From 75faa3a87e2dd1342be46fdb05a946665dbb6aa0 Mon Sep 17 00:00:00 2001
From: simono41 <simono41>
Date: Thu, 14 Dec 2017 11:30:32 -0500
Subject: [PATCH] original-script

---
 openvpn-install.sh | 1145 ++++++++++++++++++++++----------------------
 1 file changed, 569 insertions(+), 576 deletions(-)

diff --git a/openvpn-install.sh b/openvpn-install.sh
index d502256..939a9d2 100755
--- a/openvpn-install.sh
+++ b/openvpn-install.sh
@@ -1,84 +1,82 @@
 #!/bin/bash
 
-set -ex
-
 # Secure OpenVPN server installer for Debian, Ubuntu, CentOS and Arch Linux
 # https://github.com/Angristan/OpenVPN-install
 
 
 if [[ "$EUID" -ne 0 ]]; then
-    echo "Sorry, you need to run this as root"
-    exit 1
+	echo "Sorry, you need to run this as root"
+	exit 1
 fi
 
 if [[ ! -e /dev/net/tun ]]; then
-    echo "TUN is not available"
-    exit 2
+	echo "TUN is not available"
+	exit 2
 fi
 
 if grep -qs "CentOS release 5" "/etc/redhat-release"; then
-    echo "CentOS 5 is too old and not supported"
-    exit 3
+	echo "CentOS 5 is too old and not supported"
+	exit 3
 fi
 
 if [[ -e /etc/debian_version ]]; then
-    OS="debian"
-    # Getting the version number, to verify that a recent version of OpenVPN is available
-    VERSION_ID=$(cat /etc/os-release | grep "VERSION_ID")
-    IPTABLES='/etc/iptables/iptables.rules'
-    SYSCTL='/etc/sysctl.conf'
-    if [[ "$VERSION_ID" != 'VERSION_ID="7"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="8"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="9"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="12.04"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="14.04"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="16.04"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="16.10"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="17.04"' ]]; then
-        echo "Your version of Debian/Ubuntu is not supported."
-        echo "I can't install a recent version of OpenVPN on your system."
-        echo ""
-        echo "However, if you're using Debian unstable/testing, or Ubuntu beta,"
-        echo "then you can continue, a recent version of OpenVPN is available on these."
-        echo "Keep in mind they are not supported, though."
-        while [[ $CONTINUE != "y" && $CONTINUE != "n" ]]; do
-            read -p "Continue ? [y/n]: " -e CONTINUE
-        done
-        if [[ "$CONTINUE" = "n" ]]; then
-            echo "Ok, bye !"
-            exit 4
-        fi
-    fi
+	OS="debian"
+	# Getting the version number, to verify that a recent version of OpenVPN is available
+	VERSION_ID=$(cat /etc/os-release | grep "VERSION_ID")
+	IPTABLES='/etc/iptables/iptables.rules'
+	SYSCTL='/etc/sysctl.conf'
+	if [[ "$VERSION_ID" != 'VERSION_ID="7"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="8"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="9"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="12.04"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="14.04"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="16.04"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="16.10"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="17.04"' ]]; then
+		echo "Your version of Debian/Ubuntu is not supported."
+		echo "I can't install a recent version of OpenVPN on your system."
+		echo ""
+		echo "However, if you're using Debian unstable/testing, or Ubuntu beta,"
+		echo "then you can continue, a recent version of OpenVPN is available on these."
+		echo "Keep in mind they are not supported, though."
+		while [[ $CONTINUE != "y" && $CONTINUE != "n" ]]; do
+			read -p "Continue ? [y/n]: " -e CONTINUE
+		done
+		if [[ "$CONTINUE" = "n" ]]; then
+			echo "Ok, bye !"
+			exit 4
+		fi
+	fi
 elif [[ -e /etc/centos-release || -e /etc/redhat-release ]]; then
-    OS=centos
-    IPTABLES='/etc/iptables/iptables.rules'
-    SYSCTL='/etc/sysctl.conf'
+	OS=centos
+	IPTABLES='/etc/iptables/iptables.rules'
+	SYSCTL='/etc/sysctl.conf'
 elif [[ -e /etc/arch-release ]]; then
-    OS=arch
-    IPTABLES='/etc/iptables/iptables.rules'
-    SYSCTL='/etc/sysctl.d/openvpn.conf'
+	OS=arch
+	IPTABLES='/etc/iptables/iptables.rules'
+	SYSCTL='/etc/sysctl.d/openvpn.conf'
 else
-    echo "Looks like you aren't running this installer on a Debian, Ubuntu, CentOS or ArchLinux system"
-    exit 4
+	echo "Looks like you aren't running this installer on a Debian, Ubuntu, CentOS or ArchLinux system"
+	exit 4
 fi
 
 newclient () {
-    # Where to write the custom client.ovpn?
-    if [ -e /home/$1 ]; then  # if $1 is a user name
-        homeDir="/home/$1"
-    elif [ ${SUDO_USER} ]; then   # if not, use SUDO_USER
-        homeDir="/home/${SUDO_USER}"
-    else  # if not SUDO_USER, use /root
-        homeDir="/root"
-    fi
-    # Generates the custom client.ovpn
-    cp /etc/openvpn/client-template.txt $homeDir/$1.ovpn
-    echo "<ca>" >> $homeDir/$1.ovpn
-    cat /etc/openvpn/easy-rsa/pki/ca.crt >> $homeDir/$1.ovpn
-    echo "</ca>" >> $homeDir/$1.ovpn
-    echo "<cert>" >> $homeDir/$1.ovpn
-    cat /etc/openvpn/easy-rsa/pki/issued/$1.crt >> $homeDir/$1.ovpn
-    echo "</cert>" >> $homeDir/$1.ovpn
-    echo "<key>" >> $homeDir/$1.ovpn
-    cat /etc/openvpn/easy-rsa/pki/private/$1.key >> $homeDir/$1.ovpn
-    echo "</key>" >> $homeDir/$1.ovpn
-    echo "key-direction 1" >> $homeDir/$1.ovpn
-    echo "<tls-auth>" >> $homeDir/$1.ovpn
-    cat /etc/openvpn/tls-auth.key >> $homeDir/$1.ovpn
-    echo "</tls-auth>" >> $homeDir/$1.ovpn
+	# Where to write the custom client.ovpn?
+	if [ -e /home/$1 ]; then  # if $1 is a user name
+		homeDir="/home/$1"
+	elif [ ${SUDO_USER} ]; then   # if not, use SUDO_USER
+		homeDir="/home/${SUDO_USER}"
+	else  # if not SUDO_USER, use /root
+		homeDir="/root"
+	fi
+	# Generates the custom client.ovpn
+	cp /etc/openvpn/client-template.txt $homeDir/$1.ovpn
+	echo "<ca>" >> $homeDir/$1.ovpn
+	cat /etc/openvpn/easy-rsa/pki/ca.crt >> $homeDir/$1.ovpn
+	echo "</ca>" >> $homeDir/$1.ovpn
+	echo "<cert>" >> $homeDir/$1.ovpn
+	cat /etc/openvpn/easy-rsa/pki/issued/$1.crt >> $homeDir/$1.ovpn
+	echo "</cert>" >> $homeDir/$1.ovpn
+	echo "<key>" >> $homeDir/$1.ovpn
+	cat /etc/openvpn/easy-rsa/pki/private/$1.key >> $homeDir/$1.ovpn
+	echo "</key>" >> $homeDir/$1.ovpn
+	echo "key-direction 1" >> $homeDir/$1.ovpn
+	echo "<tls-auth>" >> $homeDir/$1.ovpn
+	cat /etc/openvpn/tls-auth.key >> $homeDir/$1.ovpn
+	echo "</tls-auth>" >> $homeDir/$1.ovpn
 }
 
 # Try to get our IP from the system and fallback to the Internet.
@@ -86,280 +84,278 @@ newclient () {
 # and to avoid getting an IPv6.
 IP=$(ip addr | grep 'inet' | grep -v inet6 | grep -vE '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | grep -o -E '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | head -1)
 if [[ "$IP" = "" ]]; then
-    IP=$(wget -qO- ipv4.icanhazip.com)
+	IP=$(wget -qO- ipv4.icanhazip.com)
 fi
 # Get Internet network interface with default route
-NIC=$(ip -4 route ls | grep default -m 1 | grep -Po '(?<=dev )(\S+)' | head -1)
+NIC=$(ip -4 route ls | grep default | grep -Po '(?<=dev )(\S+)' | head -1)
 
 if [[ -e /etc/openvpn/server.conf ]]; then
-    while :
-    do
-        clear
-        echo "OpenVPN-install (github.com/Angristan/OpenVPN-install)"
-        echo ""
-        echo "Looks like OpenVPN is already installed"
-        echo ""
-        echo "What do you want to do?"
-        echo "   1) Add a cert for a new user"
-        echo "   2) Revoke existing user cert"
-        echo "   3) Remove OpenVPN"
-        echo "   4) Exit"
-        read -p "Select an option [1-4]: " option
-        case $option in
-            1)
-                echo ""
-                echo "Tell me a name for the client cert"
-                echo "Please, use one word only, no special characters"
-                read -p "Client name: " -e -i client CLIENT
-                cd /etc/openvpn/easy-rsa/
-                ./easyrsa build-client-full $CLIENT nopass
-                # Generates the custom client.ovpn
-                newclient "$CLIENT"
-                echo ""
-                echo "Client $CLIENT added, certs available at $homeDir/$CLIENT.ovpn"
-                exit
-                ;;
-            2)
-                NUMBEROFCLIENTS=$(tail -n +2 /etc/openvpn/easy-rsa/pki/index.txt | grep -c "^V")
-                if [[ "$NUMBEROFCLIENTS" = '0' ]]; then
-                    echo ""
-                    echo "You have no existing clients!"
-                    exit 5
-                fi
-                echo ""
-                echo "Select the existing client certificate you want to revoke"
-                tail -n +2 /etc/openvpn/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | nl -s ') '
-                if [[ "$NUMBEROFCLIENTS" = '1' ]]; then
-                    read -p "Select one client [1]: " CLIENTNUMBER
-                else
-                    read -p "Select one client [1-$NUMBEROFCLIENTS]: " CLIENTNUMBER
-                fi
-                CLIENT=$(tail -n +2 /etc/openvpn/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | sed -n "$CLIENTNUMBER"p)
-                cd /etc/openvpn/easy-rsa/
-                ./easyrsa --batch revoke $CLIENT
-                EASYRSA_CRL_DAYS=3650 ./easyrsa gen-crl
-                rm -rf pki/reqs/$CLIENT.req
-                rm -rf pki/private/$CLIENT.key
-                rm -rf pki/issued/$CLIENT.crt
-                rm -rf /etc/openvpn/crl.pem
-                cp /etc/openvpn/easy-rsa/pki/crl.pem /etc/openvpn/crl.pem
-                chmod 644 /etc/openvpn/crl.pem
-                echo ""
-                echo "Certificate for client $CLIENT revoked"
-                echo "Exiting..."
-                exit
-                ;;
-            3)
-                echo ""
-                read -p "Do you really want to remove OpenVPN? [y/n]: " -e -i n REMOVE
-                if [[ "$REMOVE" = 'y' ]]; then
-                    PORT=$(grep '^port ' /etc/openvpn/server.conf | cut -d " " -f 2)
-                    if pgrep firewalld; then
-                        # Using both permanent and not permanent rules to avoid a firewalld reload.
-                        firewall-cmd --zone=public --remove-port=$PORT/udp
-                        firewall-cmd --zone=trusted --remove-source=10.8.0.0/24
-                        firewall-cmd --permanent --zone=public --remove-port=$PORT/udp
-                        firewall-cmd --permanent --zone=trusted --remove-source=10.8.0.0/24
-                    fi
-                    if iptables -L -n | grep -qE 'REJECT|DROP'; then
-                        if [[ "$PROTOCOL" = 'udp' ]]; then
-                            iptables -D INPUT -p udp --dport $PORT -j ACCEPT
-                        else
-                            iptables -D INPUT -p tcp --dport $PORT -j ACCEPT
-                        fi
-                        iptables -D FORWARD -s 10.8.0.0/24 -j ACCEPT
-                        iptables-save > $IPTABLES
-                    fi
-                    iptables -t nat -D POSTROUTING -o $NIC -s 10.8.0.0/24 -j MASQUERADE
-                    iptables-save > $IPTABLES
-                    if hash sestatus 2>/dev/null; then
-                        if sestatus | grep "Current mode" | grep -qs "enforcing"; then
-                            if [[ "$PORT" != '1194' ]]; then
-                                semanage port -d -t openvpn_port_t -p udp $PORT
-                            fi
-                        fi
-                    fi
-                    if [[ "$OS" = 'debian' ]]; then
-                        apt-get autoremove --purge -y openvpn
-                    elif [[ "$OS" = 'arch' ]]; then
-                        pacman -R openvpn --noconfirm
-                    else
-                        yum remove openvpn -y
-                    fi
-                    rm -rf /etc/openvpn
-                    rm -rf /usr/share/doc/openvpn*
-                    echo ""
-                    echo "OpenVPN removed!"
-                else
-                    echo ""
-                    echo "Removal aborted!"
-                fi
-                exit
-                ;;
-            4) exit ;;
-        esac
-    done
+	while :
+	do
+	clear
+		echo "OpenVPN-install (github.com/Angristan/OpenVPN-install)"
+		echo ""
+		echo "Looks like OpenVPN is already installed"
+		echo ""
+		echo "What do you want to do?"
+		echo "   1) Add a cert for a new user"
+		echo "   2) Revoke existing user cert"
+		echo "   3) Remove OpenVPN"
+		echo "   4) Exit"
+		read -p "Select an option [1-4]: " option
+		case $option in
+			1)
+			echo ""
+			echo "Tell me a name for the client cert"
+			echo "Please, use one word only, no special characters"
+			read -p "Client name: " -e -i client CLIENT
+			cd /etc/openvpn/easy-rsa/
+			./easyrsa build-client-full $CLIENT nopass
+			# Generates the custom client.ovpn
+			newclient "$CLIENT"
+			echo ""
+			echo "Client $CLIENT added, certs available at $homeDir/$CLIENT.ovpn"
+			exit
+			;;
+			2)
+			NUMBEROFCLIENTS=$(tail -n +2 /etc/openvpn/easy-rsa/pki/index.txt | grep -c "^V")
+			if [[ "$NUMBEROFCLIENTS" = '0' ]]; then
+				echo ""
+				echo "You have no existing clients!"
+				exit 5
+			fi
+			echo ""
+			echo "Select the existing client certificate you want to revoke"
+			tail -n +2 /etc/openvpn/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | nl -s ') '
+			if [[ "$NUMBEROFCLIENTS" = '1' ]]; then
+				read -p "Select one client [1]: " CLIENTNUMBER
+			else
+				read -p "Select one client [1-$NUMBEROFCLIENTS]: " CLIENTNUMBER
+			fi
+			CLIENT=$(tail -n +2 /etc/openvpn/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | sed -n "$CLIENTNUMBER"p)
+			cd /etc/openvpn/easy-rsa/
+			./easyrsa --batch revoke $CLIENT
+			EASYRSA_CRL_DAYS=3650 ./easyrsa gen-crl
+			rm -rf pki/reqs/$CLIENT.req
+			rm -rf pki/private/$CLIENT.key
+			rm -rf pki/issued/$CLIENT.crt
+			rm -rf /etc/openvpn/crl.pem
+			cp /etc/openvpn/easy-rsa/pki/crl.pem /etc/openvpn/crl.pem
+			chmod 644 /etc/openvpn/crl.pem
+			echo ""
+			echo "Certificate for client $CLIENT revoked"
+			echo "Exiting..."
+			exit
+			;;
+			3)
+			echo ""
+			read -p "Do you really want to remove OpenVPN? [y/n]: " -e -i n REMOVE
+			if [[ "$REMOVE" = 'y' ]]; then
+				PORT=$(grep '^port ' /etc/openvpn/server.conf | cut -d " " -f 2)
+				if pgrep firewalld; then
+					# Using both permanent and not permanent rules to avoid a firewalld reload.
+					firewall-cmd --zone=public --remove-port=$PORT/udp
+					firewall-cmd --zone=trusted --remove-source=10.8.0.0/24
+					firewall-cmd --permanent --zone=public --remove-port=$PORT/udp
+					firewall-cmd --permanent --zone=trusted --remove-source=10.8.0.0/24
+				fi
+				if iptables -L -n | grep -qE 'REJECT|DROP'; then
+					if [[ "$PROTOCOL" = 'udp' ]]; then
+						iptables -D INPUT -p udp --dport $PORT -j ACCEPT
+					else
+						iptables -D INPUT -p tcp --dport $PORT -j ACCEPT
+					fi
+					iptables -D FORWARD -s 10.8.0.0/24 -j ACCEPT
+					iptables-save > $IPTABLES
+				fi
+				iptables -t nat -D POSTROUTING -o $NIC -s 10.8.0.0/24 -j MASQUERADE
+				iptables-save > $IPTABLES
+				if hash sestatus 2>/dev/null; then
+					if sestatus | grep "Current mode" | grep -qs "enforcing"; then
+						if [[ "$PORT" != '1194' ]]; then
+							semanage port -d -t openvpn_port_t -p udp $PORT
+						fi
+					fi
+				fi
+				if [[ "$OS" = 'debian' ]]; then
+					apt-get autoremove --purge -y openvpn
+				elif [[ "$OS" = 'arch' ]]; then
+					pacman -R openvpn --noconfirm
+				else
+					yum remove openvpn -y
+				fi
+				rm -rf /etc/openvpn
+				rm -rf /usr/share/doc/openvpn*
+				echo ""
+				echo "OpenVPN removed!"
+			else
+				echo ""
+				echo "Removal aborted!"
+			fi
+			exit
+			;;
+			4) exit;;
+		esac
+	done
 else
-    clear
-    echo "Welcome to the secure OpenVPN installer (github.com/Angristan/OpenVPN-install)"
-    echo ""
-    # OpenVPN setup and first user creation
-    echo "I need to ask you a few questions before starting the setup"
-    echo "You can leave the default options and just press enter if you are ok with them"
-    echo ""
-    echo "I need to know the IPv4 address of the network interface you want OpenVPN listening to."
-    echo "If your server is running behind a NAT, (e.g. LowEndSpirit, Scaleway) leave the IP address as it is. (local/private IP)"
-    echo "Otherwise, it should be your public IPv4 address."
-    read -p "IP address: " -e -i $IP IP
-    echo ""
-    echo "What port do you want for OpenVPN?"
-    read -p "Port: " -e -i 1194 PORT
-    echo ""
-    echo "What protocol do you want for OpenVPN?"
-    echo "Unless UDP is blocked, you should not use TCP (unnecessarily slower)"
-    while [[ $PROTOCOL != "UDP" && $PROTOCOL != "TCP" ]]; do
-        read -p "Protocol [UDP/TCP]: " -e -i UDP PROTOCOL
-    done
-    echo ""
-    echo "What DNS do you want to use with the VPN?"
-    echo "   1) Current system resolvers (in /etc/resolv.conf)"
-    echo "   2) FDN (France)"
-    echo "   3) DNS.WATCH (Germany)"
-    echo "   4) OpenDNS (Anycast: worldwide)"
-    echo "   5) Google (Anycast: worldwide)"
-    echo "   6) Yandex Basic (Russia)"
-    echo "   7) AdGuard DNS (Russia)"
-    while [[ $DNS != "1" && $DNS != "2" && $DNS != "3" && $DNS != "4" && $DNS != "5" && $DNS != "6" && $DNS != "7" ]]; do
-        read -p "DNS [1-7]: " -e -i 1 DNS
-    done
-    echo ""
-    echo "See https://github.com/Angristan/OpenVPN-install#encryption to learn more about "
-    echo "the encryption in OpenVPN and the choices I made in this script."
-    echo "Please note that all the choices proposed are secure (to a different degree)"
-    echo "and are still viable to date, unlike some default OpenVPN options"
-    echo ''
-    echo "Choose which cipher you want to use for the data channel:"
-    echo "   1) AES-128-CBC (fastest and sufficiently secure for everyone, recommended)"
-    echo "   2) AES-192-CBC"
-    echo "   3) AES-256-CBC"
-    echo "Alternatives to AES, use them only if you know what you're doing."
-    echo "They are relatively slower but as secure as AES."
-    echo "   4) CAMELLIA-128-CBC"
-    echo "   5) CAMELLIA-192-CBC"
-    echo "   6) CAMELLIA-256-CBC"
-    echo "   7) SEED-CBC"
-    echo "   8) BF-CBC"
-    while [[ $CIPHER != "1" && $CIPHER != "2" && $CIPHER != "3" && $CIPHER != "4" && $CIPHER != "5" && $CIPHER != "6" && $CIPHER != "7" ]]; do
-        read -p "Cipher [1-8]: " -e -i 1 CIPHER
-    done
-    case $CIPHER in
-        1)
-            CIPHER="cipher AES-128-CBC"
-            ;;
-        2)
-            CIPHER="cipher AES-192-CBC"
-            ;;
-        3)
-            CIPHER="cipher AES-256-CBC"
-            ;;
-        4)
-            CIPHER="cipher CAMELLIA-128-CBC"
-            ;;
-        5)
-            CIPHER="cipher CAMELLIA-192-CBC"
-            ;;
-        6)
-            CIPHER="cipher CAMELLIA-256-CBC"
-            ;;
-        7)
-            CIPHER="cipher SEED-CBC"
-            ;;
-        8)  CIPHER="cipher BF-CBC"
-            ;;
-    esac
-    echo ""
-    echo "Choose what size of Diffie-Hellman key you want to use:"
-    echo "   1) 2048 bits (fastest)"
-    echo "   2) 3072 bits (recommended, best compromise)"
-    echo "   3) 4096 bits (most secure)"
-    while [[ $DH_KEY_SIZE != "1" && $DH_KEY_SIZE != "2" && $DH_KEY_SIZE != "3" ]]; do
-        read -p "DH key size [1-3]: " -e -i 2 DH_KEY_SIZE
-    done
-    case $DH_KEY_SIZE in
-        1)
-            DH_KEY_SIZE="2048"
-            ;;
-        2)
-            DH_KEY_SIZE="3072"
-            ;;
-        3)
-            DH_KEY_SIZE="4096"
-            ;;
-    esac
-    echo ""
-    echo "Choose what size of RSA key you want to use:"
-    echo "   1) 2048 bits (fastest)"
-    echo "   2) 3072 bits (recommended, best compromise)"
-    echo "   3) 4096 bits (most secure)"
-    while [[ $RSA_KEY_SIZE != "1" && $RSA_KEY_SIZE != "2" && $RSA_KEY_SIZE != "3" ]]; do
-        read -p "RSA key size [1-3]: " -e -i 2 RSA_KEY_SIZE
-    done
-    case $RSA_KEY_SIZE in
-        1)
-            RSA_KEY_SIZE="2048"
-            ;;
-        2)
-            RSA_KEY_SIZE="3072"
-            ;;
-        3)
-            RSA_KEY_SIZE="4096"
-            ;;
-    esac
-    echo ""
-    echo "Finally, tell me a name for the client certificate and configuration"
-    while [[ $CLIENT = "" ]]; do
-        echo "Please, use one word only, no special characters"
-        read -p "Client name: " -e -i client CLIENT
-    done
-    echo ""
-    echo "Okay, that was all I needed. We are ready to setup your OpenVPN server now"
-    read -n1 -r -p "Press any key to continue..."
+	clear
+	echo "Welcome to the secure OpenVPN installer (github.com/Angristan/OpenVPN-install)"
+	echo ""
+	# OpenVPN setup and first user creation
+	echo "I need to ask you a few questions before starting the setup"
+	echo "You can leave the default options and just press enter if you are ok with them"
+	echo ""
+	echo "I need to know the IPv4 address of the network interface you want OpenVPN listening to."
+	echo "If your server is running behind a NAT, (e.g. LowEndSpirit, Scaleway) leave the IP address as it is. (local/private IP)"
+	echo "Otherwise, it should be your public IPv4 address."
+	read -p "IP address: " -e -i $IP IP
+	echo ""
+	echo "What port do you want for OpenVPN?"
+	read -p "Port: " -e -i 1194 PORT
+	echo ""
+	echo "What protocol do you want for OpenVPN?"
+	echo "Unless UDP is blocked, you should not use TCP (unnecessarily slower)"
+	while [[ $PROTOCOL != "UDP" && $PROTOCOL != "TCP" ]]; do
+		read -p "Protocol [UDP/TCP]: " -e -i UDP PROTOCOL
+	done
+	echo ""
+	echo "What DNS do you want to use with the VPN?"
+	echo "   1) Current system resolvers (from /etc/resolv.conf)"
+	echo "   2) Quad9 (Anycast: worldwide)"
+	echo "   3) FDN (France)"
+	echo "   4) DNS.WATCH (Germany)"
+	echo "   5) OpenDNS (Anycast: worldwide)"
+	echo "   6) Google (Anycast: worldwide)"
+	echo "   7) Yandex Basic (Russia)"
+	echo "   8) AdGuard DNS (Russia)"
+	while [[ $DNS != "1" && $DNS != "2" && $DNS != "3" && $DNS != "4" && $DNS != "5" && $DNS != "6" && $DNS != "7" && $DNS != "8" ]]; do
+		read -p "DNS [1-8]: " -e -i 1 DNS
+	done
+	echo ""
+	echo "See https://github.com/Angristan/OpenVPN-install#encryption to learn more about "
+	echo "the encryption in OpenVPN and the choices I made in this script."
+	echo "Please note that all the choices proposed are secure (to a different degree)"
+	echo "and are still viable to date, unlike some default OpenVPN options"
+	echo ''
+	echo "Choose which cipher you want to use for the data channel:"
+	echo "   1) AES-128-CBC (fastest and sufficiently secure for everyone, recommended)"
+	echo "   2) AES-192-CBC"
+	echo "   3) AES-256-CBC"
+	echo "Alternatives to AES, use them only if you know what you're doing."
+	echo "They are relatively slower but as secure as AES."
+	echo "   4) CAMELLIA-128-CBC"
+	echo "   5) CAMELLIA-192-CBC"
+	echo "   6) CAMELLIA-256-CBC"
+	echo "   7) SEED-CBC"
+	while [[ $CIPHER != "1" && $CIPHER != "2" && $CIPHER != "3" && $CIPHER != "4" && $CIPHER != "5" && $CIPHER != "6" && $CIPHER != "7" ]]; do
+		read -p "Cipher [1-7]: " -e -i 1 CIPHER
+	done
+	case $CIPHER in
+		1)
+		CIPHER="cipher AES-128-CBC"
+		;;
+		2)
+		CIPHER="cipher AES-192-CBC"
+		;;
+		3)
+		CIPHER="cipher AES-256-CBC"
+		;;
+		4)
+		CIPHER="cipher CAMELLIA-128-CBC"
+		;;
+		5)
+		CIPHER="cipher CAMELLIA-192-CBC"
+		;;
+		6)
+		CIPHER="cipher CAMELLIA-256-CBC"
+		;;
+		7)
+		CIPHER="cipher SEED-CBC"
+		;;
+	esac
+	echo ""
+	echo "Choose what size of Diffie-Hellman key you want to use:"
+	echo "   1) 2048 bits (fastest)"
+	echo "   2) 3072 bits (recommended, best compromise)"
+	echo "   3) 4096 bits (most secure)"
+	while [[ $DH_KEY_SIZE != "1" && $DH_KEY_SIZE != "2" && $DH_KEY_SIZE != "3" ]]; do
+		read -p "DH key size [1-3]: " -e -i 2 DH_KEY_SIZE
+	done
+	case $DH_KEY_SIZE in
+		1)
+		DH_KEY_SIZE="2048"
+		;;
+		2)
+		DH_KEY_SIZE="3072"
+		;;
+		3)
+		DH_KEY_SIZE="4096"
+		;;
+	esac
+	echo ""
+	echo "Choose what size of RSA key you want to use:"
+	echo "   1) 2048 bits (fastest)"
+	echo "   2) 3072 bits (recommended, best compromise)"
+	echo "   3) 4096 bits (most secure)"
+	while [[ $RSA_KEY_SIZE != "1" && $RSA_KEY_SIZE != "2" && $RSA_KEY_SIZE != "3" ]]; do
+		read -p "RSA key size [1-3]: " -e -i 2 RSA_KEY_SIZE
+	done
+	case $RSA_KEY_SIZE in
+		1)
+		RSA_KEY_SIZE="2048"
+		;;
+		2)
+		RSA_KEY_SIZE="3072"
+		;;
+		3)
+		RSA_KEY_SIZE="4096"
+		;;
+	esac
+	echo ""
+	echo "Finally, tell me a name for the client certificate and configuration"
+	while [[ $CLIENT = "" ]]; do
+		echo "Please, use one word only, no special characters"
+		read -p "Client name: " -e -i client CLIENT
+	done
+	echo ""
+	echo "Okay, that was all I needed. We are ready to setup your OpenVPN server now"
+	read -n1 -r -p "Press any key to continue..."
 
-    if [[ "$OS" = 'debian' ]]; then
-        apt-get install ca-certificates -y
-        # We add the OpenVPN repo to get the latest version.
-        # Debian 7
-        if [[ "$VERSION_ID" = 'VERSION_ID="7"' ]]; then
-            echo "deb http://build.openvpn.net/debian/openvpn/stable wheezy main" > /etc/apt/sources.list.d/openvpn.list
-            wget -O - https://swupdate.openvpn.net/repos/repo-public.gpg | apt-key add -
-            apt-get update
-        fi
-        # Debian 8
-        if [[ "$VERSION_ID" = 'VERSION_ID="8"' ]]; then
-            echo "deb http://build.openvpn.net/debian/openvpn/stable jessie main" > /etc/apt/sources.list.d/openvpn.list
-            wget -O - https://swupdate.openvpn.net/repos/repo-public.gpg | apt-key add -
-            apt update
-        fi
-        # Ubuntu 12.04
-        if [[ "$VERSION_ID" = 'VERSION_ID="12.04"' ]]; then
-            echo "deb http://build.openvpn.net/debian/openvpn/stable precise main" > /etc/apt/sources.list.d/openvpn.list
-            wget -O - https://swupdate.openvpn.net/repos/repo-public.gpg | apt-key add -
-            apt-get update
-        fi
-        # Ubuntu 14.04
-        if [[ "$VERSION_ID" = 'VERSION_ID="14.04"' ]]; then
-            echo "deb http://build.openvpn.net/debian/openvpn/stable trusty main" > /etc/apt/sources.list.d/openvpn.list
-            wget -O - https://swupdate.openvpn.net/repos/repo-public.gpg | apt-key add -
-            apt-get update
-        fi
-        # Ubuntu >= 16.04 and Debian > 8 have OpenVPN > 2.3.3 without the need of a third party repository.
-        # The we install OpenVPN
-        apt-get install openvpn iptables openssl wget ca-certificates curl -y
-        # Install iptables service
-        if [[ ! -e /etc/systemd/system/iptables.service ]]; then
-            mkdir /etc/iptables
-            iptables-save > /etc/iptables/iptables.rules
-            echo "#!/bin/sh
+	if [[ "$OS" = 'debian' ]]; then
+		apt-get install ca-certificates -y
+		# We add the OpenVPN repo to get the latest version.
+		# Debian 7
+		if [[ "$VERSION_ID" = 'VERSION_ID="7"' ]]; then
+			echo "deb http://build.openvpn.net/debian/openvpn/stable wheezy main" > /etc/apt/sources.list.d/openvpn.list
+			wget -O - https://swupdate.openvpn.net/repos/repo-public.gpg | apt-key add -
+			apt-get update
+		fi
+		# Debian 8
+		if [[ "$VERSION_ID" = 'VERSION_ID="8"' ]]; then
+			echo "deb http://build.openvpn.net/debian/openvpn/stable jessie main" > /etc/apt/sources.list.d/openvpn.list
+			wget -O - https://swupdate.openvpn.net/repos/repo-public.gpg | apt-key add -
+			apt update
+		fi
+		# Ubuntu 12.04
+		if [[ "$VERSION_ID" = 'VERSION_ID="12.04"' ]]; then
+			echo "deb http://build.openvpn.net/debian/openvpn/stable precise main" > /etc/apt/sources.list.d/openvpn.list
+			wget -O - https://swupdate.openvpn.net/repos/repo-public.gpg | apt-key add -
+			apt-get update
+		fi
+		# Ubuntu 14.04
+		if [[ "$VERSION_ID" = 'VERSION_ID="14.04"' ]]; then
+			echo "deb http://build.openvpn.net/debian/openvpn/stable trusty main" > /etc/apt/sources.list.d/openvpn.list
+			wget -O - https://swupdate.openvpn.net/repos/repo-public.gpg | apt-key add -
+			apt-get update
+		fi
+		# Ubuntu >= 16.04 and Debian > 8 have OpenVPN > 2.3.3 without the need of a third party repository.
+		# The we install OpenVPN
+		apt-get install openvpn iptables openssl wget ca-certificates curl -y
+		# Install iptables service
+		if [[ ! -e /etc/systemd/system/iptables.service ]]; then
+			mkdir /etc/iptables
+			iptables-save > /etc/iptables/iptables.rules
+			echo "#!/bin/sh
 iptables -F
 iptables -X
 iptables -t nat -F
@@ -368,9 +364,9 @@ iptables -t mangle -F
 iptables -t mangle -X
 iptables -P INPUT ACCEPT
 iptables -P FORWARD ACCEPT
-            iptables -P OUTPUT ACCEPT" > /etc/iptables/flush-iptables.sh
-            chmod +x /etc/iptables/flush-iptables.sh
-            echo "[Unit]
+iptables -P OUTPUT ACCEPT" > /etc/iptables/flush-iptables.sh
+			chmod +x /etc/iptables/flush-iptables.sh
+			echo "[Unit]
 Description=Packet Filtering Framework
 DefaultDependencies=no
 Before=network-pre.target
@@ -382,18 +378,18 @@ ExecReload=/sbin/iptables-restore /etc/iptables/iptables.rules
 ExecStop=/etc/iptables/flush-iptables.sh
 RemainAfterExit=yes
 [Install]
-            WantedBy=multi-user.target" > /etc/systemd/system/iptables.service
-            systemctl daemon-reload
-            systemctl enable iptables.service
-        fi
-    elif [[ "$OS" = 'centos' ]]; then
-        yum install epel-release -y
-        yum install openvpn iptables openssl wget ca-certificates curl -y
-        # Install iptables service
-        if [[ ! -e /etc/systemd/system/iptables.service ]]; then
-            mkdir /etc/iptables
-            iptables-save > /etc/iptables/iptables.rules
-            echo "#!/bin/sh
+WantedBy=multi-user.target" > /etc/systemd/system/iptables.service
+			systemctl daemon-reload
+			systemctl enable iptables.service
+		fi
+	elif [[ "$OS" = 'centos' ]]; then
+		yum install epel-release -y
+		yum install openvpn iptables openssl wget ca-certificates curl -y
+		# Install iptables service
+		if [[ ! -e /etc/systemd/system/iptables.service ]]; then
+			mkdir /etc/iptables
+			iptables-save > /etc/iptables/iptables.rules
+			echo "#!/bin/sh
 iptables -F
 iptables -X
 iptables -t nat -F
@@ -402,9 +398,9 @@ iptables -t mangle -F
 iptables -t mangle -X
 iptables -P INPUT ACCEPT
 iptables -P FORWARD ACCEPT
-            iptables -P OUTPUT ACCEPT" > /etc/iptables/flush-iptables.sh
-            chmod +x /etc/iptables/flush-iptables.sh
-            echo "[Unit]
+iptables -P OUTPUT ACCEPT" > /etc/iptables/flush-iptables.sh
+			chmod +x /etc/iptables/flush-iptables.sh
+			echo "[Unit]
 Description=Packet Filtering Framework
 DefaultDependencies=no
 Before=network-pre.target
@@ -416,79 +412,79 @@ ExecReload=/sbin/iptables-restore /etc/iptables/iptables.rules
 ExecStop=/etc/iptables/flush-iptables.sh
 RemainAfterExit=yes
 [Install]
-            WantedBy=multi-user.target" > /etc/systemd/system/iptables.service
-            systemctl daemon-reload
-            systemctl enable iptables.service
-            # Disable firewalld to allow iptables to start upon reboot
-            systemctl disable firewalld
-        fi
-    else
-        # Else, the distro is ArchLinux
-        echo ""
-        echo ""
-        echo "As you're using ArchLinux, I need to update the packages on your system to install those I need."
-        echo "Not doing that could cause problems between dependencies, or missing files in repositories."
-        echo ""
-        echo "Continuing will update your installed packages and install needed ones."
-        while [[ $CONTINUE != "y" && $CONTINUE != "n" ]]; do
-            read -p "Continue ? [y/n]: " -e -i y CONTINUE
-        done
-        if [[ "$CONTINUE" = "n" ]]; then
-            echo "Ok, bye !"
-            exit 4
-        fi
+WantedBy=multi-user.target" > /etc/systemd/system/iptables.service
+			systemctl daemon-reload
+			systemctl enable iptables.service
+			# Disable firewalld to allow iptables to start upon reboot
+			systemctl disable firewalld
+		fi
+	else
+		# Else, the distro is ArchLinux
+		echo ""
+		echo ""
+		echo "As you're using ArchLinux, I need to update the packages on your system to install those I need."
+		echo "Not doing that could cause problems between dependencies, or missing files in repositories."
+		echo ""
+		echo "Continuing will update your installed packages and install needed ones."
+		while [[ $CONTINUE != "y" && $CONTINUE != "n" ]]; do
+			read -p "Continue ? [y/n]: " -e -i y CONTINUE
+		done
+		if [[ "$CONTINUE" = "n" ]]; then
+			echo "Ok, bye !"
+			exit 4
+		fi
 
-        if [[ "$OS" = 'arch' ]]; then
-            # Install dependencies
-            pacman -Syu openvpn iptables openssl wget ca-certificates curl --needed --noconfirm
-            iptables-save > /etc/iptables/iptables.rules # iptables won't start if this file does not exist
-            systemctl daemon-reload
-            systemctl enable iptables
-            systemctl start iptables
-        fi
-    fi
-    # Find out if the machine uses nogroup or nobody for the permissionless group
-    if grep -qs "^nogroup:" /etc/group; then
-        NOGROUP=nogroup
-    else
-        NOGROUP=nobody
-    fi
+		if [[ "$OS" = 'arch' ]]; then
+			# Install dependencies
+			pacman -Syu openvpn iptables openssl wget ca-certificates curl --needed --noconfirm
+			iptables-save > /etc/iptables/iptables.rules # iptables won't start if this file does not exist
+			systemctl daemon-reload
+			systemctl enable iptables
+			systemctl start iptables
+		fi
+	fi
+	# Find out if the machine uses nogroup or nobody for the permissionless group
+	if grep -qs "^nogroup:" /etc/group; then
+		NOGROUP=nogroup
+	else
+		NOGROUP=nobody
+	fi
 
-    # An old version of easy-rsa was available by default in some openvpn packages
-    if [[ -d /etc/openvpn/easy-rsa/ ]]; then
-        rm -rf /etc/openvpn/easy-rsa/
-    fi
-    # Get easy-rsa
-    wget -O ~/EasyRSA-3.0.3.tgz https://github.com/OpenVPN/easy-rsa/releases/download/v3.0.3/EasyRSA-3.0.3.tgz
-    tar xzf ~/EasyRSA-3.0.3.tgz -C ~/
-    mv ~/EasyRSA-3.0.3/ /etc/openvpn/
-    mv /etc/openvpn/EasyRSA-3.0.3/ /etc/openvpn/easy-rsa/
-    chown -R root:root /etc/openvpn/easy-rsa/
-    rm -rf ~/EasyRSA-3.0.3.tgz
-    cd /etc/openvpn/easy-rsa/
-    echo "set_var EASYRSA_KEY_SIZE $RSA_KEY_SIZE" > vars
-    # Create the PKI, set up the CA, the DH params and the server + client certificates
-    ./easyrsa init-pki
-    ./easyrsa --batch build-ca nopass
-    openssl dhparam -out dh.pem $DH_KEY_SIZE
-    ./easyrsa build-server-full server nopass
-    ./easyrsa build-client-full $CLIENT nopass
-    EASYRSA_CRL_DAYS=3650 ./easyrsa gen-crl
-    # generate tls-auth key
-    openvpn --genkey --secret /etc/openvpn/tls-auth.key
-    # Move all the generated files
-    cp pki/ca.crt pki/private/ca.key dh.pem pki/issued/server.crt pki/private/server.key /etc/openvpn/easy-rsa/pki/crl.pem /etc/openvpn
-    # Make cert revocation list readable for non-root
-    chmod 644 /etc/openvpn/crl.pem
+	# An old version of easy-rsa was available by default in some openvpn packages
+	if [[ -d /etc/openvpn/easy-rsa/ ]]; then
+		rm -rf /etc/openvpn/easy-rsa/
+	fi
+	# Get easy-rsa
+	wget -O ~/EasyRSA-3.0.3.tgz https://github.com/OpenVPN/easy-rsa/releases/download/v3.0.3/EasyRSA-3.0.3.tgz
+	tar xzf ~/EasyRSA-3.0.3.tgz -C ~/
+	mv ~/EasyRSA-3.0.3/ /etc/openvpn/
+	mv /etc/openvpn/EasyRSA-3.0.3/ /etc/openvpn/easy-rsa/
+	chown -R root:root /etc/openvpn/easy-rsa/
+	rm -rf ~/EasyRSA-3.0.3.tgz
+	cd /etc/openvpn/easy-rsa/
+	echo "set_var EASYRSA_KEY_SIZE $RSA_KEY_SIZE" > vars
+	# Create the PKI, set up the CA, the DH params and the server + client certificates
+	./easyrsa init-pki
+	./easyrsa --batch build-ca nopass
+	openssl dhparam -out dh.pem $DH_KEY_SIZE
+	./easyrsa build-server-full server nopass
+	./easyrsa build-client-full $CLIENT nopass
+	EASYRSA_CRL_DAYS=3650 ./easyrsa gen-crl
+	# generate tls-auth key
+	openvpn --genkey --secret /etc/openvpn/tls-auth.key
+	# Move all the generated files
+	cp pki/ca.crt pki/private/ca.key dh.pem pki/issued/server.crt pki/private/server.key /etc/openvpn/easy-rsa/pki/crl.pem /etc/openvpn
+	# Make cert revocation list readable for non-root
+	chmod 644 /etc/openvpn/crl.pem
 
-    # Generate server.conf
-    echo "port $PORT" > /etc/openvpn/server.conf
-    if [[ "$PROTOCOL" = 'UDP' ]]; then
-        echo "proto udp" >> /etc/openvpn/server.conf
-    elif [[ "$PROTOCOL" = 'TCP' ]]; then
-        echo "proto tcp" >> /etc/openvpn/server.conf
-    fi
-    echo "dev tun
+	# Generate server.conf
+	echo "port $PORT" > /etc/openvpn/server.conf
+	if [[ "$PROTOCOL" = 'UDP' ]]; then
+		echo "proto udp" >> /etc/openvpn/server.conf
+	elif [[ "$PROTOCOL" = 'TCP' ]]; then
+		echo "proto tcp" >> /etc/openvpn/server.conf
+	fi
+	echo "dev tun
 user nobody
 group $NOGROUP
 persist-key
@@ -496,43 +492,45 @@ persist-tun
 keepalive 10 120
 topology subnet
 server 10.8.0.0 255.255.255.0
-duplicate-cn
-push \"route 10.8.0.0 255.255.255.0\"" >> /etc/openvpn/server.conf
-    # DNS resolvers
-    case $DNS in
-        1)
-            # Obtain the resolvers from resolv.conf and use them for OpenVPN
-            grep -v '#' /etc/resolv.conf | grep 'nameserver' | grep -E -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | while read line; do
-                echo "push \"dhcp-option DNS $line\"" >> /etc/openvpn/server.conf
-            done
-            ;;
-        2) #FDN
-            echo 'push "dhcp-option DNS 80.67.169.12"' >> /etc/openvpn/server.conf
-            echo 'push "dhcp-option DNS 80.67.169.40"' >> /etc/openvpn/server.conf
-            ;;
-        3) #DNS.WATCH
-            echo 'push "dhcp-option DNS 84.200.69.80"' >> /etc/openvpn/server.conf
-            echo 'push "dhcp-option DNS 84.200.70.40"' >> /etc/openvpn/server.conf
-            ;;
-        4) #OpenDNS
-            echo 'push "dhcp-option DNS 208.67.222.222"' >> /etc/openvpn/server.conf
-            echo 'push "dhcp-option DNS 208.67.220.220"' >> /etc/openvpn/server.conf
-            ;;
-        5) #Google
-            echo 'push "dhcp-option DNS 8.8.8.8"' >> /etc/openvpn/server.conf
-            echo 'push "dhcp-option DNS 8.8.4.4"' >> /etc/openvpn/server.conf
-            ;;
-        6) #Yandex Basic
-            echo 'push "dhcp-option DNS 77.88.8.8"' >> /etc/openvpn/server.conf
-            echo 'push "dhcp-option DNS 77.88.8.1"' >> /etc/openvpn/server.conf
-            ;;
-        7) #AdGuard DNS
-            echo 'push "dhcp-option DNS 176.103.130.130"' >> /etc/openvpn/server.conf
-            echo 'push "dhcp-option DNS 176.103.130.131"' >> /etc/openvpn/server.conf
-            ;;
-    esac
-    echo 'push "redirect-gateway def1 bypass-dhcp" '>> /etc/openvpn/server.conf
-    echo "crl-verify crl.pem
+ifconfig-pool-persist ipp.txt" >> /etc/openvpn/server.conf
+	# DNS resolvers
+	case $DNS in
+		1)
+		# Obtain the resolvers from resolv.conf and use them for OpenVPN
+		grep -v '#' /etc/resolv.conf | grep 'nameserver' | grep -E -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | while read line; do
+			echo "push \"dhcp-option DNS $line\"" >> /etc/openvpn/server.conf
+		done
+		;;
+		2) #Quad9
+		echo 'push "dhcp-option DNS 9.9.9.9"' >> /etc/openvpn/server.conf
+		;;
+		3) #FDN
+		echo 'push "dhcp-option DNS 80.67.169.12"' >> /etc/openvpn/server.conf
+		echo 'push "dhcp-option DNS 80.67.169.40"' >> /etc/openvpn/server.conf
+		;;
+		4) #DNS.WATCH
+		echo 'push "dhcp-option DNS 84.200.69.80"' >> /etc/openvpn/server.conf
+		echo 'push "dhcp-option DNS 84.200.70.40"' >> /etc/openvpn/server.conf
+		;;
+		5) #OpenDNS
+		echo 'push "dhcp-option DNS 208.67.222.222"' >> /etc/openvpn/server.conf
+		echo 'push "dhcp-option DNS 208.67.220.220"' >> /etc/openvpn/server.conf
+		;;
+		6) #Google
+		echo 'push "dhcp-option DNS 8.8.8.8"' >> /etc/openvpn/server.conf
+		echo 'push "dhcp-option DNS 8.8.4.4"' >> /etc/openvpn/server.conf
+		;;
+		7) #Yandex Basic
+		echo 'push "dhcp-option DNS 77.88.8.8"' >> /etc/openvpn/server.conf
+		echo 'push "dhcp-option DNS 77.88.8.1"' >> /etc/openvpn/server.conf
+		;;
+		8) #AdGuard DNS
+		echo 'push "dhcp-option DNS 176.103.130.130"' >> /etc/openvpn/server.conf
+		echo 'push "dhcp-option DNS 176.103.130.131"' >> /etc/openvpn/server.conf
+		;;
+	esac
+echo 'push "redirect-gateway def1 bypass-dhcp" '>> /etc/openvpn/server.conf
+echo "crl-verify crl.pem
 ca ca.crt
 cert server.crt
 key server.key
@@ -540,134 +538,130 @@ tls-auth tls-auth.key 0
 dh dh.pem
 auth SHA256
 $CIPHER
-comp-lzo
 tls-server
 tls-version-min 1.2
 tls-cipher TLS-DHE-RSA-WITH-AES-128-GCM-SHA256
 status openvpn.log
 verb 3" >> /etc/openvpn/server.conf
 
-    # Create the sysctl configuration file if needed (mainly for Arch Linux)
-    if [[ ! -e $SYSCTL ]]; then
-        touch $SYSCTL
-    fi
+	# Create the sysctl configuration file if needed (mainly for Arch Linux)
+	if [[ ! -e $SYSCTL ]]; then
+		touch $SYSCTL
+	fi
 
-    # Enable net.ipv4.ip_forward for the system
-    sed -i '/\<net.ipv4.ip_forward\>/c\net.ipv4.ip_forward=1' $SYSCTL
-    if ! grep -q "\<net.ipv4.ip_forward\>" $SYSCTL; then
-        echo 'net.ipv4.ip_forward=1' >> $SYSCTL
-    fi
-    # Avoid an unneeded reboot
-    echo 1 > /proc/sys/net/ipv4/ip_forward
-    # Set NAT for the VPN subnet
-    iptables -t nat -A POSTROUTING -o $NIC -s 10.8.0.0/24 -j MASQUERADE
-    # Save persitent iptables rules
-    iptables-save > $IPTABLES
-    if pgrep firewalld; then
-        # We don't use --add-service=openvpn because that would only work with
-        # the default port. Using both permanent and not permanent rules to
-        # avoid a firewalld reload.
-        if [[ "$PROTOCOL" = 'UDP' ]]; then
-            firewall-cmd --zone=public --add-port=$PORT/udp
-            firewall-cmd --permanent --zone=public --add-port=$PORT/udp
-        elif [[ "$PROTOCOL" = 'TCP' ]]; then
-            firewall-cmd --zone=public --add-port=$PORT/tcp
-            firewall-cmd --permanent --zone=public --add-port=$PORT/tcp
-        fi
-        firewall-cmd --zone=trusted --add-source=10.8.0.0/24
-        firewall-cmd --permanent --zone=trusted --add-source=10.8.0.0/24
-    fi
-    if iptables -L -n | grep -qE 'REJECT|DROP'; then
-        # If iptables has at least one REJECT rule, we asume this is needed.
-        # Not the best approach but I can't think of other and this shouldn't
-        # cause problems.
-        if [[ "$PROTOCOL" = 'UDP' ]]; then
-            iptables -I INPUT -p udp --dport $PORT -j ACCEPT
-        elif [[ "$PROTOCOL" = 'TCP' ]]; then
-            iptables -I INPUT -p tcp --dport $PORT -j ACCEPT
-        fi
-        iptables -I FORWARD -s 10.8.0.0/24 -j ACCEPT
-        iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
-        # Save persitent OpenVPN rules
+	# Enable net.ipv4.ip_forward for the system
+	sed -i '/\<net.ipv4.ip_forward\>/c\net.ipv4.ip_forward=1' $SYSCTL
+	if ! grep -q "\<net.ipv4.ip_forward\>" $SYSCTL; then
+		echo 'net.ipv4.ip_forward=1' >> $SYSCTL
+	fi
+	# Avoid an unneeded reboot
+	echo 1 > /proc/sys/net/ipv4/ip_forward
+	# Set NAT for the VPN subnet
+	iptables -t nat -A POSTROUTING -o $NIC -s 10.8.0.0/24 -j MASQUERADE
+	# Save persitent iptables rules
+	iptables-save > $IPTABLES
+	if pgrep firewalld; then
+		# We don't use --add-service=openvpn because that would only work with
+		# the default port. Using both permanent and not permanent rules to
+		# avoid a firewalld reload.
+		if [[ "$PROTOCOL" = 'UDP' ]]; then
+			firewall-cmd --zone=public --add-port=$PORT/udp
+			firewall-cmd --permanent --zone=public --add-port=$PORT/udp
+		elif [[ "$PROTOCOL" = 'TCP' ]]; then
+			firewall-cmd --zone=public --add-port=$PORT/tcp
+			firewall-cmd --permanent --zone=public --add-port=$PORT/tcp
+		fi
+		firewall-cmd --zone=trusted --add-source=10.8.0.0/24
+		firewall-cmd --permanent --zone=trusted --add-source=10.8.0.0/24
+	fi
+	if iptables -L -n | grep -qE 'REJECT|DROP'; then
+		# If iptables has at least one REJECT rule, we asume this is needed.
+		# Not the best approach but I can't think of other and this shouldn't
+		# cause problems.
+		if [[ "$PROTOCOL" = 'UDP' ]]; then
+			iptables -I INPUT -p udp --dport $PORT -j ACCEPT
+		elif [[ "$PROTOCOL" = 'TCP' ]]; then
+			iptables -I INPUT -p tcp --dport $PORT -j ACCEPT
+		fi
+		iptables -I FORWARD -s 10.8.0.0/24 -j ACCEPT
+		iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
+		# Save persitent OpenVPN rules
         iptables-save > $IPTABLES
-    fi
-    # If SELinux is enabled and a custom port was selected, we need this
-    if hash sestatus 2>/dev/null; then
-        if sestatus | grep "Current mode" | grep -qs "enforcing"; then
-            if [[ "$PORT" != '1194' ]]; then
-                # semanage isn't available in CentOS 6 by default
-                if ! hash semanage 2>/dev/null; then
-                    yum install policycoreutils-python -y
-                fi
-                if [[ "$PROTOCOL" = 'UDP' ]]; then
-                    semanage port -a -t openvpn_port_t -p udp $PORT
-                elif [[ "$PROTOCOL" = 'TCP' ]]; then
-                    semanage port -a -t openvpn_port_t -p tcp $PORT
-                fi
-            fi
-        fi
-    fi
-    # And finally, restart OpenVPN
-    if [[ "$OS" = 'debian' ]]; then
-        # Little hack to check for systemd
-        if pgrep systemd-journal; then
-            if [[ "$VERSION_ID" = 'VERSION_ID="9"' ]]; then
-                #Workaround to fix OpenVPN service on Debian 9 OpenVZ
-                sed -i 's|LimitNPROC|#LimitNPROC|' /lib/systemd/system/openvpn-server\@.service
-                sed -i 's|/etc/openvpn/server|/etc/openvpn|' /lib/systemd/system/openvpn-server\@.service
-                sed -i 's|%i.conf|server.conf|' /lib/systemd/system/openvpn-server\@.service
-                systemctl daemon-reload
-                systemctl restart openvpn-server@openvpn.service
-                systemctl enable openvpn-server@openvpn.service
-            else
-                sed -i 's|LimitNPROC|#LimitNPROC|' /lib/systemd/system/openvpn\@.service
-                systemctl daemon-reload
-                systemctl restart openvpn@server.service
-            fi
-        else
-            /etc/init.d/openvpn restart
-        fi
-    else
-        if pgrep systemd-journal; then
-            if [[ "$OS" = 'arch' ]] || [[ "$VERSION_ID" = 'VERSION_ID="16.04"' ]]; then
-                #Workaround to avoid rewriting the entire script for Arch
-                sed -i 's|LimitNPROC|#LimitNPROC|' /usr/lib/systemd/system/openvpn-server\@.service
-                sed -i 's|/etc/openvpn/server|/etc/openvpn|' /usr/lib/systemd/system/openvpn-server\@.service
-                sed -i 's|%i.conf|server.conf|' /usr/lib/systemd/system/openvpn-server\@.service
-                systemctl daemon-reload
-                systemctl restart openvpn-server@openvpn.service
-                systemctl enable openvpn-server@openvpn.service
-            else
-                systemctl restart openvpn@server.service
-                systemctl enable openvpn@server.service
-            fi
-        else
-            service openvpn restart
-            chkconfig openvpn on
-        fi
-    fi
-    # Try to detect a NATed connection and ask about it to potential LowEndSpirit/Scaleway users
-    EXTERNALIP=$(wget -qO- ipv4.icanhazip.com)
-    if [[ "$IP" != "$EXTERNALIP" ]]; then
-        echo ""
-        echo "Looks like your server is behind a NAT!"
-        echo ""
+	fi
+	# If SELinux is enabled and a custom port was selected, we need this
+	if hash sestatus 2>/dev/null; then
+		if sestatus | grep "Current mode" | grep -qs "enforcing"; then
+			if [[ "$PORT" != '1194' ]]; then
+				# semanage isn't available in CentOS 6 by default
+				if ! hash semanage 2>/dev/null; then
+					yum install policycoreutils-python -y
+				fi
+				if [[ "$PROTOCOL" = 'UDP' ]]; then
+					semanage port -a -t openvpn_port_t -p udp $PORT
+				elif [[ "$PROTOCOL" = 'TCP' ]]; then
+					semanage port -a -t openvpn_port_t -p tcp $PORT
+				fi
+			fi
+		fi
+	fi
+	# And finally, restart OpenVPN
+	if [[ "$OS" = 'debian' ]]; then
+		# Little hack to check for systemd
+		if pgrep systemd-journal; then
+			if [[ "$VERSION_ID" = 'VERSION_ID="9"' ]]; then
+				#Workaround to fix OpenVPN service on Debian 9 OpenVZ
+				sed -i 's|LimitNPROC|#LimitNPROC|' /lib/systemd/system/openvpn-server\@.service
+				sed -i 's|/etc/openvpn/server|/etc/openvpn|' /lib/systemd/system/openvpn-server\@.service
+				sed -i 's|%i.conf|server.conf|' /lib/systemd/system/openvpn-server\@.service
+				systemctl daemon-reload
+				systemctl restart openvpn-server@openvpn.service
+				systemctl enable openvpn-server@openvpn.service
+			else
+				systemctl restart openvpn@server.service
+			fi
+		else
+			/etc/init.d/openvpn restart
+		fi
+	else
+		if pgrep systemd-journal; then
+			if [[ "$OS" = 'arch' ]]; then
+				#Workaround to avoid rewriting the entire script for Arch
+				sed -i 's|/etc/openvpn/server|/etc/openvpn|' /usr/lib/systemd/system/openvpn-server@.service
+				sed -i 's|%i.conf|server.conf|' /usr/lib/systemd/system/openvpn-server@.service
+				systemctl daemon-reload
+				systemctl restart openvpn-server@openvpn.service
+				systemctl enable openvpn-server@openvpn.service
+			else
+				systemctl restart openvpn@server.service
+				systemctl enable openvpn@server.service
+			fi
+		else
+			service openvpn restart
+			chkconfig openvpn on
+		fi
+	fi
+	# Try to detect a NATed connection and ask about it to potential LowEndSpirit/Scaleway users
+	EXTERNALIP=$(wget -qO- ipv4.icanhazip.com)
+	if [[ "$IP" != "$EXTERNALIP" ]]; then
+		echo ""
+		echo "Looks like your server is behind a NAT!"
+		echo ""
         echo "If your server is NATed (e.g. LowEndSpirit, Scaleway, or behind a router),"
         echo "then I need to know the address that can be used to access it from outside."
         echo "If that's not the case, just ignore this and leave the next field blank"
         read -p "External IP or domain name: " -e USEREXTERNALIP
-        if [[ "$USEREXTERNALIP" != "" ]]; then
-            IP=$USEREXTERNALIP
-        fi
-    fi
-    # client-template.txt is created so we have a template to add further users later
-    echo "client" > /etc/openvpn/client-template.txt
-    if [[ "$PROTOCOL" = 'UDP' ]]; then
-        echo "proto udp" >> /etc/openvpn/client-template.txt
-    elif [[ "$PROTOCOL" = 'TCP' ]]; then
-        echo "proto tcp-client" >> /etc/openvpn/client-template.txt
-    fi
-    echo "remote $IP $PORT
+		if [[ "$USEREXTERNALIP" != "" ]]; then
+			IP=$USEREXTERNALIP
+		fi
+	fi
+	# client-template.txt is created so we have a template to add further users later
+	echo "client" > /etc/openvpn/client-template.txt
+	if [[ "$PROTOCOL" = 'UDP' ]]; then
+		echo "proto udp" >> /etc/openvpn/client-template.txt
+	elif [[ "$PROTOCOL" = 'TCP' ]]; then
+		echo "proto tcp-client" >> /etc/openvpn/client-template.txt
+	fi
+	echo "remote $IP $PORT
 dev tun
 resolv-retry infinite
 nobind
@@ -677,19 +671,18 @@ remote-cert-tls server
 auth SHA256
 auth-nocache
 $CIPHER
-comp-lzo
 tls-client
 tls-version-min 1.2
 tls-cipher TLS-DHE-RSA-WITH-AES-128-GCM-SHA256
 setenv opt block-outside-dns
 verb 3" >> /etc/openvpn/client-template.txt
 
-    # Generate the custom client.ovpn
-    newclient "$CLIENT"
-    echo ""
-    echo "Finished!"
-    echo ""
-    echo "Your client config is available at $homeDir/$CLIENT.ovpn"
-    echo "If you want to add more clients, you simply need to run this script another time!"
+	# Generate the custom client.ovpn
+	newclient "$CLIENT"
+	echo ""
+	echo "Finished!"
+	echo ""
+	echo "Your client config is available at $homeDir/$CLIENT.ovpn"
+	echo "If you want to add more clients, you simply need to run this script another time!"
 fi
 exit 0;