diff --git a/automated install/basic-install.sh b/automated install/basic-install.sh
index b3e6202f..927f00ac 100755
--- a/automated install/basic-install.sh	
+++ b/automated install/basic-install.sh	
@@ -321,6 +321,26 @@ function valid_ip()
 	return $stat
 }
 
+function valid_ip_and_port()
+{
+	# Validate IP and port matches dnsmasq conf syntax
+	# For example '127.0.0.1#40'
+	local  ip=$1
+	local  stat=1
+	
+	if [[ $ip =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}#[0-9]{1,5}$ ]]; then
+		OIFS=$IFS
+		IFS='.#'
+		ip=($ip)
+		IFS=$OIFS
+		[[ ${ip[0]} -le 255 && ${ip[1]} -le 255 \
+		&& ${ip[2]} -le 255 && ${ip[3]} -le 255 \
+		&& ${ip[4]} -le 65535 ]]
+		stat=$?
+	fi
+	return $stat
+}
+
 setDNS(){
 	DNSChoseCmd=(whiptail --separate-output --radiolist "Select Upstream DNS Provider. To use your own, select Custom." $r $c 6)
 	DNSChooseOptions=(Google "" on
@@ -375,16 +395,16 @@ setDNS(){
 						prePopulate="$piholeDNS1, $piholeDNS2"
 					fi
 					
-					piholeDNS=$(whiptail --backtitle "Specify Upstream DNS Provider(s)"  --inputbox "Enter your desired upstream DNS provider(s), seperated by a comma.\n\nFor example '8.8.8.8, 8.8.4.4'" $r $c "$prePopulate" 3>&1 1>&2 2>&3)
+					piholeDNS=$(whiptail --backtitle "Specify Upstream DNS Provider(s)"  --inputbox "Enter your desired upstream DNS provider(s), seperated by a comma.\n\nFor example '8.8.8.8, 8.8.4.4'\n\nIf the DNS server uses a custom port, append it following the hash symbol.\n\nFor example '127.0.0.1#40, 127.0.0.1#41'" $r $c "$prePopulate" 3>&1 1>&2 2>&3)
 					if [[ $? = 0 ]];then
 						piholeDNS1=$(echo $piholeDNS | sed 's/[, \t]\+/,/g' | awk -F, '{print$1}')
 						piholeDNS2=$(echo $piholeDNS | sed 's/[, \t]\+/,/g' | awk -F, '{print$2}')
 						
-						if ! valid_ip $piholeDNS1 || [ ! $piholeDNS1 ]; then
+						if ! (valid_ip $piholeDNS1 || valid_ip_and_port $piholeDNS1) || [ ! $piholeDNS1 ]; then
 							piholeDNS1=$strInvalid
 						fi
 												
-						if ! valid_ip $piholeDNS2 && [ $piholeDNS2 ]; then
+						if ! (valid_ip $piholeDNS2 || valid_ip_and_port $piholeDNS2) && [ $piholeDNS2 ]; then
 							piholeDNS2=$strInvalid
 						fi