From bc12ae8a7b1014555d0780f052e13bbd821f41e2 Mon Sep 17 00:00:00 2001
From: Chris Buechler <cmb@pfsense.org>
Date: Sun, 19 Oct 2014 18:38:13 -0500
Subject: Underscores are valid characters in domains. Fixes #3219

---
 etc/inc/util.inc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/etc/inc/util.inc b/etc/inc/util.inc
index 18f3905..a9e533f 100644
--- a/etc/inc/util.inc
+++ b/etc/inc/util.inc
@@ -644,7 +644,7 @@ function is_domain($domain) {
 	if (!is_string($domain))
 		return false;
 
-	if (preg_match('/^(?:(?:[a-z0-9]|[a-z0-9][a-z0-9\-]*[a-z0-9])\.)*(?:[a-z0-9]|[a-z0-9][a-z0-9\-]*[a-z0-9])$/i', $domain))
+	if (preg_match('/^(?:(?:[a-z_0-9]|[a-z_0-9][a-z_0-9\-]*[a-z_0-9])\.)*(?:[a-z_0-9]|[a-z_0-9][a-z_0-9\-]*[a-z_0-9])$/i', $domain))
 		return true;
 	else
 		return false;
-- 
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