diff --git a/install/install.php b/install/install.php
index 0a58398e..b0bded86 100644
--- a/install/install.php
+++ b/install/install.php
@@ -26,6 +26,8 @@
 use Froxlor\UI\Panel\UI;
 use Froxlor\Install\Install;
 
+require dirname(__DIR__) . '/lib/functions.php';
+
 // define default theme for configurehint, etc.
 $_deftheme = 'Froxlor';
 
@@ -62,7 +64,5 @@ require dirname(__DIR__) . '/lib/tables.inc.php';
 UI::initTwig(true);
 UI::sendHeaders();
 
-require dirname(__DIR__) . '/lib/functions.php';
-
 $installer = new Install();
 $installer->handle();
diff --git a/lib/Froxlor/Install/Install.php b/lib/Froxlor/Install/Install.php
index 588434f3..d9c4fc52 100644
--- a/lib/Froxlor/Install/Install.php
+++ b/lib/Froxlor/Install/Install.php
@@ -35,6 +35,7 @@ use Froxlor\Validate\Validate;
 class Install
 {
 	public $currentStep;
+	public $extendedView;
 	public $maxSteps;
 	public $phpVersion;
 	public $formfield;
@@ -76,6 +77,7 @@ class Install
 
 		// set actual step
 		$this->currentStep = Request::get('step', 0);
+		$this->extendedView = Request::get('extended', 0);
 		$this->maxSteps = count($this->formfield['install']['sections']);
 
 		// set actual php version and extensions
@@ -112,13 +114,14 @@ class Install
 			'setup' => [
 				'step' => $this->currentStep,
 			],
-			'preflight' => $this->checkExtensions(),
+			'preflight' => $this->checkRequirements(),
 			'page' => [
 				'title' => 'Database',
 				'description' => 'Test',
 			],
 			'section' => $this->formfield['install']['sections']['step' . $this->currentStep] ?? [],
 			'error' => $error ?? null,
+			'extended' => $this->extendedView,
 		]);
 
 		// output view
@@ -171,8 +174,18 @@ class Install
 	/**
 	 * @return array
 	 */
-	private function checkExtensions(): array
+	private function checkRequirements(): array
 	{
+		// check whether we can read the userdata file
+		if (!@touch(dirname(__DIR__, 2).'/.~writecheck'	)) {
+			// get possible owner
+			$posixusername = posix_getpwuid(posix_getuid())['name'];
+			$posixgroup = posix_getgrgid(posix_getgid())['name'];
+			$this->criticals['wrong_ownership'] = ['user' => $posixusername, 'group' => $posixgroup];
+		} else {
+			@unlink(dirname(__DIR__, 2).'/.~writecheck');
+		}
+
 		// check for required extensions
 		foreach ($this->requiredExtensions as $requiredExtension) {
 			if (in_array($requiredExtension, $this->loadedExtensions)) {
diff --git a/lib/formfields/install/formfield.install.php b/lib/formfields/install/formfield.install.php
index ee2fdc76..5e650aa0 100644
--- a/lib/formfields/install/formfield.install.php
+++ b/lib/formfields/install/formfield.install.php
@@ -149,12 +149,18 @@ return [
 						'select_var' => $this->supportedOS,
 						'selected' => $guessedDistribution
 					],
-					'serverip' => [
-						'label' => lng('serversettings.ipaddress.title'),
-						'placeholder' => lng('serversettings.ipaddress.title'),
+					'serveripv4' => [
+						'label' => lng('install.system.ipv4'),
+						'placeholder' => lng('install.system.ipv4'),
 						'type' => 'text',
-						'mandatory' => true,
-						'value' => old('serverip', $_SERVER['SERVER_ADDR'] ?? null, 'installation'),
+						'value' => old('serveripv4', filter_var($_SERVER['SERVER_ADDR'] ?? "", FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) ? ($_SERVER['SERVER_ADDR'] ?? "") : "", 'installation'),
+
+					],
+					'serveripv6' => [
+						'label' => lng('install.system.ipv6'),
+						'placeholder' => lng('install.system.ipv6'),
+						'type' => 'text',
+						'value' => old('serveripv6', filter_var($_SERVER['SERVER_ADDR'] ?? "", FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) ? ($_SERVER['SERVER_ADDR'] ?? "") : "", 'installation'),
 					],
 					'servername' => [
 						'label' => lng('install.system.servername'),
@@ -189,6 +195,7 @@ return [
 						'type' => 'text',
 						'mandatory' => true,
 						'value' => old('httpuser', posix_getpwuid(posix_getuid())['name'] ?? '', 'installation'),
+						'advanced' => true,
 					],
 					'httpgroup' => [
 						'label' => lng('admin.webserver_group'),
@@ -196,6 +203,7 @@ return [
 						'type' => 'text',
 						'mandatory' => true,
 						'value' => old('httpgroup', posix_getgrgid(posix_getgid())['name'] ?? '', 'installation'),
+						'advanced' => true,
 					],
 					'activate_newsfeed' => [
 						'label' => lng('install.system.activate_newsfeed'),
diff --git a/lng/en.lng.php b/lng/en.lng.php
index 9c738ddb..24443e84 100644
--- a/lng/en.lng.php
+++ b/lng/en.lng.php
@@ -2489,6 +2489,8 @@ Yours sincerely, your administrator',
 			'top' => 'System setup',
 			'title' => 'Details about your server',
 			'description' => 'Set your environment as well as server relevant data and options here to let froxlor know about your system. These values are crucial for the system configuration and operating.',
+			'ipv4' => 'Primary IPv4 address (if applicable)',
+			'ipv6' => 'Primary IPv6 address (if applicable)',
 			'servername' => 'Server name (FQDN, no ip-address)',
 			'phpbackend' => 'PHP backend',
 			'activate_newsfeed' => 'Enable the official newsfeed<br><small>(https://inside.froxlor.org/news/)</small>',
diff --git a/templates/Froxlor/form/formfields.html.twig b/templates/Froxlor/form/formfields.html.twig
index 8aba63b2..198d7b93 100644
--- a/templates/Froxlor/form/formfields.html.twig
+++ b/templates/Froxlor/form/formfields.html.twig
@@ -63,17 +63,19 @@
 
 {# installation specific format #}
 {% macro field(id, field, norow = true, nohide = false, em = false) %}
-	{% if field.type != 'checkbox' %}
-	<div class="form-floating mb-3">
-		{{ _self.fieldrow(id, field, norow, nohide, em) }}
-		<label for="{{ id }}" class="form-label">{{ field.label|raw }}</label>
-	</div>
-	{% else %}
+	{% if field.type == 'checkbox' %}
 	<div class="form-check form-switch mb-3">
 		<input type="hidden" value="0" name="{{ id }}" />
 		<input type="checkbox" {% if (field.visible is defined and field.visible == false) or (field.disabled is defined and field.disabled == true) %} disabled {% endif %} value="{{ field.value }}" id="{{ id }}" name="{{ id }}" class="form-check-input {% if field.valid is defined and field.valid == false %}is-invalid{% endif %}" {% if field.checked is defined and field.checked == 1 %} checked="checked" {% endif %}>
 		<label for="{{ id }}" class="form-check-label">{{ field.label|raw }}</label>
 	</div>
+	{% elseif field.type == 'hidden' %}
+		{{ _self.fieldrow(id, field, norow, nohide, em) }}
+	{% else %}
+	<div class="form-floating mb-3">
+		{{ _self.fieldrow(id, field, norow, nohide, em) }}
+		<label for="{{ id }}" class="form-label">{{ field.label|raw }}</label>
+	</div>
 	{% endif %}
 {% endmacro %}
 
diff --git a/templates/Froxlor/install/index.html.twig b/templates/Froxlor/install/index.html.twig
index d7ae1d24..9831746b 100644
--- a/templates/Froxlor/install/index.html.twig
+++ b/templates/Froxlor/install/index.html.twig
@@ -42,6 +42,10 @@
 						{% import "Froxlor/form/formfields.html.twig" as formfields %}
 
 						{% for id, field in section.fields %}
+							{% if field.advanced is defined and field.advanced == true and extended == false %}
+								{# hide advanced fields #}
+								{% set field = field|merge({'type': 'hidden'})  %}
+							{% endif %}
 							{{ formfields.field(id, field) }}
 						{% endfor %}