diff --git a/advanced/Scripts/check-functionality.sh b/advanced/Scripts/check-functionality.sh
new file mode 100755
index 00000000..a69a49c5
--- /dev/null
+++ b/advanced/Scripts/check-functionality.sh
@@ -0,0 +1,115 @@
+#!/usr/bin/env bash
+
+
+IPv4dev=$(/sbin/ip route get 8.8.8.8 | awk '{for(i=1;i<=NF;i++)if($i~/dev/)print $(i+1)}')
+piholeIPCIDR=$(/sbin/ip -o -f inet addr show dev $IPv4dev | awk '{print $4}' | awk 'END {print}')
+piholeIP=${piholeIPCIDR%/*}
+
+adList=/etc/pihole/gravity.list
+blackList=/etc/pihole/blacklist.txt
+whiteList=/etc/pihole/whitelist.txt
+goodListNames="google-public-dns-a.google.com google-public-dns-b.google.com"
+
+
+# Function to resolve hostname and determine if IP is RFC1918, pi-hole, or internet address for the host.
+# Accepts 1 argument which is a host to resolve.
+verifyHostAddress() {
+    status=""
+    ip=`nslookup $1 192.168.100.122 | grep ^"Address:" | tail -1 | cut -d: -f2 | sed 's/ //g'`
+
+    if [[ $ip == $piholeIP ]]; then
+        status="pi-hole IP"
+    elif [[ $ip =~ (^127\.)|(^10\.)|(^172\.1[6-9]\.)|(^172\.2[0-9]\.)|(^172\.3[0-1]\.)|(^192\.168\.) ]]; then
+        status="RFC1918"
+    else
+        status=$ip
+    fi
+}
+
+
+if [[ -r $adList ]];then
+    adListNames=""
+    numberOf=$(cat $adList | sed '/^\s*$/d' | wc -l)
+    for n in `shuf -i 1-$numberOf -n 2`
+    do
+        adListNames="$adListNames `sed -n ${n}p $adList | cut -d\  -f2`"
+    done
+fi
+
+
+if [[ -r $blackList ]];then
+    blackListNames=""
+    numberOf=$(cat $blackList | sed '/^\s*$/d' | wc -l)
+    for n in `shuf -i 1-$numberOf -n 2`
+    do
+        blackListNames="$blackListNames `sed -n ${n}p $blackList`"
+    done
+fi
+
+
+if [[ -r $whiteList ]];then
+    whiteListNames=""
+    numberOf=$(cat $whiteList | sed '/^\s*$/d' | wc -l)
+    for n in `shuf -i 1-$numberOf -n 2`
+    do
+        whiteListNames="$whiteListNames `sed -n ${n}p $whiteList`"
+    done
+fi
+
+
+echo -e "\nTesting known good websites."
+for name in $goodListNames
+do
+    verifyHostAddress "$name"
+    if [[ "$status" == "pi-hole IP" ]]; then
+        echo -e "\tFailed - $name resolves to your pi-hole ($piholeIP)"
+    elif [[ "$status" == "RFC1918" ]]; then
+        echo -e "\tFailed - $name resolves to a non-routable address ($ip)"
+    else
+        echo -e "\tSuccess - $name resolves to a public IP address ($ip)"
+    fi
+done
+
+
+echo -e "\nTesting websites from your $whiteList file."
+for name in $whiteListNames
+do
+    verifyHostAddress "$name"
+    if [[ "$status" == "pi-hole IP" ]]; then
+        echo -e "\tFailed - $name resolves to your pi-hole ($piholeIP)"
+    elif [[ "$status" == "RFC1918" ]]; then
+        echo -e "\tFailed - $name resolves to a non-routable address ($ip)"
+    else
+        echo -e "\tSuccess - $name resolves to a public IP address ($ip)"
+    fi
+done
+
+
+echo -e "\nTesting websites from your $adList file."
+for name in $adListNames
+do
+    verifyHostAddress "$name"
+    if [[ "$status" == "pi-hole IP" ]]; then
+        echo -e "\tSuccess - $name resolves to your pi-hole ($ip)"
+    elif [[ "$status" == "RFC1918" ]]; then
+        echo -e "\tVerify - $name resolves to a non-routable address that is not your pi-hole server ($ip)"
+    else
+        echo -e "\tFailed - $name resolves to a public IP address ($ip)"
+    fi
+done
+
+
+echo -e "\nTesting websites from your $blackList file."
+for name in $blackListNames
+do
+    verifyHostAddress "$name"
+    if [[ "$status" == "pi-hole IP" ]]; then
+        echo -e "\tSuccess - $name resolves to your pi-hole ($ip)"
+    elif [[ "$status" == "RFC1918" ]]; then
+        echo -e "\tVerify - $name resolves to a non-routable address that is not your pi-hole server ($ip)"
+    else
+        echo -e "\tFailed - $name resolves to a public IP address ($ip)"
+    fi
+done
+
+