diff --git a/installer.sh b/installer.sh
index 41155ea..b12ceed 100644
--- a/installer.sh
+++ b/installer.sh
@@ -128,6 +128,33 @@ else
 fi
 }
 
+function HostnameQuest {
+if (whiptail --title "Config" --yesno "                          Hostname with nxdi.nl" 11 78); then
+    hostname=$(whiptail --nocancel --inputbox "                      SystemID (eg: VCH001) without ".nxdi.nl"     " 11 82 --title "Config" 3>&1 1>&2 2>&3)
+    hostname=$hostname".nxdi.nl"
+else
+    hostname=$(whiptail --nocancel --inputbox "                              Hostname" 11 78 --title "Config" 3>&1 1>&2 2>&3)
+fi
+}
+
+function LegacyHostnameQuest {
+while true; do
+    read -p "Hostname with nxdi.nl -> yes/no?" yn
+    case $yn in
+        [Nn]* )
+        echo 'Enter full hostname:'
+        read hostname
+        break;;
+        [Yy]* )
+        echo 'Hostname (eg: VCH001) without ".nxdi.nl":'
+        read hostname
+        hostname=$hostname".nxdi.nl"
+        break;;
+        * )echo "Choose yes or no.";;
+    esac
+done
+}
+
 
 ##--------------------------##
 #   Installer-Requirements   #
@@ -148,13 +175,17 @@ source <(curl --retry 7 --retry-delay 5 -s "$repo"/raw/branch/"$branch"/ModulesM
 if [ $IMODE = n ]; then
 if [ $TestMode = 0 ]; then
 domain=$(whiptail --nocancel --inputbox "                        Enter the domain without WWW     " 11 82 --title "Config" 3>&1 1>&2 2>&3)
-if (whiptail --title "Config" --yesno "                 Does www.${domain} exist in DNS" 8 78); then domainwww=1; else domainwww=0; fi
-if (whiptail --title "Config" --yesno "                          Hostname with nxdi.nl" 11 78); then
-    hostname=$(whiptail --nocancel --inputbox "                      SystemID (eg: VCH001) without ".nxdi.nl"     " 11 82 --title "Config" 3>&1 1>&2 2>&3)
-    hostname=$hostname".nxdi.nl"
-else
-    hostname=$(whiptail --nocancel --inputbox "                              Hostname" 11 78 --title "Config" 3>&1 1>&2 2>&3)
-fi
+while true; do
+  HostnameQuest
+  if [[ "$hostname" == "$domain" ]] || [ -z "$hostname" ]
+  then
+     whiptail  --msgbox "   Hostname can't be empty, or be the same as the domain" 11 78
+  else 
+  break
+
+  fi
+done
+
 if (whiptail --title "Config" --yesno "                       Enable SSL on installation?" 11 78); then
    sslenable=1
 else
@@ -184,19 +215,14 @@ while true; do
     esac
 done
 while true; do
-    read -p "Hostname with nxdi.nl -> yes/no?" yn
-    case $yn in
-        [Nn]* )
-        echo 'Enter full hostname:'
-        read hostname
-        break;;
-        [Yy]* )
-        echo 'Hostname (eg: VCH001) without ".nxdi.nl":'
-        read hostname
-        hostname=$hostname".nxdi.nl"
-        break;;
-        * )echo "Choose yes or no.";;
-    esac
+  LegacyHostnameQuest
+  if [[ "$hostname" == "$domain" ]] || [ -z "$hostname" ]
+  then
+     echo "Hostname can't be empty, or be the same as the domain"
+  else 
+  break
+
+  fi
 done
 while true; do
     read -p "Enable SSL on installation? -> yes/no?" yn