From f8622c6f922b5da904e9c3cf7d62b085420dca9c Mon Sep 17 00:00:00 2001
From: sebres <serg.brester@sebres.de>
Date: Wed, 23 Aug 2023 16:26:00 +0200
Subject: [PATCH] fixes IPAddr.searchIP for IPv6 (IPv4 group scanning plain
 IPv6 is None)

---
 fail2ban/server/ipdns.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fail2ban/server/ipdns.py b/fail2ban/server/ipdns.py
index 22080ff7..7ca1e432 100644
--- a/fail2ban/server/ipdns.py
+++ b/fail2ban/server/ipdns.py
@@ -664,7 +664,7 @@ class IPAddr(object):
 		if not match:
 			return None
 		ipstr = match.group('IPv4')
-		if ipstr != '':
+		if ipstr is not None and ipstr != '':
 			return ipstr
 		return match.group('IPv6')