From bf571f26d4d265cd74a38a9c0efda341bd610e12 Mon Sep 17 00:00:00 2001
From: Till Brehm <tbrehm@ispconfig.org>
Date: Fri, 7 Sep 2018 16:57:01 +0200
Subject: [PATCH] Allow single letter domain tld

---
 interface/lib/classes/validate_domain.inc.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/interface/lib/classes/validate_domain.inc.php b/interface/lib/classes/validate_domain.inc.php
index 01293abd6..904fab2b2 100644
--- a/interface/lib/classes/validate_domain.inc.php
+++ b/interface/lib/classes/validate_domain.inc.php
@@ -191,7 +191,7 @@ class validate_domain {
 
 	/* internal validator function to match regexp */
 	function _regex_validate($domain_name, $allow_wildcard = false) {
-		$pattern = '/^' . ($allow_wildcard == true ? '(\*\.)?' : '') . '[\w\.\-]{2,255}\.[a-zA-Z0-9\-]{2,30}$/';
+		$pattern = '/^' . ($allow_wildcard == true ? '(\*\.)?' : '') . '[\w\.\-]{2,255}\.[a-zA-Z0-9\-]{1,30}$/';
 		return preg_match($pattern, $domain_name);
 	}
 
-- 
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