From bf62f31b9e3b5fb4205b3389170be01fbcda284c Mon Sep 17 00:00:00 2001
From: andryyy <andre.peters@debinux.de>
Date: Thu, 27 Aug 2020 21:13:20 +0200
Subject: [PATCH] [Web] Fail2ban: Only write regex filters if not empty

---
 data/web/inc/functions.fail2ban.inc.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/data/web/inc/functions.fail2ban.inc.php b/data/web/inc/functions.fail2ban.inc.php
index 72d60062..b7918180 100644
--- a/data/web/inc/functions.fail2ban.inc.php
+++ b/data/web/inc/functions.fail2ban.inc.php
@@ -129,7 +129,9 @@ function fail2ban($_action, $_data = null) {
               $regex_array[$rule_id] = $regex;
               $rule_id++;
             }
-            $redis->Set('F2B_REGEX', json_encode($regex_array, JSON_UNESCAPED_SLASHES));
+            if (!empty($regex_array)) {
+              $redis->Set('F2B_REGEX', json_encode($regex_array, JSON_UNESCAPED_SLASHES));
+            }
           }
           else {
             $_SESSION['return'][] = array(