diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9ad453e..5473a43 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,11 @@
+## 1.2.0 (2017-XX-XX)
+- added command server to check status of Load Balancing Servers
+- added command hwinfo to just print information about the Netscaler itself
+- added command interfaces to check state of all interfaces and add performance data for each interface
+- added command to request performance data
+- added command to check the state of a servicegroup and its members (set warning and critical values for member quorum)
+- added Icinga2 config templates
+
 ## 1.1.1 (2017-06-10)
 - bugfix for servicegroups in 12.0 (#12)
 - new option to connect to an alternate port (for CPX instances)
diff --git a/README.md b/README.md
index 27e2e5b..88668f1 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,11 @@ Currently the plugin has the following subcommands:
 - **sslcert:** check the lifetime for installed ssl certificates
 - **nsconfig:** check for configuration changes which are not saved to disk
 - **staserver:** check if configured STA servers are available
+- **server:** check status of Load Balancing Servers
+- **servicegroup:** check the state of a servicegroup and its members
+- **hwinfo:** just print information about the Netscaler itself
+- **interfaces:** check state of all interfaces and add performance data for each interface
+- **performancedata:** gather performancedata from all sorts of API endpoints
 - **debug:** debug command, print all data for a endpoint
 
 This plugin works with VPX, MPX, SDX and CPX NetScaler Appliances. The api responses may differ by build, appliance type and your installed license.
@@ -108,6 +113,51 @@ If you want to connect to your NetScaler with SSL/HTTPS you should also install
     # NetScaler::STA::vs_vpn_gateway
     ./check_netscaler.pl -H ${IPADDR} -s -C staserver -n vs_vpn_gateway
 
+## Check if Load Balancer server are working
+
+    # NetScaler::Server
+    ./check_netscaler.pl -H ${IPADDR} -s -C server
+
+## Check status of a service group
+##### define member quorum (in percent) with warning and critical values
+    # NetScaler::Servicegroup::vs_vpn_gateway
+    ./check_netscaler.pl -H ${IPADDR} -s -C servicegroup -n vs_vpn_gateway -w 75 -c 50
+
+## Get information about the netscaler
+
+    # NetScaler::HWInfo
+    ./check_netscaler.pl -H ${IPADDR} -s -C hwinfo
+
+## Check status of all network interfaces
+
+    # NetScaler::Interfaces
+    ./check_netscaler.pl -H ${IPADDR} -s -C interfaces
+
+## Request performance data
+##### all fields must be defined via "-n" option and be seperated with a comma
+
+    # NetScaler::Performancedata on Cache hit/misses
+    ./check_netscaler.pl -H ${IPADDR} -s -C performancedata -o ns -n cachetothits,cachetotmisses
+
+    # NetScaler::Performancedata on tcp connections
+    ./check_netscaler.pl -H ${IPADDR} -s -C performancedata -o ns -n tcpcurclientconn,tcpcurclientconnestablished,tcpcurserverconn,tcpcurserverconnestablished
+
+    # NetScaler::Performancedata on network interfaces
+    ./check_netscaler.pl -H ${IPADDR} -s -C performancedata -o Interface -n id.totrxbytes
+
+    # NetScaler::Current user sessions
+    ./check_netscaler.pl -H ${IPADDR} -s -C performancedata -o aaa -n aaacuricasessions,aaacuricaonlyconn
+
+    # find more object names to check out for object type "ns"
+    /check_netscaler.pl -H ${IPADDR} -s -C debug -o ns
+
+    # more interesting performance data object types
+    * ns
+    * cache
+    * protocolhttp
+    * protocolip
+    * protocoltcp
+
 ## Debug command
     # Print all LB vServers (stat endpoint)
     ./check_netscaler.pl -H ${IPADDR} -s -C debug -o lbvserver
@@ -133,6 +183,14 @@ username=nagios
 password=password
 ```
 
+# Authors
+- @slauger
+
+# Contributors
+- @macampo
+- @Velociraptor85
+- @bb-ricardo
+
 # NITRO API Documentation
 
 You will find a full documentation about the NITRO API on your NetScaler Appliance in the "Download" area.
diff --git a/check_netscaler.pl b/check_netscaler.pl
index 3a31e7b..ce429f9 100755
--- a/check_netscaler.pl
+++ b/check_netscaler.pl
@@ -1,11 +1,13 @@
 #!/usr/bin/perl
 ##############################################################################
 # check_netscaler.pl
-# Nagios Plugin for Citrix NetScaler 
+# Nagios Plugin for Citrix NetScaler
 # Simon Lauger <simon@lauger.name>
 #
 # https://github.com/slauger/check_netscaler
 #
+# Version: 1.2.0 (2017-XX-XX)
+#
 # Copyright 2015-2017 Simon Lauger
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -33,7 +35,7 @@
 my $plugin = Nagios::Plugin->new(
 	plugin		=> 'check_netscaler',
 	shortname	=> 'NetScaler',
-	version		=> '1.1.1',
+	version		=> '1.2.X',
 	url			=> 'https://github.com/slauger/check_netscaler',
 	blurb		=> 'Nagios Plugin for Citrix NetScaler Appliance (VPX/MPX/SDX/CPX)',
 	usage		=> 'Usage: %s -H <hostname> [ -u <username> ] [ -p <password> ]
@@ -120,6 +122,12 @@
 		desc => 'Value for critical',
 		required => 0,
 	},
+	{
+		spec => 'urlopts|x=s',
+		usage => '-x, --urlopts=STRING',
+		desc => 'DEBUG ONLY: add additional url options',
+		required => 0,
+	},
 );
 
 foreach my $arg (@args) {
@@ -133,16 +141,16 @@
 	check_state($plugin);
 } elsif ($plugin->opts->command eq 'above') {
 	# check if a response is above a threshold
-	check_threshold_above($plugin);
+	check_threshold($plugin, $plugin->opts->command);
 } elsif ($plugin->opts->command eq 'below') {
 	# check if a response is below  a threshold
-	check_threshold_below($plugin);
+	check_threshold($plugin, $plugin->opts->command);
 } elsif ($plugin->opts->command eq 'string') {
 	# check if a response does contains a specific string
-	check_string($plugin);
+	check_string($plugin, "matches");
 } elsif ($plugin->opts->command eq 'string_not') {
 	# check if a response does not contains a specific string
-	check_string_not($plugin);
+	check_string($plugin, "matches not");
 } elsif ($plugin->opts->command eq 'sslcert') {
 	# check for the lifetime of installed certificates
 	check_sslcert($plugin);
@@ -152,8 +160,23 @@
 } elsif ($plugin->opts->command eq 'staserver') {
 	# check the state of the staservers
 	check_staserver($plugin);
+} elsif ($plugin->opts->command eq 'server') {
+	# check the state of the servers
+	check_server($plugin);
+} elsif ($plugin->opts->command eq 'hwinfo') {
+	# print infos about hardware and build version
+	get_hardware_info($plugin);
+} elsif ($plugin->opts->command eq 'performancedata') {
+	# print performance data of protocol stats
+	get_performancedata($plugin);
+} elsif ($plugin->opts->command eq 'interfaces') {
+	# check the state of all interfaces
+	check_interfaces($plugin);
+} elsif ($plugin->opts->command eq 'servicegroup') {
+	# check the state of a servicegroup and its members
+	check_servicegroup($plugin);
 } elsif ($plugin->opts->command eq 'debug') {
-	# dump the full response of the nitro api 
+	# dump the full response of the nitro api
 	check_debug($plugin);
 } else {
 	# error, unkown command given
@@ -197,19 +220,19 @@ sub nitro_client {
 
 	my $plugin  = shift;
 	my $params  = shift;
-		
+
 	my $lwp = LWP::UserAgent->new(
-		env_proxy => 1, 
-		keep_alive => 1, 
-		timeout => $plugin->opts->timeout, 
-		ssl_opts => { 
-			verify_hostname => 0, 
+		env_proxy => 1,
+		keep_alive => 1,
+		timeout => $plugin->opts->timeout,
+		ssl_opts => {
+			verify_hostname => 0,
 			SSL_verify_mode => 0
 		},
 	);
-	
+
 	my $protocol = undef;
-	
+
 	if ($plugin->opts->ssl) {
 		$protocol = 'https://';
 	} else {
@@ -229,58 +252,58 @@ sub nitro_client {
 	if ($params->{'objectname'} && $params->{'objectname'} ne '') {
 		$url  = $url . '/' . uri_escape(uri_escape($params->{'objectname'}));
 	}
-	
+
 	if ($params->{'options'} && $params->{'options'} ne '') {
 		$url = $url . '?' . $params->{'options'};
 	}
-	
+
 	if ($plugin->opts->verbose) {
 		print "debug: target url is " . $url . "\n";
 	}
-	
+
 	my $request = HTTP::Request->new(GET => $url);
-		
+
 	$request->header('X-NITRO-USER', $plugin->opts->username);
 	$request->header('X-NITRO-PASS', $plugin->opts->password);
 	$request->header('Content-Type', 'application/vnd.com.citrix.netscaler.' . $params->{'objecttype'} . '+json');
-	
+
 	my $response = $lwp->request($request);
-	
+
 	if ($plugin->opts->verbose) {
 		print "debug: response of request is:\n";
 		print Dumper($response->content);
 	}
-	
+
 	if (HTTP::Status::is_error($response->code)) {
 		$plugin->nagios_die($response->content);
 	} else {
 		$response = JSON->new->allow_blessed->convert_blessed->decode($response->content);
 	}
-	
+
 	return $response;
 }
 
 sub check_state
 {
 	my $plugin = shift;
-	
+
 	if (!defined $plugin->opts->objecttype) {
 		$plugin->nagios_die('command requires objecttype parameter');
 	}
-	
+
 	my %counter;
-	
+
 	$counter{'up'}     = 0;
 	$counter{'down'}   = 0;
 	$counter{'oos'}    = 0;
 	$counter{'unkown'} = 0;
 
 	my %params;
-	
+
 	my $field_name;
 	my $field_state;
-	
-	# well, i guess the citrix api developers were drunk 
+
+	# well, i guess the citrix api developers were drunk
 	if ($plugin->opts->objecttype eq 'service') {
 		$params{'endpoint'} = $plugin->opts->endpoint || 'config';
 		$field_name  = 'name';
@@ -294,14 +317,14 @@ sub check_state
 		$field_name  = 'name';
 		$field_state = 'state';
 	}
-	
+
 	$params{'objecttype'} = $plugin->opts->objecttype;
 	$params{'objectname'} = $plugin->opts->objectname;
 	$params{'options'}    = undef;
 
 	my $response = nitro_client($plugin, \%params);
 	$response = $response->{$plugin->opts->objecttype};
-	
+
 	foreach my $response (@{$response}) {
 		if ($response->{$field_state} eq 'UP') {
 			$counter{'up'}++;
@@ -321,11 +344,11 @@ sub check_state
 			$counter{'unkown'}++;
 			$plugin->add_message(CRITICAL, $response->{$field_name} . ' unknown;');
 		}
-	}		
+	}
 	my ($code, $message) = $plugin->check_messages;
-	
+
 	my $stats = ' (' . $counter{'up'} . ' up, ' . $counter{'down'} . ' down, ' . $counter{'oos'} . ' oos, ' . $counter{'unkown'} . ' unkown)';
-	
+
 	$plugin->add_perfdata(
 		label => 'up',
 		value => $counter{'up'},
@@ -364,11 +387,12 @@ sub check_state
 sub check_string
 {
 	my $plugin = shift;
-	
+	my $type_of_string_comparison = shift;
+
 	if (!defined $plugin->opts->objecttype) {
 		$plugin->nagios_die('command requires parameter for objecttype');
 	}
-	
+
 	if (!defined $plugin->opts->objectname) {
 		$plugin->nagios_die('command requires parameter for objectname');
 	}
@@ -377,38 +401,8 @@ sub check_string
 		$plugin->nagios_die('command requires parameter for warning and critical');
 	}
 
-	my %params;
-	$params{'endpoint'}   = $plugin->opts->endpoint || 'stat';
-	$params{'objecttype'} = $plugin->opts->objecttype;
-	$params{'objectname'} = undef;
-	$params{'options'}    = undef;
-	
-	my $response = nitro_client($plugin, \%params);
-	$response = $response->{$plugin->opts->objecttype};
-
-	if ($response->{$plugin->opts->objectname} eq $plugin->opts->critical) {
-		$plugin->nagios_exit(CRITICAL, $plugin->opts->objecttype . '::' . $plugin->opts->objectname . ' matches keyword (current: ' . $response->{$plugin->opts->objectname} . ', critical: ' . $plugin->opts->critical . ')');
-	} elsif ($response->{$plugin->opts->objectname} eq $plugin->opts->warning) {
-		$plugin->nagios_exit(WARNING, $plugin->opts->objecttype . '::' . $plugin->opts->objectname . ' matches keyword (current: ' . $response->{$plugin->opts->objectname} . ', warning: ' . $plugin->opts->warning . ')');
-	} else {
-		$plugin->nagios_exit(OK, $plugin->opts->objecttype . '::' . $plugin->opts->objectname . ' OK ('.$response->{$plugin->opts->objectname}.')');
-	}
-}
-
-sub check_string_not
-{
-	my $plugin = shift;
-	
-	if (!defined $plugin->opts->objecttype) {
-		$plugin->nagios_die('command requires parameter for objecttype');
-	}
-	
-	if (!defined $plugin->opts->objectname) {
-		$plugin->nagios_die('command requires parameter for objectname');
-	}
-
-	if (!defined $plugin->opts->warning || !defined $plugin->opts->critical) {
-		$plugin->nagios_die('command requires parameter for warning and critical');
+	if ($type_of_string_comparison ne "matches" && $type_of_string_comparison ne "matches not") {
+		$plugin->nagios_die('string can only be checked for "matches" and "matches not"');
 	}
 
 	my %params;
@@ -416,27 +410,28 @@ sub check_string_not
 	$params{'objecttype'} = $plugin->opts->objecttype;
 	$params{'objectname'} = undef;
 	$params{'options'}    = undef;
-	
+
 	my $response = nitro_client($plugin, \%params);
 	$response = $response->{$plugin->opts->objecttype};
-		
-	if ($response->{$plugin->opts->objectname} ne $plugin->opts->critical) {
-		$plugin->nagios_exit(CRITICAL, $plugin->opts->objecttype . '::' . $plugin->opts->objectname . ' not matches keyword (current: ' . $response->{$plugin->opts->objectname} . ', critical: ' . $plugin->opts->critical . ')');
-	} elsif ($response->{$plugin->opts->objectname} ne $plugin->opts->warning) { 
-		$plugin->nagios_exit(WARNING, $plugin->opts->objecttype . '::' . $plugin->opts->objectname . ' not matches keyword (current: ' . $response->{$plugin->opts->objectname} . ', warning: ' . $plugin->opts->warning . ')');
+
+	if (($type_of_string_comparison eq "matches" && $response->{$plugin->opts->objectname} eq $plugin->opts->critical) || ($type_of_string_comparison eq "matches not" && $response->{$plugin->opts->objectname} ne $plugin->opts->critical)) {
+		$plugin->nagios_exit(CRITICAL, $plugin->opts->objecttype . '::' . $plugin->opts->objectname . ' ' . $type_of_string_comparison . ' keyword (current: ' . $response->{$plugin->opts->objectname} . ', critical: ' . $plugin->opts->critical . ')');
+	} elsif (($type_of_string_comparison eq "matches" && $response->{$plugin->opts->objectname} eq $plugin->opts->warning) || ($type_of_string_comparison eq "matches not" && $response->{$plugin->opts->objectname} ne $plugin->opts->warning)) {
+		$plugin->nagios_exit(WARNING, $plugin->opts->objecttype . '::' . $plugin->opts->objectname . ' ' . $type_of_string_comparison . ' keyword (current: ' . $response->{$plugin->opts->objectname} . ', warning: ' . $plugin->opts->warning . ')');
 	} else {
 		$plugin->nagios_exit(OK, $plugin->opts->objecttype . '::' . $plugin->opts->objectname . ' OK ('.$response->{$plugin->opts->objectname}.')');
 	}
 }
 
-sub check_threshold_above
+sub check_threshold
 {
 	my $plugin = shift;
+	my $direction = shift;
 
 	if (!defined $plugin->opts->objecttype) {
 		$plugin->nagios_die('command requires parameter for objecttype');
 	}
-			
+
 	if (!defined $plugin->opts->objectname) {
 		$plugin->nagios_die('command requires parameter for objectname');
 	}
@@ -445,12 +440,16 @@ sub check_threshold_above
 		$plugin->nagios_die('command requires parameter for warning and critical');
 	}
 
+	if ($direction ne "above" && $direction ne "below") {
+		$plugin->nagios_die('threshold can only be checked for "above" and "below"');
+	}
+
 	my %params;
 	$params{'endpoint'}   = $plugin->opts->endpoint || 'stat';
 	$params{'objecttype'} = $plugin->opts->objecttype;
 	$params{'objectname'} = undef;
 	$params{'options'}    = undef;
-	
+
 	my $response = nitro_client($plugin, \%params);
 	$response = $response->{$plugin->opts->objecttype};
 
@@ -458,72 +457,29 @@ sub check_threshold_above
 	$plugin->add_perfdata(
 		label    => $plugin->opts->objecttype . '::' . $plugin->opts->objectname,
 		value    => $response->{$plugin->opts->objectname},
-		min      => 0,
+		min      => undef,
 		max      => undef,
 		warning  => $plugin->opts->warning,
 		critical => $plugin->opts->critical,
 	);
 
-	if ($response->{$plugin->opts->objectname} >= $plugin->opts->critical) {
-		$plugin->nagios_exit(CRITICAL, $plugin->opts->objecttype . '::' . $plugin->opts->objectname . ' is above threshold (current: ' . $response->{$plugin->opts->objectname} . ', critical: ' . $plugin->opts->critical . ')');
-	} elsif ($response->{$plugin->opts->objectname} >= $plugin->opts->warning) {
-		$plugin->nagios_exit(WARNING, $plugin->opts->objecttype . '::' . $plugin->opts->objectname . ' is above threshold (current: ' . $response->{$plugin->opts->objectname} . ', warning: ' . $plugin->opts->warning . ')');
+	if (($direction eq "above" && $response->{$plugin->opts->objectname} >= $plugin->opts->critical) || ($direction eq "below" && $response->{$plugin->opts->objectname} <= $plugin->opts->critical)) {
+		$plugin->nagios_exit(CRITICAL, $plugin->opts->objecttype . '::' . $plugin->opts->objectname . ' is ' . $direction . ' threshold (current: ' . $response->{$plugin->opts->objectname} . ', critical: ' . $plugin->opts->critical . ')');
+	} elsif (($direction eq "above" && $response->{$plugin->opts->objectname} >= $plugin->opts->warning) || ($direction eq "below" && $response->{$plugin->opts->objectname} <= $plugin->opts->warning)) {
+		$plugin->nagios_exit(WARNING, $plugin->opts->objecttype . '::' . $plugin->opts->objectname . ' is ' . $direction . ' threshold (current: ' . $response->{$plugin->opts->objectname} . ', warning: ' . $plugin->opts->warning . ')');
 	} else {
 		$plugin->nagios_exit(OK, $plugin->opts->objecttype . '::' . $plugin->opts->objectname . ' OK ('.$response->{$plugin->opts->objectname}.')');
 	}
 }
 
-sub check_threshold_below
+sub check_sslcert
 {
 	my $plugin = shift;
-	
-	if (!defined $plugin->opts->objecttype) {
-		$plugin->nagios_die('command requires parameter for objecttype');
-	}
-	
-	if (!defined $plugin->opts->objectname) {
-		$plugin->nagios_die('command requires parameter for objectname');
-	}
 
 	if (!defined $plugin->opts->warning || !defined $plugin->opts->critical) {
 		$plugin->nagios_die('command requires parameter for warning and critical');
 	}
 
-	my %params;
-	$params{'endpoint'}   = $plugin->opts->endpoint || 'stat';
-	$params{'objecttype'} = $plugin->opts->objecttype;
-	$params{'objectname'} = undef;
-	$params{'options'}    = undef;
-	
-	my $response = nitro_client($plugin, \%params);
-	$response = $response->{$plugin->opts->objecttype};
-
-	$plugin->add_perfdata(
-		label    => $plugin->opts->objecttype . '::' . $plugin->opts->objectname,
-		value    => $response->{$plugin->opts->objectname},
-		min      => 0,
-		max      => undef,
-		warning  => $plugin->opts->warning,
-		critical => $plugin->opts->critical,
-	);
-
-	if ($response->{$plugin->opts->objectname} <= $plugin->opts->critical) {
-		$plugin->nagios_exit(CRITICAL, $plugin->opts->objecttype . '::' . $plugin->opts->objectname . ' is below threshold (current: ' . $response->{$plugin->opts->objectname} . ', critical: ' . $plugin->opts->critical . ')');
-	} elsif ($response->{$plugin->opts->objectname} <= $plugin->opts->warning) {
-		$plugin->nagios_exit(WARNING, $plugin->opts->objecttype . '::' . $plugin->opts->objectname . ' is below threshold (current: ' . $response->{$plugin->opts->objectname} . ', warning: ' . $plugin->opts->warning . ')');
-	} else {
-		$plugin->nagios_exit(OK, $plugin->opts->objecttype . '::' . $plugin->opts->objectname . ' ('.$response->{$plugin->opts->objectname}.')');
-	}
-}
-
-sub check_sslcert
-{
-	my $plugin = shift;
-	
-	if (!defined $plugin->opts->warning || !defined $plugin->opts->critical) {
-		$plugin->nagios_die('command requires parameter for warning and critical');
-	}
-	
 	my %params;
 	$params{'endpoint'}   = $plugin->opts->endpoint || 'config';
 	$params{'objecttype'} = $plugin->opts->objecttype || 'sslcertkey';
@@ -535,14 +491,14 @@ sub check_sslcert
 
 	foreach $response (@{$response}) {
 		if ($response->{daystoexpiration} <= $plugin->opts->critical) {
-				$plugin->add_message(CRITICAL, $response->{certkey} . ' expires in ' . $response->{daystoexpiration} . ' days;');
+			$plugin->add_message(CRITICAL, $response->{certkey} . ' expires in ' . $response->{daystoexpiration} . ' days;');
 		} elsif ($response->{daystoexpiration} <= $plugin->opts->warning) {
 			$plugin->add_message(WARNING, $response->{certkey} . ' expires in ' . $response->{daystoexpiration} . ' days;');
 		}
 	}
-	
+
 	my ($code, $message) = $plugin->check_messages;
-	
+
 	if ($code == OK) {
 		$plugin->nagios_exit($code, 'sslcertkey OK');
 	} else {
@@ -553,7 +509,7 @@ sub check_sslcert
 sub check_staserver
 {
 	my $plugin = shift;
-	
+
 	my %params;
 	$params{'endpoint'}   = $plugin->opts->endpoint || 'config';
 	$params{'objectname'} = $plugin->opts->objectname || '';
@@ -564,13 +520,13 @@ sub check_staserver
 	} else {
 		$params{'objecttype'} = $plugin->opts->objecttype || 'vpnvserver_staserver_binding';
 	}
-		
+
 	my $response = nitro_client($plugin, \%params);
 	$response = $response->{$params{'objecttype'}};
-	
+
 	# return critical if all staservers are down at once
 	my $critical = 1;
-	
+
 	# check if any stas are in down state
 	foreach $response (@{$response}) {
 		if ($response->{'staauthid'} eq '') {
@@ -580,20 +536,51 @@ sub check_staserver
 			$critical = 0;
 		}
 	}
-	
+
 	my ($code, $message) = $plugin->check_messages;
-	
-	if ($critical) {
-		$plugin->nagios_exit(CRITICAL, 'staservice ' . $message);
-	} else {
-		$plugin->nagios_exit($code, 'staservice ' . $message);
+
+	if ( $critical == 1) { $code = CRITICAL ; }
+
+	$plugin->nagios_exit($code, 'server ' . $message);
+}
+
+sub check_server
+{
+	my $plugin = shift;
+
+	my %params;
+	$params{'endpoint'}   = $plugin->opts->endpoint || 'config';
+	$params{'objectname'} = $plugin->opts->objectname || '';
+	$params{'options'}    = undef;
+	$params{'objecttype'} = "server";
+
+	my $response = nitro_client($plugin, \%params);
+	$response = $response->{$params{'objecttype'}};
+
+	# return critical if all staservers are down at once
+	my $critical = 1;
+
+	# check if any stas are in down state
+	foreach $response (@{$response}) {
+		if ($response->{'state'} ne 'ENABLED') {
+			$plugin->add_message(WARNING, $response->{'name'} . '('. $response->{'ipaddress'} .') ' . $response->{'state'} . ' ;');
+		} else {
+			$plugin->add_message(OK, $response->{'name'} . '('. $response->{'ipaddress'} .') ' . $response->{'state'} . ' ;');
+			$critical = 0;
+		}
 	}
+
+	my ($code, $message) = $plugin->check_messages;
+
+	if ( $critical == 1) { $code = CRITICAL ; }
+
+	$plugin->nagios_exit($code, 'server ' . $message);
 }
 
 sub check_nsconfig
 {
 	my $plugin = shift;
-	
+
 	my %params;
 	$params{'endpoint'}   = $plugin->opts->endpoint || 'config';
 	$params{'objecttype'} = $plugin->opts->objecttype || 'nsconfig';
@@ -602,7 +589,7 @@ sub check_nsconfig
 
 	my $response = nitro_client($plugin, \%params);
 	$response = $response->{$params{'objecttype'}};
-		
+
 	if (!defined $response->{'configchanged'} || $response->{'configchanged'}) {
 		$plugin->nagios_exit(WARNING, 'nsconfig::configchanged unsaved configuration changes');
 	} else {
@@ -610,17 +597,282 @@ sub check_nsconfig
 	}
 }
 
-sub check_debug
+sub get_hardware_info
+{
+	my $plugin = shift;
+
+	my %params;
+	$params{'endpoint'}   = 'config';
+	$params{'objecttype'} = 'nshardware';
+	$params{'objectname'} = undef;
+	$params{'options'}    = undef;
+
+	my $response = nitro_client($plugin, \%params);
+	$response = $response->{$params{'objecttype'}};
+
+	$plugin->add_message(OK, "Platform: " . $response->{'hwdescription'} . ' ' . $response->{'sysid'} . ';');
+	$plugin->add_message(OK, "Manufactured on: " . $response->{'manufactureyear'} . '/' . $response->{'manufacturemonth'} . '/' . $response->{'manufactureday'} . ';');
+	$plugin->add_message(OK, "CPU: " . $response->{'cpufrequncy'} . 'MHz;');
+	$plugin->add_message(OK, "Serial no: " . $response->{'serialno'} . ';');
+
+	$params{'objecttype'} = 'nsversion';
+
+	$response = nitro_client($plugin, \%params);
+	$response = $response->{$params{'objecttype'}};
+
+	$plugin->add_message(OK, "Build Version: " . $response->{'version'} . ';');
+
+	my ($code, $message) = $plugin->check_messages;
+	$plugin->nagios_exit($code, 'INFO: ' . $message);
+}
+
+sub get_performancedata
 {
 	my $plugin = shift;
-	
+
 	my %params;
 	$params{'endpoint'}   = $plugin->opts->endpoint || 'stat';
 	$params{'objecttype'} = $plugin->opts->objecttype;
+	$params{'objectname'} = undef;
+	$params{'options'}    = undef;
+
+	if (not defined ($plugin->opts->objectname)) {
+		$plugin->nagios_die('performancedata: no object name(s) "-n" set');
+	}
+
+	my $response = nitro_client($plugin, \%params);
+	$response = $response->{$params{'objecttype'}};
+
+	if ( ref $response eq "ARRAY" ) {
+		foreach $response (@{$response}) {
+			foreach my $objectname (split(",",$plugin->opts->objectname)) {
+				if (not index($objectname, ".") != -1) {
+					$plugin->nagios_die('performancedata: return data is an array and contains multible objects. You need te seperate id and name with a ".".');
+				}
+
+				my ($objectname_id, $objectname_name) = split /\./, $objectname;
+
+				if (not defined($response->{$objectname_id})) {
+					$plugin->nagios_die('performancedata: object id "' . $objectname_id . '" not found in output.');
+				}
+				if (not defined($response->{$objectname_name})) {
+					$plugin->nagios_die('performancedata: object name "' . $objectname_name . '" not found in output.');
+				}
+
+				$plugin->add_message(OK, $params{'objecttype'} . "." . $response->{$objectname_id} . "." . $objectname_name . ":" . $response->{$objectname_name} . ",");
+
+				$plugin->add_perfdata(
+					label    => "'" . $params{'objecttype'} . "." . $response->{$objectname_id} . "." . $objectname_name . "'",
+					value    => $response->{$objectname_name},
+					min      => undef,
+					max      => undef,
+					warning  => $plugin->opts->warning,
+					critical => $plugin->opts->critical,
+				);
+			}
+		}
+	} elsif ( ref $response eq "HASH" ) {
+		foreach my $objectname (split(",",$plugin->opts->objectname)) {
+			if (not defined($response->{$objectname})) {
+				$plugin->nagios_die('performancedata: object name "' . $objectname . '" not found in output.');
+			}
+			$plugin->add_message(OK, $params{'objecttype'} . "." . $objectname .":", $response->{$objectname}. ",");
+
+			$plugin->add_perfdata(
+				label    => "'" . $params{'objecttype'} . "." . $objectname . "'",
+				value    => $response->{$objectname},
+				min      => undef,
+				max      => undef,
+				warning  => $plugin->opts->warning,
+				critical => $plugin->opts->critical,
+			);
+		}
+	} else {
+		$plugin->nagios_die('performancedata: unable to parse data. Returned data is not a HASH or ARRAY!');
+	}
+
+	my ($code, $message) = $plugin->check_messages;
+	$plugin->nagios_exit($code, 'performancedata: ' . $message);
+}
+
+sub check_interfaces
+{
+	my $plugin = shift;
+	my @interface_errors;
+
+	my %params;
+	$params{'endpoint'}   = 'config';
+	$params{'objecttype'} = 'interface';
+	$params{'objectname'} = undef;
+	$params{'options'}    = undef;
+
+	my $response = nitro_client($plugin, \%params);
+
+	foreach my $interface (@{$response->{'Interface'}}) {
+
+		my $interface_state = OK;
+
+		my $interface_speed = "N/A";
+		if ($interface->{'actspeed'}) { $interface_speed = $interface->{'actspeed'}; }
+
+		if ($interface->{'linkstate'} != 1 ) {
+			push(@interface_errors, "interface " . $interface->{'devicename'} . " has linkstate \"DOWN\"");
+			$interface_state = CRITICAL;
+		}
+		if ($interface->{'intfstate'} != 1 ) {
+			push(@interface_errors, "interface " . $interface->{'devicename'} . " has intstate \"DOWN\"");
+			$interface_state = CRITICAL;
+		}
+		if ($interface->{'state'} ne "ENABLED" ) {
+			push(@interface_errors, "interface " . $interface->{'devicename'} . " has state \"".$interface->{'state'}."\"");
+			$interface_state = CRITICAL;
+		}
+
+		$plugin->add_message($interface_state, "device: " . $interface->{'devicename'} . ' (speed: ' . $interface_speed . ', MTU: ' . $interface->{'actualmtu'} . ', VLAN: ' . $interface->{'vlan'} . ', type: ' . $interface->{'intftype'} . ') ' . $interface->{'state'} . ';');
+
+		$plugin->add_perfdata(
+			label    => "\'".$interface->{'devicename'} . ".rxbytes'",
+			value    => $interface->{'rxbytes'}."B"
+		);
+		$plugin->add_perfdata(
+			label    => "\'".$interface->{'devicename'} . ".txbytes'",
+			value    => $interface->{'txbytes'}."B"
+		);
+		$plugin->add_perfdata(
+			label    => "\'".$interface->{'devicename'} . ".rxerrors'",
+			value    => $interface->{'rxerrors'}."c"
+		);
+		$plugin->add_perfdata(
+			label    => "\'".$interface->{'devicename'} . ".txerrors'",
+			value    => $interface->{'txerrors'}."c"
+		);
+	}
+
+	my ($code, $message) = $plugin->check_messages;
+	if (scalar @interface_errors != 0 ) {
+		$message = join(", ",@interface_errors). " - ". $message
+	}
+	$plugin->nagios_exit($code, 'Interfaces: ' . $message);
+}
+
+sub check_servicegroup
+{
+	my $plugin = shift;
+	my @servicegroup_errors;
+
+	# define quorum (in percent) of working servicegroup members
+	my $member_quorum_warning = $plugin->opts->warning || "90";
+	my $member_quorum_critical = $plugin->opts->critical || "50";
+
+	my %member_state;
+
+	my %params;
+	$params{'endpoint'}   = 'config';
+	$params{'objecttype'} = 'servicegroup';
 	$params{'objectname'} = $plugin->opts->objectname;
 	$params{'options'}    = undef;
-	
+
+	if (not defined ($plugin->opts->objectname)) {
+		$plugin->nagios_die('servicegroup: no object name "-n" set');
+	}
+
+	my %healthy_servicegroup_states;
+	$healthy_servicegroup_states{"state"} = "ENABLED";
+	$healthy_servicegroup_states{"servicegroupeffectivestate"} = "UP";
+	$healthy_servicegroup_states{"monstate"} = "ENABLED";
+	$healthy_servicegroup_states{"healthmonitor"} = "YES";
+
+	my %healthy_servicegroup_member_states;
+	$healthy_servicegroup_member_states{"state"} = "ENABLED";
+	$healthy_servicegroup_member_states{"svrstate"} = "UP";
+
 	my $response = nitro_client($plugin, \%params);
-	
+	my $servicegroup_response = $response->{$params{'objecttype'}};
+	my $servicegroup_state = OK;
+
+	# check servicegroup health status
+	foreach my $servicegroup_response (@{$servicegroup_response}) {
+
+		foreach my $servicegroup_check_key ( keys %healthy_servicegroup_states ) {
+
+			if ($servicegroup_response->{$servicegroup_check_key} ne $healthy_servicegroup_states{$servicegroup_check_key}) {
+				push(@servicegroup_errors, 'servicegroup ' . $servicegroup_response->{"servicegroupname"} . ' "'. $servicegroup_check_key . '" is: '. $healthy_servicegroup_states{$servicegroup_check_key});
+			}
+		}
+		$plugin->add_message(OK, $servicegroup_response->{'servicegroupname'} . ' (' . $servicegroup_response->{'servicetype'} . ') - state: ' . $servicegroup_response->{'servicegroupeffectivestate'} . ' -');
+	}
+
+	# get servicegroup members status
+	$params{'objecttype'} = 'servicegroup_servicegroupmember_binding';
+
+	$response = nitro_client($plugin, \%params);
+	my $servicegroup_members_response = $response->{$params{'objecttype'}};
+
+	# check servicegroup members health status
+	foreach my $servicegroup_members_response (@{$servicegroup_members_response}) {
+
+		foreach my $servicegroup_members_check_key ( keys %healthy_servicegroup_member_states ) {
+
+			if ($servicegroup_members_response->{$servicegroup_members_check_key} ne $healthy_servicegroup_member_states{$servicegroup_members_check_key}) {
+				push(@servicegroup_errors, 'servicegroup member ' . $servicegroup_members_response->{"servername"} . ' "'. $servicegroup_members_check_key . '" is '. $healthy_servicegroup_member_states{$servicegroup_members_check_key});
+				$member_state{$servicegroup_members_response->{"servername"}} = "DOWN";
+			}
+		}
+		if (not defined $member_state{$servicegroup_members_response->{"servername"}}) {
+			$member_state{$servicegroup_members_response->{"servername"}} = "UP";
+		}
+		$plugin->add_message(OK, $servicegroup_members_response->{'servername'} . ' (' . $servicegroup_members_response->{'ip'}.':'. $servicegroup_members_response->{'port'} . ') is ' . $servicegroup_members_response->{'svrstate'} .',');
+	}
+
+	# count states
+	my $members_up = 0;
+	my $members_down = 0;
+	foreach my $member_state_key ( keys %member_state ) {
+		if ($member_state{$member_state_key} eq "DOWN") {
+			$members_down++;
+		} else {
+			$members_up++;
+		}
+	}
+
+	# check quorum
+	my $member_quorum = sprintf("%1.2f", 100 / ( $members_up + $members_down ) * $members_up);
+
+	if ($member_quorum <= $member_quorum_critical) {
+		$servicegroup_state = CRITICAL;
+	} elsif ($member_quorum <= $member_quorum_warning) {
+		$servicegroup_state = WARNING;
+	}
+
+	$plugin->add_message(OK, "member quorum: " . $member_quorum . "% (UP/DOWN): " . $members_up . "/" . $members_down);
+
+	$plugin->add_perfdata(
+		label    => "'" . $plugin->opts->objectname . ".member_quorum'",
+		value    => $member_quorum."%",
+		min      => 0,
+		max      => 100,
+		warning  => $member_quorum_warning,
+		critical => $member_quorum_critical,
+	);
+
+	my ($code, $message) = $plugin->check_messages;
+	if (scalar @servicegroup_errors != 0 ) {
+		$message = join(", ",@servicegroup_errors). " - ". $message
+	}
+	$plugin->nagios_exit($servicegroup_state, 'servicegroup: ' . $message);
+}
+
+sub check_debug
+{
+	my $plugin = shift;
+
+	my %params;
+	$params{'endpoint'}   = $plugin->opts->endpoint || 'stat';
+	$params{'objecttype'} = $plugin->opts->objecttype;
+	$params{'objectname'} = $plugin->opts->objectname;
+	$params{'options'}    = $plugin->opts->urlopts;
+
+	my $response = nitro_client($plugin, \%params);
+
 	print Dumper($response);
 }
diff --git a/examples/icinga2_command.conf b/examples/icinga2_command.conf
new file mode 100644
index 0000000..3494fce
--- /dev/null
+++ b/examples/icinga2_command.conf
@@ -0,0 +1,23 @@
+object CheckCommand "netscaler" {
+        import "plugin-check-command"
+
+        command = [ PluginDir + "/check_netscaler.pl" ]
+
+        arguments = {
+		"-H" = "$address$"
+		"-u" = "$netscaler_user$"
+		"-p" = "$netscaler_password$"
+		"--ssl" = {
+                        set_if = "$netscaler_ssl$"
+                }
+		"-P" = "$netscaler_port$"
+		"-C" = "$netscaler_command$"
+		"-o" = "$netscaler_objecttype$"
+		"-n" = "$netscaler_objectname$"
+		"-e" = "$netscaler_endpoint$"
+		"-w" = "$warning$"
+		"-c" = "$critical$"
+		"-t" = "$netscaler_timeout$"
+	}
+
+}
diff --git a/examples/icinga2_service_definitions.conf b/examples/icinga2_service_definitions.conf
new file mode 100644
index 0000000..e6d63d5
--- /dev/null
+++ b/examples/icinga2_service_definitions.conf
@@ -0,0 +1,139 @@
+/*******************************
+	NetScaler Checks
+*******************************/
+template Service "netscaler_env_details" {
+
+	vars.netscaler_user = "icinga"
+	vars.netscaler_password = "super_secret"
+	vars.netscaler_ssl = true
+}
+
+apply Service "CPU" {
+	import "netscaler_cpu_template"
+	import "netscaler_env_details"
+
+	assign where host.vars.hw_type == "Netscaler" && host.vars.ns_env == "my_netscaler_env_a"
+}
+
+apply Service "Mgmt CPU" {
+	import "netscaler_mgmtcpu_template"
+	import "netscaler_env_details"
+
+	assign where host.vars.hw_type == "Netscaler" && host.vars.ns_env == "my_netscaler_env_a"
+}
+
+apply Service "MEM" {
+	import "netscaler_mem_template"
+	import "netscaler_env_details"
+
+	assign where host.vars.hw_type == "Netscaler" && host.vars.ns_env == "my_netscaler_env_a"
+}
+
+apply Service "Disk 0" {
+	import "netscaler_disk0_template"
+	import "netscaler_env_details"
+
+	assign where host.vars.hw_type == "Netscaler" && host.vars.ns_env == "my_netscaler_env_a"
+}
+
+apply Service "Disk 1" {
+	import "netscaler_disk1_template"
+	import "netscaler_env_details"
+
+	assign where host.vars.hw_type == "Netscaler" && host.vars.ns_env == "my_netscaler_env_a"
+}
+
+apply Service "HA Status" {
+	import "netscaler_ha_status_template"
+	import "netscaler_env_details"
+
+	assign where host.vars.hw_type == "Netscaler" && host.vars.ns_env == "my_netscaler_env_a"
+}
+
+apply Service "HA State" {
+	import "netscaler_ha_state_template"
+	import "netscaler_env_details"
+
+	assign where host.vars.hw_type == "Netscaler" && host.vars.ns_env == "my_netscaler_env_a"
+}
+
+apply Service "Config Status" {
+	import "netscaler_config_status_template"
+	import "netscaler_env_details"
+
+	assign where host.vars.hw_type == "Netscaler" && host.vars.ns_env == "my_netscaler_env_a"
+}
+
+apply Service "HW Info" {
+	import "netscaler_hwinfo_template"
+	import "netscaler_env_details"
+
+	assign where host.vars.hw_type == "Netscaler" && host.vars.ns_env == "my_netscaler_env_a"
+}
+
+apply Service "Interfaces" {
+	import "netscaler_interfaces_template"
+	import "netscaler_env_details"
+
+	assign where host.vars.hw_type == "Netscaler" && host.vars.ns_env == "my_netscaler_env_a"
+}
+
+apply Service "Load Balanced server status" {
+	import "netscaler_server_template"
+	import "netscaler_env_details"
+
+	assign where host.vars.hw_type == "Netscaler" && host.vars.ns_env == "my_netscaler_env_a"
+}
+
+apply Service "STA Status " for (vpnverver in [ "my_vpnvserver" ] ) {
+	import "netscaler_staserver_template"
+	import "netscaler_env_details"
+
+	vars.netscaler_objectname = vpnverver
+	assign where host.vars.hw_type == "Netscaler" && host.vars.ns_env == "my_netscaler_env_a"
+}
+
+apply Service "VPNV Status " for (vpnverver in [ "my_vpnvserver_a"  ] ) {
+	import "netscaler_vpnvserver_template"
+	import "netscaler_env_details"
+
+	vars.netscaler_objectname = vpnverver
+	assign where host.vars.hw_type == "Netscaler" && host.vars.ns_env == "my_netscaler_env_a"
+}
+
+apply Service "LB Status " for (lbvserver in [ "my_lbvserver_a", "my_lbvserver_b" ] ) {
+	import "netscaler_lbvserver_template"
+	import "netscaler_env_details"
+
+	vars.netscaler_objectname = lbvserver
+	assign where host.vars.hw_type == "Netscaler" && host.vars.ns_env == "my_netscaler_env_a"
+}
+
+apply Service "Servicegroup Status " for (servicegroup in [ "my_servicegroup_a", "my_servicegroup_b" ] ) {
+	import "netscaler_servicegroup_template"
+	import "netscaler_env_details"
+
+	vars.netscaler_objectname = servicegroup
+	assign where host.vars.hw_type == "Netscaler" && host.vars.ns_env == "my_netscaler_env_a"
+}
+
+// Perfdata
+apply Service "Perf Ctirix Sessions" {
+	import "netscaler_performancedata_template"
+	import "netscaler_env_details"
+
+	vars.netscaler_objecttype = "aaa"
+	vars.netscaler_objectname = "aaacuricasessions,aaacuricaonlyconn"
+	assign where host.vars.hw_type == "Netscaler" && host.vars.ns_env == "my_netscaler_env_a"
+}
+
+apply Service "Perf TCP connections" {
+	import "netscaler_performancedata_template"
+	import "netscaler_env_details"
+
+	vars.netscaler_objecttype = "ns"
+	vars.netscaler_objectname = "tcpcurclientconn,tcpcurclientconnestablished,tcpcurserverconn,tcpcurserverconnestablished"
+	assign where host.vars.hw_type == "Netscaler" && host.vars.ns_env == "my_netscaler_env_a"
+}
+
+/* EOF */
diff --git a/examples/icinga2_service_templates.conf b/examples/icinga2_service_templates.conf
new file mode 100644
index 0000000..c755847
--- /dev/null
+++ b/examples/icinga2_service_templates.conf
@@ -0,0 +1,188 @@
+/*
+ *	service templates for check_netscaler.pl
+ */
+
+// Health Checks
+template Service "netscaler_cpu_template" {
+	import "generic-service"
+	import "perf_enabled"
+
+	check_command = "netscaler"
+
+	vars.netscaler_command = "above"
+	vars.netscaler_objecttype = "system"
+	vars.netscaler_objectname = "cpuusagepcnt"
+
+	vars.warning = 75
+	vars.critical = 80
+}
+
+template Service "netscaler_mem_template" {
+	import "generic-service"
+	import "perf_enabled"
+
+	check_command = "netscaler"
+
+	vars.netscaler_command = "above"
+	vars.netscaler_objecttype = "system"
+	vars.netscaler_objectname = "memusagepcnt"
+
+	vars.warning = 75
+	vars.critical = 80
+}
+
+template Service "netscaler_mgmtcpu_template" {
+	import "generic-service"
+	import "perf_enabled"
+
+	check_command = "netscaler"
+
+	vars.netscaler_command = "above"
+	vars.netscaler_objecttype = "system"
+	vars.netscaler_objectname = "mgmtcpuusagepcnt"
+
+	vars.warning = 75
+	vars.critical = 80
+}
+
+template Service "netscaler_disk0_template" {
+	import "generic-service"
+	import "perf_enabled"
+
+	check_command = "netscaler"
+
+	vars.netscaler_command = "above"
+	vars.netscaler_objecttype = "system"
+	vars.netscaler_objectname = "disk0perusage"
+
+	vars.warning = 75
+	vars.critical = 80
+}
+
+template Service "netscaler_disk1_template" {
+	import "generic-service"
+	import "perf_enabled"
+
+	check_command = "netscaler"
+
+	vars.netscaler_command = "above"
+	vars.netscaler_objecttype = "system"
+	vars.netscaler_objectname = "disk1perusage"
+
+	vars.warning = 75
+	vars.critical = 80
+}
+
+// HA Status
+template Service "netscaler_ha_status_template" {
+	import "generic-service"
+
+	check_command = "netscaler"
+
+	vars.netscaler_command = "string_not"
+	vars.netscaler_objecttype = "hanode"
+	vars.netscaler_objectname = "hacurstatus"
+
+	vars.warning = "YES"
+	vars.critical = "YES"
+}
+
+template Service "netscaler_ha_state_template" {
+	import "generic-service"
+
+	check_command = "netscaler"
+
+	vars.netscaler_command = "string_not"
+	vars.netscaler_objecttype = "hanode"
+	vars.netscaler_objectname = "hacurstate"
+
+	vars.warning = "UP"
+	vars.critical = "UP"
+}
+
+// Config Changes
+template Service "netscaler_config_status_template" {
+	import "generic-service"
+
+	check_command = "netscaler"
+
+	vars.netscaler_command = "nsconfig"
+}
+
+// Netscaler info
+template Service "netscaler_hwinfo_template" {
+	import "generic-service"
+	
+	check_command = "netscaler"
+
+	vars.netscaler_command = "hwinfo"
+}
+
+// Interfaces status
+template Service "netscaler_interfaces_template" {
+	import "generic-service"
+	import "perf_enabled"
+	
+	check_command = "netscaler"
+
+	vars.netscaler_command = "interfaces"
+}
+
+// Server Status
+template Service "netscaler_staserver_template" {
+	import "generic-service"
+
+	check_command = "netscaler"
+
+	vars.netscaler_command = "staserver"
+}
+
+template Service "netscaler_server_template" {
+	import "generic-service"
+
+	check_command = "netscaler"
+
+	vars.netscaler_command = "server"
+}
+
+template Service "netscaler_lbvserver_template" {
+	import "generic-service"
+	import "perf_enabled"
+	
+	check_command = "netscaler"
+
+	vars.netscaler_command = "state"
+	vars.netscaler_objecttype = "lbvserver"
+}
+
+template Service "netscaler_vpnvserver_template" {
+	import "generic-service"
+	import "perf_enabled"
+	
+	check_command = "netscaler"
+
+	vars.netscaler_command = "state"
+	vars.netscaler_objecttype = "vpnvserver"
+}
+
+// Servicegroup status
+template Service "netscaler_servicegroup_template" {
+	import "generic-service"
+	import "perf_enabled"
+	
+	check_command = "netscaler"
+
+	vars.netscaler_command = "servicegroup"
+}
+
+// Performancedata
+template Service "netscaler_performancedata_template" {
+	import "generic-service"
+	import "perf_enabled"
+	
+	check_command = "netscaler"
+
+	vars.netscaler_command = "performancedata"
+}
+
+// EOF