diff --git a/fail2ban/server/ipdns.py b/fail2ban/server/ipdns.py
index 6ef36888..7110d974 100644
--- a/fail2ban/server/ipdns.py
+++ b/fail2ban/server/ipdns.py
@@ -69,10 +69,14 @@ class DNSUtils:
 		for fam, ipfam in ((socket.AF_INET, IPAddr.FAM_IPv4), (socket.AF_INET6, IPAddr.FAM_IPv6)):
 			try:
 				for result in socket.getaddrinfo(dns, None, fam, 0, socket.IPPROTO_TCP):
-					ip = IPAddr(result[4][0], ipfam)
+					# if getaddrinfo returns something unexpected:
+					if len(result) < 4 or not len(result[4]): continue
+					# get ip from `(2, 1, 6, '', ('127.0.0.1', 0))`,be sure we've an ip-string
+					# (some python-versions resp. host configurations causes returning of integer there):
+					ip = IPAddr(str(result[4][0]), ipfam)
 					if ip.isValid:
 						ips.append(ip)
-			except socket.error as e:
+			except Exception as e:
 				saveerr = e
 		if not ips and saveerr:
 			logSys.warning("Unable to find a corresponding IP address for %s: %s", dns, saveerr)
diff --git a/fail2ban/tests/filtertestcase.py b/fail2ban/tests/filtertestcase.py
index cb0edb06..fe90f2ee 100644
--- a/fail2ban/tests/filtertestcase.py
+++ b/fail2ban/tests/filtertestcase.py
@@ -1852,6 +1852,10 @@ class DNSUtilsNetworkTests(unittest.TestCase):
 		self.assertTrue(IPAddr("93.184.216.34").isInNet(ips))
 		self.assertTrue(IPAddr("2606:2800:220:1:248:1893:25c8:1946").isInNet(ips))
 
+	def testIPAddr_wrongDNS_IP(self):
+		DNSUtils.dnsToIp('`this`.dns-is-wrong.`wrong-nic`-dummy')
+		DNSUtils.ipToName('*')
+
 	def testIPAddr_Cached(self):
 		ips = [DNSUtils.dnsToIp('example.com'), DNSUtils.dnsToIp('example.com')]
 		for ip1, ip2 in zip(ips, ips):