diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..e970233
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.project
\ No newline at end of file
diff --git a/openvpn-install.sh b/openvpn-install.sh
index a31713a..5ed9a11 100755
--- a/openvpn-install.sh
+++ b/openvpn-install.sh
@@ -1,9 +1,22 @@
 #!/bin/bash
 # shellcheck disable=SC1091,SC2164,SC2034,SC1072,SC1073,SC1009
 
-# Secure OpenVPN server installer for Debian, Ubuntu, CentOS, Amazon Linux 2, Fedora, Oracle Linux 8, Arch Linux, Rocky Linux and AlmaLinux.
+# Secure OpenVPN server installer for Debian, Ubuntu, CentOS, Amazon Linux 2, Fedora, Oracle Linux 8, Arch Linux and Rocky Linux.
 # https://github.com/angristan/openvpn-install
 
+#-------------------------------------------
+# CONFIGURATION
+#-------------------------------------------
+IPNET="10.8.0.0"					# Network address
+IPADR="10.8.0.1"					# IP address of the server
+NETMASKCIDR="24"					# Netmask in CIDR
+NETMASK="255.255.255.0"					# Netmask
+IPADRCIDR="${IPADR}/${NETMASKCIDR}"
+IPNETCIDR="${IPNET}/${NETMASKCIDR}"
+#-------------------------------------------
+
+
+
 function isRoot() {
 	if [ "$EUID" -ne 0 ]; then
 		return 1
@@ -112,8 +125,8 @@ function installUnbound() {
 			apt-get install -y unbound
 
 			# Configuration
-			echo 'interface: 10.8.0.1
-access-control: 10.8.0.1/24 allow
+			echo 'interface: $IPADR
+access-control: $IPADRSCIDR allow
 hide-identity: yes
 hide-version: yes
 use-caps-for-id: yes
@@ -123,8 +136,8 @@ prefetch: yes' >>/etc/unbound/unbound.conf
 			yum install -y unbound
 
 			# Configuration
-			sed -i 's|# interface: 0.0.0.0$|interface: 10.8.0.1|' /etc/unbound/unbound.conf
-			sed -i 's|# access-control: 127.0.0.0/8 allow|access-control: 10.8.0.1/24 allow|' /etc/unbound/unbound.conf
+			sed -i 's|# interface: 0.0.0.0$|interface: $IPADR|' /etc/unbound/unbound.conf
+			sed -i 's|# access-control: 127.0.0.0/8 allow|access-control: $IPADRCIDR allow|' /etc/unbound/unbound.conf
 			sed -i 's|# hide-identity: no|hide-identity: yes|' /etc/unbound/unbound.conf
 			sed -i 's|# hide-version: no|hide-version: yes|' /etc/unbound/unbound.conf
 			sed -i 's|use-caps-for-id: no|use-caps-for-id: yes|' /etc/unbound/unbound.conf
@@ -133,8 +146,8 @@ prefetch: yes' >>/etc/unbound/unbound.conf
 			dnf install -y unbound
 
 			# Configuration
-			sed -i 's|# interface: 0.0.0.0$|interface: 10.8.0.1|' /etc/unbound/unbound.conf
-			sed -i 's|# access-control: 127.0.0.0/8 allow|access-control: 10.8.0.1/24 allow|' /etc/unbound/unbound.conf
+			sed -i 's|# interface: 0.0.0.0$|interface: $IPADR|' /etc/unbound/unbound.conf
+			sed -i 's|# access-control: 127.0.0.0/8 allow|access-control: $IPADRCIDR allow|' /etc/unbound/unbound.conf
 			sed -i 's|# hide-identity: no|hide-identity: yes|' /etc/unbound/unbound.conf
 			sed -i 's|# hide-version: no|hide-version: yes|' /etc/unbound/unbound.conf
 			sed -i 's|# use-caps-for-id: no|use-caps-for-id: yes|' /etc/unbound/unbound.conf
@@ -156,8 +169,8 @@ prefetch: yes' >>/etc/unbound/unbound.conf
 	directory: "/etc/unbound"
 	trust-anchor-file: trusted-key.key
 	root-hints: root.hints
-	interface: 10.8.0.1
-	access-control: 10.8.0.1/24 allow
+	interface: $IPADR
+	access-control: $IPADRCIDR allow
 	port: 53
 	num-threads: 2
 	use-caps-for-id: yes
@@ -191,8 +204,8 @@ private-address: ::ffff:0:0/96" >>/etc/unbound/unbound.conf
 
 		# Add Unbound 'server' for the OpenVPN subnet
 		echo 'server:
-interface: 10.8.0.1
-access-control: 10.8.0.1/24 allow
+interface: $IPADR
+access-control: $IPADRCIDR allow
 hide-identity: yes
 hide-version: yes
 use-caps-for-id: yes
@@ -779,7 +792,7 @@ persist-key
 persist-tun
 keepalive 10 120
 topology subnet
-server 10.8.0.0 255.255.255.0
+server $IPNET $NETMASK
 ifconfig-pool-persist ipp.txt" >>/etc/openvpn/server.conf
 
 	# DNS resolvers
@@ -801,7 +814,7 @@ ifconfig-pool-persist ipp.txt" >>/etc/openvpn/server.conf
 		done
 		;;
 	2) # Self-hosted DNS resolver (Unbound)
-		echo 'push "dhcp-option DNS 10.8.0.1"' >>/etc/openvpn/server.conf
+		echo 'push "dhcp-option DNS $IPADR"' >>/etc/openvpn/server.conf
 		if [[ $IPV6_SUPPORT == 'y' ]]; then
 			echo 'push "dhcp-option DNS fd42:42:42:42::1"' >>/etc/openvpn/server.conf
 		fi
@@ -965,7 +978,7 @@ verb 3" >>/etc/openvpn/server.conf
 
 	# Script to add rules
 	echo "#!/bin/sh
-iptables -t nat -I POSTROUTING 1 -s 10.8.0.0/24 -o $NIC -j MASQUERADE
+iptables -t nat -I POSTROUTING 1 -s $IPNETCIDR -o $NIC -j MASQUERADE
 iptables -I INPUT 1 -i tun0 -j ACCEPT
 iptables -I FORWARD 1 -i $NIC -o tun0 -j ACCEPT
 iptables -I FORWARD 1 -i tun0 -o $NIC -j ACCEPT
@@ -981,7 +994,7 @@ ip6tables -I INPUT 1 -i $NIC -p $PROTOCOL --dport $PORT -j ACCEPT" >>/etc/iptabl
 
 	# Script to remove rules
 	echo "#!/bin/sh
-iptables -t nat -D POSTROUTING -s 10.8.0.0/24 -o $NIC -j MASQUERADE
+iptables -t nat -D POSTROUTING -s $IPNETCIDR -o $NIC -j MASQUERADE
 iptables -D INPUT -i tun0 -j ACCEPT
 iptables -D FORWARD -i $NIC -o tun0 -j ACCEPT
 iptables -D FORWARD -i tun0 -o $NIC -j ACCEPT