From e44e07784fce7c5794b2cb385557403c93b88386 Mon Sep 17 00:00:00 2001
From: Michael Kaufmann <d00p@froxlor.org>
Date: Sun, 19 Jan 2020 10:08:06 +0100
Subject: [PATCH] validate nameserver ip-addresses for binds allow-transfer
 block; fixes #791

Signed-off-by: Michael Kaufmann <d00p@froxlor.org>
---
 lib/Froxlor/Cron/Dns/Bind.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/Froxlor/Cron/Dns/Bind.php b/lib/Froxlor/Cron/Dns/Bind.php
index a556eef5..2c2ae9f9 100644
--- a/lib/Froxlor/Cron/Dns/Bind.php
+++ b/lib/Froxlor/Cron/Dns/Bind.php
@@ -112,7 +112,10 @@ class Bind extends DnsBase
 			if (count($this->ns) > 0) {
 				foreach ($this->ns as $ns) {
 					foreach ($ns["ips"] as $ip) {
-						$bindconf_file .= '		' . $ip . ";\n";
+						$ip = \Froxlor\Validate\Validate::validate_ip2($ip, true, 'invalidip', true, true, true);
+						if ($ip) {
+							$bindconf_file .= '		' . $ip . ";\n";
+						}
 					}
 				}
 			}