most
+      // recently added one, ie the last one.
+      $ip_address = array_pop(explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']));
     }
   }
 
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