diff --git a/check_iface-dns.py b/check_iface-dns.py
index a879b7e..43f1c17 100755
--- a/check_iface-dns.py
+++ b/check_iface-dns.py
@@ -1,11 +1,11 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # -*- encoding: utf-8 -*-
 
 #####################################################################
 # (c) 2006-2011 by Sven Velt and team(ix) GmbH, Nuernberg, Germany  #
 #                  sv@teamix.net                                    #
-# (c) 2016 by Sven Velt, Germany                                    #
-#             sven-mymonplugins@velt.biz                            #
+# (c) 2016- by Sven Velt, Germany                                   #
+#              sven-mymonplugins@velt.biz                           #
 #                                                                   #
 # This file is part of "velt.biz - My Monitoring Plugins"           #
 # a fork of "team(ix) Monitoring Plugins" in 2015                   #
@@ -31,25 +31,24 @@ import struct
 import sys
 
 try:
-	from monitoringplugin import SNMPMonitoringPlugin
+	from MyMonPlugin import MonitoringPlugin
 except ImportError:
-	print '=========================='
-	print 'AIKS! Python import error!'
-	print '==========================\n'
-	print 'Could not find "monitoringplugin.py"!\n'
-	print 'Did you download "%s"' % os.path.basename(sys.argv[0])
-	print 'without "monitoringplugin.py"?\n'
-	print 'Please go back to'
-	print 'https://gogs.velt.biz/velt.biz/MyMonPlugins and download it,'
-	print 'or even better:'
-	print 'get a full archive at http://gogs.velt.biz/velt.biz/MyMonPlugins/releases'
-	print 'or a master snapshot at http://gogs.velt.biz/velt.biz/MyMonPlugins/archive/master.tar.gz\n'
+	print('==========================')
+	print('AIKS! Python import error!')
+	print('==========================\n')
+	print('Could not find class "MonitoringPlugin"!\n')
+	print('Did you download "%s"' % os.path.basename(sys.argv[0]))
+	print('without "MyMonPlugin/"?\n')
+	print('Please go back to')
+	print('https://gogs.velt.biz/velt.biz/MyMonPlugins and:')
+	print('- get a full archive at http://gogs.velt.biz/velt.biz/MyMonPlugins/releases')
+	print('- or a master snapshot at http://gogs.velt.biz/velt.biz/MyMonPlugins/archive/master.tar.gz\n')
 	sys.exit(127)
 
 
 def get_ipv4_address(iface):
 	sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
-	return socket.inet_ntoa(fcntl.ioctl(sock.fileno(), 0x8915, struct.pack('256s', iface[:15]))[20:24])
+	return socket.inet_ntoa(fcntl.ioctl(sock.fileno(), 0x8915, struct.pack('256s', bytes(iface[:15], 'utf-8')))[20:24])
 
 
 plugin = MonitoringPlugin(pluginname='check_iface-dns', tagforstatusline='IFACE-DNS', description='Check interface address vs. DNS', version='0.1')
@@ -74,7 +73,8 @@ plugin.parse_cmdlineoptions()
 # Get IP from interface
 try:
 	ip_iface = get_ipv4_address(plugin.options.iface)
-except IOError, (errno, strerror):
+except IOError as xxx_todo_changeme:
+	(errno, strerror) = xxx_todo_changeme.args
 	if errno == 19:
 		plugin.back2nagios(2, 'Interface "%s" does not exist!' % plugin.options.iface)
 	elif errno == 99:
@@ -120,7 +120,7 @@ else:
 		else:
 			plugin.add_multilineoutput('OK - "%s" resolves to "%s"' % (dns, ip_dns))
 
-		
+
 	if len(failed_dns) == 0:
 		plugin.add_returncode(0)
 		plugin.add_output('All DNS objects have a correct IP')