#!/usr/bin/env bash # PiVPN: Trivial OpenVPN setup and configuration # Easiest setup and mangement of OpenVPN on Raspberry Pi # http://pivpn.io # Heavily adapted from the pi-hole.net project and... # https://github.com/StarshipEngineer/OpenVPN-Setup/ # # Install with this command (from your Pi): # # curl -L https://install.pivpn.io | bash # Make sure you have `curl` installed ######## VARIABLES ######### pivpnGitUrl="https://github.com/pivpn/pivpn.git" pivpnFilesDir="/etc/.pivpn" easyrsaVer="3.0.1-pivpn1" easyrsaRel="https://github.com/pivpn/easy-rsa/releases/download/${easyrsaVer}/EasyRSA-${easyrsaVer}.tgz" # Find the rows and columns. Will default to 80x24 if it can not be detected. screen_size=$(stty size 2>/dev/null || echo 24 80) rows=$(echo $screen_size | awk '{print $1}') columns=$(echo $screen_size | awk '{print $2}') # Divide by two so the dialogs take up half of the screen, which looks nice. r=$(( rows / 2 )) c=$(( columns / 2 )) # Unless the screen is tiny r=$(( r < 20 ? 20 : r )) c=$(( c < 70 ? 70 : c )) # Find IP used to route to outside world IPv4dev=$(ip route get 8.8.8.8 | awk '{for(i=1;i<=NF;i++)if($i~/dev/)print $(i+1)}') IPv4addr=$(ip -o -f inet addr show dev "$IPv4dev" | awk '{print $4}' | awk 'END {print}') IPv4gw=$(ip route get 8.8.8.8 | awk '{print $3}') availableInterfaces=$(ip -o link | awk '{print $2}' | grep -v "lo" | cut -d':' -f1 | cut -d'@' -f1) dhcpcdFile=/etc/dhcpcd.conf ######## FIRST CHECK ######## # Must be root to install echo ":::" if [[ $EUID -eq 0 ]];then echo "::: You are root." else echo "::: sudo will be used for the install." # Check if it is actually installed # If it isn't, exit because the install cannot complete if [[ $(dpkg-query -s sudo) ]];then export SUDO="sudo" export SUDOE="sudo -E" else echo "::: Please install sudo or run this as root." exit 1 fi fi # Next see if we are on a tested and supported OS function noOS_Support() { whiptail --msgbox --backtitle "INVALID OS DETECTED" --title "Invalid OS" "We have not been able to detect a supported OS. Currently this installer supports Raspbian jessie, Ubuntu 14.04 (trusty), and Ubuntu 16.04 (xenial). If you think you received this message in error, you can post an issue on the GitHub at https://github.com/pivpn/pivpn/issues." ${r} ${c} exit 1 } function maybeOS_Support() { if (whiptail --backtitle "Not Supported OS" --title "Not Supported OS" --yesno "You are on an OS that we have not tested but MAY work. Currently this installer supports Raspbian jessie, Ubuntu 14.04 (trusty), and Ubuntu 16.04 (xenial). Would you like to continue anyway?" ${r} ${c}) then echo "::: Did not detect perfectly supported OS but," echo "::: Continuing installation at user's own risk..." else echo "::: Exiting due to unsupported OS" exit 1 fi } # if lsb_release command is on their system if hash lsb_release 2>/dev/null; then PLAT=$(lsb_release -si) OSCN=$(lsb_release -sc) # We want this to be trusty xenial or jessie if [[ $PLAT == "Ubuntu" || $PLAT == "Raspbian" || $PLAT == "Debian" ]]; then if [[ $OSCN != "trusty" && $OSCN != "xenial" && $OSCN != "jessie" ]]; then maybeOS_Support fi else noOS_Support fi # else get info from os-release elif grep -q debian /etc/os-release; then if grep -q jessie /etc/os-release; then PLAT="Raspbian" OSCN="jessie" else PLAT="Ubuntu" OSCN="unknown" maybeOS_Support fi # else we prob don't want to install else noOS_Support fi echo "${PLAT}" > /tmp/DET_PLATFORM ####### FUNCTIONS ########## spinner() { local pid=$1 local delay=0.50 local spinstr='/-\|' while [ "$(ps a | awk '{print $1}' | grep "${pid}")" ]; do local temp=${spinstr#?} printf " [%c] " "${spinstr}" local spinstr=${temp}${spinstr%"$temp"} sleep ${delay} printf "\b\b\b\b\b\b" done printf " \b\b\b\b" } welcomeDialogs() { # Display the welcome dialog whiptail --msgbox --backtitle "Welcome" --title "PiVPN Automated Installer" "This installer will transform your Raspberry Pi into an OpenVPN server!" ${r} ${c} # Explain the need for a static address whiptail --msgbox --backtitle "Initiating network interface" --title "Static IP Needed" "The PiVPN is a SERVER so it needs a STATIC IP ADDRESS to function properly. In the next section, you can choose to use your current network settings (DHCP) or to manually edit them." ${r} ${c} } chooseUser() { # Explain the local user whiptail --msgbox --backtitle "Parsing User List" --title "Local Users" "Choose a local user that will hold your ovpn configurations." ${r} ${c} # First, let's check if there is a user available. numUsers=$(awk -F':' 'BEGIN {count=0} $3>=500 && $3<=60000 { count++ } END{ print count }' /etc/passwd) if [ "$numUsers" -eq 0 ] then # We don't have a user, let's ask to add one. if userToAdd=$(whiptail --title "Choose A User" --inputbox "No non-root user account was found. Please type a new username." ${r} ${c} 3>&1 1>&2 2>&3) then # See http://askubuntu.com/a/667842/459815 PASSWORD=$(whiptail --title "password dialog" --passwordbox "Please enter the new user password" ${r} ${c} 3>&1 1>&2 2>&3) CRYPT=$(perl -e 'printf("%s\n", crypt($ARGV[0], "password"))' "${PASSWORD}") $SUDO useradd -m -p "${CRYPT}" -s /bin/bash "${userToAdd}" if [[ $? = 0 ]]; then echo "Succeeded" ((numUsers+=1)) else exit 1 fi else exit 1 fi fi availableUsers=$(awk -F':' '$3>=500 && $3<=60000 {print $1}' /etc/passwd) local userArray=() local firstloop=1 while read -r line do mode="OFF" if [[ $firstloop -eq 1 ]]; then firstloop=0 mode="ON" fi userArray+=("${line}" "" "${mode}") done <<< "${availableUsers}" chooseUserCmd=(whiptail --title "Choose A User" --separate-output --radiolist "Choose:" ${r} ${c} ${numUsers}) chooseUserOptions=$("${chooseUserCmd[@]}" "${userArray[@]}" 2>&1 >/dev/tty) if [[ $? = 0 ]]; then for desiredUser in ${chooseUserOptions}; do pivpnUser=${desiredUser} echo "::: Using User: $pivpnUser" echo "${pivpnUser}" > /tmp/pivpnUSR done else echo "::: Cancel selected, exiting...." exit 1 fi } verifyFreeDiskSpace() { # If user installs unattended-upgrades we'd need about 60MB so will check for 75MB free echo "::: Verifying free disk space..." local required_free_kilobytes=76800 local existing_free_kilobytes=$(df -Pk | grep -m1 '\/$' | awk '{print $4}') # - Unknown free disk space , not a integer if ! [[ "${existing_free_kilobytes}" =~ ^([0-9])+$ ]]; then echo "::: Unknown free disk space!" echo "::: We were unable to determine available free disk space on this system." echo "::: You may continue with the installation, however, it is not recommended." read -r -p "::: If you are sure you want to continue, type YES and press enter :: " response case $response in [Y][E][S]) ;; *) echo "::: Confirmation not received, exiting..." exit 1 ;; esac # - Insufficient free disk space elif [[ ${existing_free_kilobytes} -lt ${required_free_kilobytes} ]]; then echo "::: Insufficient Disk Space!" echo "::: Your system appears to be low on disk space. PiVPN recommends a minimum of $required_free_kilobytes KiloBytes." echo "::: You only have ${existing_free_kilobytes} KiloBytes free." echo "::: If this is a new install on a Raspberry Pi you may need to expand your disk." echo "::: Try running 'sudo raspi-config', and choose the 'expand file system option'" echo "::: After rebooting, run this installation again. (curl -L https://install.pivpn.io | bash)" echo "Insufficient free space, exiting..." exit 1 fi } chooseInterface() { # Turn the available interfaces into an array so it can be used with a whiptail dialog local interfacesArray=() # Number of available interfaces local interfaceCount # Whiptail variable storage local chooseInterfaceCmd # Temporary Whiptail options storage local chooseInterfaceOptions # Loop sentinel variable local firstLoop=1 while read -r line; do mode="OFF" if [[ ${firstloop} -eq 1 ]]; then firstloop=0 mode="ON" fi interfacesArray+=("${line}" "available" "${mode}") done <<< "${availableInterfaces}" # Find out how many interfaces are available to choose from interfaceCount=$(echo "${availableInterfaces}" | wc -l) chooseInterfaceCmd=(whiptail --separate-output --radiolist "Choose An Interface (press space to select)" ${r} ${c} ${interfaceCount}) chooseInterfaceOptions=$("${chooseInterfaceCmd[@]}" "${interfacesArray[@]}" 2>&1 >/dev/tty) if [[ $? = 0 ]]; then for desiredInterface in ${chooseInterfaceOptions}; do pivpnInterface=${desiredInterface} echo "::: Using interface: $pivpnInterface" echo "${pivpnInterface}" > /tmp/pivpnINT done else echo "::: Cancel selected, exiting...." exit 1 fi } avoidStaticIPv4Ubuntu() { # If we are in Ubuntu then they need to have previously set their network, so just use what you have. whiptail --msgbox --backtitle "IP Information" --title "IP Information" "Since we think you are not using Raspbian, we will not configure a static IP for you. If you are in Amazon then you can not configure a static IP anyway. Just ensure before this installer started you had set an elastic IP on your instance." ${r} ${c} } getStaticIPv4Settings() { # Grab their current DNS Server IPv4dns=$(nslookup 127.0.0.1 | grep Server: | awk '{print $2}') # Ask if the user wants to use DHCP settings as their static IP if (whiptail --backtitle "Calibrating network interface" --title "Static IP Address" --yesno "Do you want to use your current network settings as a static address? IP address: ${IPv4addr} Gateway: ${IPv4gw}" ${r} ${c}); then # If they choose yes, let the user know that the IP address will not be available via DHCP and may cause a conflict. whiptail --msgbox --backtitle "IP information" --title "FYI: IP Conflict" "It is possible your router could still try to assign this IP to a device, which would cause a conflict. But in most cases the router is smart enough to not do that. If you are worried, either manually set the address, or modify the DHCP reservation pool so it does not include the IP you want. It is also possible to use a DHCP reservation, but if you are going to do that, you might as well set a static address." ${r} ${c} # Nothing else to do since the variables are already set above else # Otherwise, we need to ask the user to input their desired settings. # Start by getting the IPv4 address (pre-filling it with info gathered from DHCP) # Start a loop to let the user enter their information with the chance to go back and edit it if necessary until [[ ${ipSettingsCorrect} = True ]]; do # Ask for the IPv4 address IPv4addr=$(whiptail --backtitle "Calibrating network interface" --title "IPv4 address" --inputbox "Enter your desired IPv4 address" ${r} ${c} "${IPv4addr}" 3>&1 1>&2 2>&3) if [[ $? = 0 ]]; then echo "::: Your static IPv4 address: ${IPv4addr}" # Ask for the gateway IPv4gw=$(whiptail --backtitle "Calibrating network interface" --title "IPv4 gateway (router)" --inputbox "Enter your desired IPv4 default gateway" ${r} ${c} "${IPv4gw}" 3>&1 1>&2 2>&3) if [[ $? = 0 ]]; then echo "::: Your static IPv4 gateway: ${IPv4gw}" # Give the user a chance to review their settings before moving on if (whiptail --backtitle "Calibrating network interface" --title "Static IP Address" --yesno "Are these settings correct? IP address: ${IPv4addr} Gateway: ${IPv4gw}" ${r} ${c}); then # If the settings are correct, then we need to set the pivpnIP echo "${IPv4addr%/*}" > /tmp/pivpnIP echo "$pivpnInterface" > /tmp/pivpnINT # After that's done, the loop ends and we move on ipSettingsCorrect=True else # If the settings are wrong, the loop continues ipSettingsCorrect=False fi else # Cancelling gateway settings window ipSettingsCorrect=False echo "::: Cancel selected. Exiting..." exit 1 fi else # Cancelling IPv4 settings window ipSettingsCorrect=False echo "::: Cancel selected. Exiting..." exit 1 fi done # End the if statement for DHCP vs. static fi } setDHCPCD() { # Append these lines to dhcpcd.conf to enable a static IP echo "interface ${pivpnInterface} static ip_address=${IPv4addr} static routers=${IPv4gw} static domain_name_servers=${IPv4dns}" | $SUDO tee -a ${dhcpcdFile} >/dev/null } setStaticIPv4() { # Tries to set the IPv4 address if [[ -f /etc/dhcpcd.conf ]]; then if grep -q "${IPv4addr}" ${dhcpcdFile}; then echo "::: Static IP already configured." : else setDHCPCD $SUDO ip addr replace dev "${pivpnInterface}" "${IPv4addr}" echo ":::" echo "::: Setting IP to ${IPv4addr}. You may need to restart after the install is complete." echo ":::" fi else echo "::: Critical: Unable to locate configuration file to set static IPv4 address!" exit 1 fi } setNetwork() { # Sets the Network IP and Mask correctly LOCALMASK=$(ifconfig "${pivpnInterface}" | awk '/Mask:/{ print $4;} ' | cut -c6-) LOCALIP=$(ifconfig "${pivpnInterface}" | grep -Eo 'inet (addr:)?([0-9]*\.){3}[0-9]*' | grep -Eo '([0-9]*\.){3}[0-9]*') IFS=. read -r i1 i2 i3 i4 <<< "$LOCALIP" IFS=. read -r m1 m2 m3 m4 <<< "$LOCALMASK" LOCALNET=$(printf "%d.%d.%d.%d\n" "$((i1 & m1))" "$((i2 & m2))" "$((i3 & m3))" "$((i4 & m4))") } function valid_ip() { local ip=$1 local stat=1 if [[ $ip =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then OIFS=$IFS IFS='.' ip=($ip) IFS=$OIFS [[ ${ip[0]} -le 255 && ${ip[1]} -le 255 \ && ${ip[2]} -le 255 && ${ip[3]} -le 255 ]] stat=$? fi return $stat } installScripts() { # Install the scripts from /etc/.pivpn to their various locations $SUDO echo ":::" $SUDO echo -n "::: Installing scripts to /opt/pivpn..." if [ ! -d /opt/pivpn ]; then $SUDO mkdir /opt/pivpn $SUDO chown "$pivpnUser":root /opt/pivpn $SUDO chmod u+srwx /opt/pivpn fi $SUDO cp /etc/.pivpn/scripts/makeOVPN.sh /opt/pivpn/makeOVPN.sh $SUDO cp /etc/.pivpn/scripts/clientStat.sh /opt/pivpn/clientStat.sh $SUDO cp /etc/.pivpn/scripts/listOVPN.sh /opt/pivpn/listOVPN.sh $SUDO cp /etc/.pivpn/scripts/removeOVPN.sh /opt/pivpn/removeOVPN.sh $SUDO cp /etc/.pivpn/scripts/uninstall.sh /opt/pivpn/uninstall.sh $SUDO cp /etc/.pivpn/scripts/pivpnDebug.sh /opt/pivpn/pivpnDebug.sh $SUDO chmod 0755 /opt/pivpn/{makeOVPN,clientStat,listOVPN,removeOVPN,uninstall,pivpnDebug}.sh $SUDO cp /etc/.pivpn/pivpn /usr/local/bin/pivpn $SUDO chmod 0755 /usr/local/bin/pivpn $SUDO cp /etc/.pivpn/scripts/bash-completion /etc/bash_completion.d/pivpn . /etc/bash_completion.d/pivpn $SUDO echo " done." } fixApt() { if [[ ${APTFAIL} == 1 ]]; then printf "\n::: There seem to be fatal apt errors. Try rebooting and running the install again.\n" exit 1 fi printf "\n::: Installation of some packages seems to have failed, attempting to fix...\n" $SUDO apt-get -qy update > /dev/null & spinner $! $SUDO apt-get -qy upgrade > /dev/null & spinner $! $SUDO dpkg --configure -a > /dev/null & spinner $! APTFAIL=1 checkForDependencies } unattendedUpgrades() { whiptail --msgbox --backtitle "Security Updates" --title "Unattended Upgrades" "Since this server will have at least one port open to the internet, it is recommended you enable unattended-upgrades.\nThis feature will check daily for security package updates only and apply them when necessary.\nIt will NOT automatically reboot the server so to fully apply some updates you should periodically reboot." ${r} ${c} if (whiptail --backtitle "Security Updates" --title "Unattended Upgrades" --yesno "Do you want to enable unattended upgrades of security patches to this server?" ${r} ${c}) then UNATTUPG="unattended-upgrades" $SUDO apt-get --yes --quiet --no-install-recommends install "$UNATTUPG" > /dev/null & spinner $! else UNATTUPG="" fi } stopServices() { # Stop openvpn $SUDO echo ":::" $SUDO echo -n "::: Stopping OpenVPN service..." if [[ $PLAT == "Ubuntu" || $PLAT == "Debian" ]]; then $SUDO service openvpn stop || true else $SUDO systemctl stop openvpn.service || true fi $SUDO echo " done." } checkForDependencies() { #Running apt-get update/upgrade with minimal output can cause some issues with #requiring user input (e.g password for phpmyadmin see #218) #We'll change the logic up here, to check to see if there are any updates available and # if so, advise the user to run apt-get update/upgrade at their own discretion #Check to see if apt-get update has already been run today # it needs to have been run at least once on new installs! timestamp=$(stat -c %Y /var/cache/apt/) timestampAsDate=$(date -d @"$timestamp" "+%b %e") today=$(date "+%b %e") if [[ $PLAT == "Ubuntu" || $PLAT == "Debian" ]]; then if [[ $OSCN == "trusty" || $OSCN == "jessie" || $OSCN == "wheezy" ]]; then wget -O - https://swupdate.openvpn.net/repos/repo-public.gpg| $SUDO apt-key add - echo "deb http://swupdate.openvpn.net/apt $OSCN main" | $SUDO tee /etc/apt/sources.list.d/swupdate.openvpn.net.list > /dev/null echo -n "::: Adding OpenVPN repo for $PLAT $OSCN ..." $SUDO apt-get -qq update & spinner $! echo " done!" fi fi if [ ! "$today" == "$timestampAsDate" ]; then #update package lists echo ":::" echo -n "::: apt-get update has not been run today. Running now..." $SUDO apt-get -qq update & spinner $! echo " done!" fi echo ":::" echo -n "::: Checking apt-get for upgraded packages...." updatesToInstall=$($SUDO apt-get -s -o Debug::NoLocking=true upgrade | grep -c ^Inst) echo " done!" echo ":::" if [[ $updatesToInstall -eq "0" ]]; then echo "::: Your pi is up to date! Continuing with PiVPN installation..." else echo "::: There are $updatesToInstall updates availible for your pi!" echo "::: We recommend you run 'sudo apt-get upgrade' after installing PiVPN! " echo ":::" fi echo ":::" echo "::: Checking dependencies:" dependencies=( openvpn git dhcpcd5 tar wget grep iptables-persistent dnsutils expect whiptail ) for i in "${dependencies[@]}"; do echo -n "::: Checking for $i..." if [ "$(dpkg-query -W -f='${Status}' "$i" 2>/dev/null | grep -c "ok installed")" -eq 0 ]; then echo -n " Not found! Installing...." #Supply answers to the questions so we don't prompt user if [[ $i = "iptables-persistent" ]]; then echo iptables-persistent iptables-persistent/autosave_v4 boolean true | $SUDO debconf-set-selections echo iptables-persistent iptables-persistent/autosave_v6 boolean false | $SUDO debconf-set-selections fi if [[ $i == "expect" ]] || [[ $i == "openvpn" ]]; then ($SUDO apt-get --yes --quiet --no-install-recommends install "$i" > /dev/null || echo "Installation Failed!" && fixApt) & spinner $! else ($SUDO apt-get --yes --quiet install "$i" > /dev/null || echo "Installation Failed!" && fixApt) & spinner $! fi echo " done!" else echo " already installed!" fi done } getGitFiles() { # Setup git repos for base files echo ":::" echo "::: Checking for existing base files..." if is_repo "${1}"; then update_repo "${1}" else make_repo "${1}" "${2}" fi } is_repo() { # If the directory does not have a .git folder it is not a repo echo -n "::: Checking $1 is a repo..." cd "${1}" &> /dev/null || return 1 $SUDO git status &> /dev/null && echo " OK!"; return 0 || echo " not found!"; return 1 } make_repo() { # Remove the non-repos interface and clone the interface echo -n "::: Cloning $2 into $1..." $SUDO rm -rf "${1}" $SUDO git clone -q "${2}" "${1}" > /dev/null & spinner $! if [ -z "${TESTING+x}" ]; then : else $SUDO git -C "${1}" checkout test fi echo " done!" } update_repo() { # Pull the latest commits echo -n "::: Updating repo in $1..." cd "${1}" || exit 1 $SUDO git stash -q > /dev/null & spinner $! $SUDO git pull -q > /dev/null & spinner $! if [ -z "${TESTING+x}" ]; then : else ${SUDOE} git checkout test fi echo " done!" } setCustomProto() { # Set the available protocols into an array so it can be used with a whiptail dialog if protocol=$(whiptail --title "Protocol" --radiolist \ "Choose a protocol. Please only choose TCP if you know why you need TCP." ${r} ${c} 2 \ "UDP" "" ON \ "TCP" "" OFF 3>&1 1>&2 2>&3) then # Convert option into lowercase (UDP->udp) pivpnProto="${protocol,,}" echo "::: Using protocol: $pivpnProto" echo "${pivpnProto}" > /tmp/pivpnPROTO else echo "::: Cancel selected, exiting...." exit 1 fi # write out the PROTO PROTO=$pivpnProto $SUDO cp /tmp/pivpnPROTO /etc/pivpn/INSTALL_PROTO } setCustomPort() { until [[ $PORTNumCorrect = True ]] do portInvalid="Invalid" PROTO=$(cat /etc/pivpn/INSTALL_PROTO) if [ "$PROTO" = "udp" ]; then DEFAULT_PORT=1194 else DEFAULT_PORT=443 fi if PORT=$(whiptail --title "Default OpenVPN Port" --inputbox "You can modify the default OpenVPN port. \nEnter a new value or hit 'Enter' to retain the default" ${r} ${c} $DEFAULT_PORT 3>&1 1>&2 2>&3) then if [[ "$PORT" =~ ^[0-9]+$ ]] && [ "$PORT" -ge 1 ] && [ "$PORT" -le 65535 ]; then : else PORT=$portInvalid fi else echo "::: Cancel selected, exiting...." exit 1 fi if [[ $PORT == "$portInvalid" ]]; then whiptail --msgbox --backtitle "Invalid Port" --title "Invalid Port" "You entered an invalid Port number.\n Please enter a number from 1 - 65535.\n If you are not sure, please just keep the default." ${r} ${c} PORTNumCorrect=False else if (whiptail --backtitle "Specify Custom Port" --title "Confirm Custom Port Number" --yesno "Are these settings correct?\n PORT: $PORT" ${r} ${c}) then PORTNumCorrect=True else # If the settings are wrong, the loop continues PORTNumCorrect=False fi fi done # write out the port echo ${PORT} > /tmp/INSTALL_PORT $SUDO cp /tmp/INSTALL_PORT /etc/pivpn/INSTALL_PORT } setClientDNS() { DNSChoseCmd=(whiptail --separate-output --radiolist "Select the DNS Provider for your VPN Clients. To use your own, select Custom." ${r} ${c} 6) DNSChooseOptions=(Google "" on OpenDNS "" off Level3 "" off DNS.WATCH "" off Norton "" off Custom "" off) if DNSchoices=$("${DNSChoseCmd[@]}" "${DNSChooseOptions[@]}" 2>&1 >/dev/tty) then case ${DNSchoices} in Google) echo "::: Using Google DNS servers." OVPNDNS1="8.8.8.8" OVPNDNS2="8.8.4.4" # These are already in the file ;; OpenDNS) echo "::: Using OpenDNS servers." OVPNDNS1="208.67.222.222" OVPNDNS2="208.67.220.220" $SUDO sed -i '0,/\(dhcp-option DNS \)/ s/\(dhcp-option DNS \).*/\1'${OVPNDNS1}'\"/' /etc/openvpn/server.conf $SUDO sed -i '0,/\(dhcp-option DNS \)/! s/\(dhcp-option DNS \).*/\1'${OVPNDNS2}'\"/' /etc/openvpn/server.conf ;; Level3) echo "::: Using Level3 servers." OVPNDNS1="209.244.0.3" OVPNDNS2="209.244.0.4" $SUDO sed -i '0,/\(dhcp-option DNS \)/ s/\(dhcp-option DNS \).*/\1'${OVPNDNS1}'\"/' /etc/openvpn/server.conf $SUDO sed -i '0,/\(dhcp-option DNS \)/! s/\(dhcp-option DNS \).*/\1'${OVPNDNS2}'\"/' /etc/openvpn/server.conf ;; DNS.WATCH) echo "::: Using DNS.WATCH servers." OVPNDNS1="82.200.69.80" OVPNDNS2="84.200.70.40" $SUDO sed -i '0,/\(dhcp-option DNS \)/ s/\(dhcp-option DNS \).*/\1'${OVPNDNS1}'\"/' /etc/openvpn/server.conf $SUDO sed -i '0,/\(dhcp-option DNS \)/! s/\(dhcp-option DNS \).*/\1'${OVPNDNS2}'\"/' /etc/openvpn/server.conf ;; Norton) echo "::: Using Norton ConnectSafe servers." OVPNDNS1="199.85.126.10" OVPNDNS2="199.85.127.10" $SUDO sed -i '0,/\(dhcp-option DNS \)/ s/\(dhcp-option DNS \).*/\1'${OVPNDNS1}'\"/' /etc/openvpn/server.conf $SUDO sed -i '0,/\(dhcp-option DNS \)/! s/\(dhcp-option DNS \).*/\1'${OVPNDNS2}'\"/' /etc/openvpn/server.conf ;; Custom) until [[ $DNSSettingsCorrect = True ]] do strInvalid="Invalid" if OVPNDNS=$(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} ${c} "" 3>&1 1>&2 2>&3) then OVPNDNS1=$(echo "$OVPNDNS" | sed 's/[, \t]\+/,/g' | awk -F, '{print$1}') OVPNDNS2=$(echo "$OVPNDNS" | sed 's/[, \t]\+/,/g' | awk -F, '{print$2}') if ! valid_ip "$OVPNDNS1" || [ ! "$OVPNDNS1" ]; then OVPNDNS1=$strInvalid fi if ! valid_ip "$OVPNDNS2" && [ "$OVPNDNS2" ]; then OVPNDNS2=$strInvalid fi else echo "::: Cancel selected, exiting...." exit 1 fi if [[ $OVPNDNS1 == "$strInvalid" ]] || [[ $OVPNDNS2 == "$strInvalid" ]]; then whiptail --msgbox --backtitle "Invalid IP" --title "Invalid IP" "One or both entered IP addresses were invalid. Please try again.\n\n DNS Server 1: $OVPNDNS1\n DNS Server 2: $OVPNDNS2" ${r} ${c} if [[ $OVPNDNS1 == "$strInvalid" ]]; then OVPNDNS1="" fi if [[ $OVPNDNS2 == "$strInvalid" ]]; then OVPNDNS2="" fi DNSSettingsCorrect=False else if (whiptail --backtitle "Specify Upstream DNS Provider(s)" --title "Upstream DNS Provider(s)" --yesno "Are these settings correct?\n DNS Server 1: $OVPNDNS1\n DNS Server 2: $OVPNDNS2" ${r} ${c}) then DNSSettingsCorrect=True $SUDO sed -i '0,/\(dhcp-option DNS \)/ s/\(dhcp-option DNS \).*/\1'${OVPNDNS1}'\"/' /etc/openvpn/server.conf if [ -z ${OVPNDNS2} ]; then $SUDO sed -i '/\(dhcp-option DNS \)/{n;N;d}' /etc/openvpn/server.conf else $SUDO sed -i '0,/\(dhcp-option DNS \)/! s/\(dhcp-option DNS \).*/\1'${OVPNDNS2}'\"/' /etc/openvpn/server.conf fi else # If the settings are wrong, the loop continues DNSSettingsCorrect=False fi fi done ;; esac else echo "::: Cancel selected. Exiting..." exit 1 fi } confOpenVPN() { # Ask user if want to modify default port SERVER_NAME="server" # Ask user for desired level of encryption ENCRYPT=$(whiptail --backtitle "Setup OpenVPN" --title "Encryption Strength" --radiolist \ "Choose your desired level of encryption:\n This is an encryption key that will be generated on your system. The larger the key, the more time this will take. For most applications it is recommended to use 2048 bit. If you are testing or just want to get through it quicker you can use 1024. If you are paranoid about ... things... then grab a cup of joe and pick 4096." ${r} ${c} 3 \ "2048" "Use 2048-bit encryption. Recommended level." ON \ "1024" "Use 1024-bit encryption. Test level." OFF \ "4096" "Use 4096-bit encryption. Paranoid level." OFF 3>&1 1>&2 2>&3) exitstatus=$? if [ $exitstatus != 0 ]; then echo "::: Cancel selected. Exiting..." exit 1 fi # If easy-rsa exists, remove it if [[ -d /etc/openvpn/easy-rsa/ ]]; then $SUDO rm -rf /etc/openvpn/easy-rsa/ fi # Get the PiVPN easy-rsa wget -q -O - "${easyrsaRel}" | $SUDO tar xz -C /etc/openvpn && $SUDO mv /etc/openvpn/EasyRSA-${easyrsaVer} /etc/openvpn/easy-rsa # fix ownership $SUDO chown -R root:root /etc/openvpn/easy-rsa $SUDO mkdir /etc/openvpn/easy-rsa/pki # Write out new vars file IFS= read -d '' String <<"EOF" if [ -z "$EASYRSA_CALLER" ]; then echo "Nope." >&2 return 1 fi set_var EASYRSA "/etc/openvpn/easy-rsa" set_var EASYRSA_PKI "$EASYRSA/pki" set_var EASYRSA_KEY_SIZE 2048 set_var EASYRSA_ALGO rsa set_var EASYRSA_CURVE secp384r1 EOF echo "${String}" | $SUDO tee /etc/openvpn/easy-rsa/vars >/dev/null # Edit the KEY_SIZE variable in the vars file to set user chosen key size cd /etc/openvpn/easy-rsa || exit $SUDO sed -i "s/\(KEY_SIZE\).*/\1 ${ENCRYPT}/" vars # Remove any previous keys ${SUDOE} ./easyrsa --batch init-pki # Build the certificate authority printf "::: Building CA...\n" ${SUDOE} ./easyrsa --batch build-ca nopass printf "\n::: CA Complete.\n" whiptail --msgbox --backtitle "Setup OpenVPN" --title "Server Information" "The server key, Diffie-Hellman key, and HMAC key will now be generated." ${r} ${c} # Build the server ${SUDOE} ./easyrsa build-server-full server nopass if ([ "$ENCRYPT" -ge "4096" ] && whiptail --backtitle "Setup OpenVPN" --title "Download Diffie-Hellman Parameters" --yesno --defaultno "Download Diffie-Hellman parameters from a public DH parameter generation service?\n\nGenerating DH parameters for a $ENCRYPT-bit key can take many hours on a Raspberry Pi. You can instead download DH parameters from \"2 Ton Digital\" that are generated at regular intervals as part of a public service. Downloaded DH parameters will be randomly selected from a pool of the last 128 generated.\nMore information about this service can be found here: https://2ton.com.au/dhtool/\n\nIf you're paranoid, choose 'No' and Diffie-Hellman parameters will be generated on your device." ${r} ${c}) then # Downloading parameters RANDOM_INDEX=$(( RANDOM % 128 )) ${SUDOE} curl "https://2ton.com.au/dhparam/${ENCRYPT}/${RANDOM_INDEX}" -o "/etc/openvpn/easy-rsa/pki/dh${ENCRYPT}.pem" else # Generate Diffie-Hellman key exchange ${SUDOE} ./easyrsa gen-dh ${SUDOE} mv pki/dh.pem pki/dh${ENCRYPT}.pem fi # Generate static HMAC key to defend against DDoS ${SUDOE} openvpn --genkey --secret pki/ta.key # Write config file for server using the template .txt file $SUDO cp /etc/.pivpn/server_config.txt /etc/openvpn/server.conf $SUDO sed -i "s/LOCALNET/${LOCALNET}/g" /etc/openvpn/server.conf $SUDO sed -i "s/LOCALMASK/${LOCALMASK}/g" /etc/openvpn/server.conf # Set the user encryption key size $SUDO sed -i "s/\(dh \/etc\/openvpn\/easy-rsa\/pki\/dh\).*/\1${ENCRYPT}.pem/" /etc/openvpn/server.conf # if they modified port put value in server.conf if [ $PORT != 1194 ]; then $SUDO sed -i "s/1194/${PORT}/g" /etc/openvpn/server.conf fi # if they modified protocol put value in server.conf if [ "$PROTO" != "udp" ]; then $SUDO sed -i "s/proto udp/proto tcp/g" /etc/openvpn/server.conf fi # write out server certs to conf file $SUDO sed -i "s/\(key \/etc\/openvpn\/easy-rsa\/pki\/private\/\).*/\1${SERVER_NAME}.key/" /etc/openvpn/server.conf $SUDO sed -i "s/\(cert \/etc\/openvpn\/easy-rsa\/pki\/issued\/\).*/\1${SERVER_NAME}.crt/" /etc/openvpn/server.conf } confUnattendedUpgrades() { if [[ $UNATTUPG == "unattended-upgrades" ]]; then if [[ $PLAT == "Ubuntu" ]]; then # Ubuntu 50unattended-upgrades should already just have security enabled # so we just need to configure the 10periodic file cat << EOT | $SUDO tee /etc/apt/apt.conf.d/10periodic >/dev/null APT::Periodic::Update-Package-Lists "1"; APT::Periodic::Download-Upgradeable-Packages "1"; APT::Periodic::AutocleanInterval "5"; APT::Periodic::Unattended-Upgrade "1"; EOT else $SUDO sed -i '/\(o=Raspbian,n=jessie\)/c\"o=Raspbian,n=jessie,l=Raspbian-Security";\' /etc/apt/apt.conf.d/50unattended-upgrades cat << EOT | $SUDO tee /etc/apt/apt.conf.d/02periodic >/dev/null APT::Periodic::Enable "1"; APT::Periodic::Update-Package-Lists "1"; APT::Periodic::Download-Upgradeable-Packages "1"; APT::Periodic::Unattended-Upgrade "1"; APT::Periodic::AutocleanInterval "7"; APT::Periodic::Verbose "0"; EOT fi fi } confNetwork() { # Enable forwarding of internet traffic $SUDO sed -i '/net.ipv4.ip_forward=1/s/^#//g' /etc/sysctl.conf $SUDO sysctl -p # if ufw enabled, configure that if hash ufw 2>/dev/null; then if $SUDO ufw status | grep -q inactive then noUFW=1 else echo "::: Detected UFW is enabled." echo "::: Adding UFW rules..." $SUDO cp /etc/.pivpn/ufw_add.txt /tmp/ufw_add.txt $SUDO sed -i 's/IPv4dev/'"$IPv4dev"'/' /tmp/ufw_add.txt $SUDO sed -i "s/\(DEFAULT_FORWARD_POLICY=\).*/\1\"ACCEPT\"/" /etc/default/ufw $SUDO sed -i -e '/delete these required/r /tmp/ufw_add.txt' -e//N /etc/ufw/before.rules $SUDO ufw allow "${PORT}/${PROTO}" $SUDO ufw allow from 10.8.0.0/24 $SUDO ufw reload echo "::: UFW configuration completed." fi else noUFW=1 fi # else configure iptables if [[ $noUFW -eq 1 ]]; then echo 1 > /tmp/noUFW $SUDO iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o "$IPv4dev" -j MASQUERADE if [[ $PLAT == "Ubuntu" || $PLAT == "Debian" ]]; then $SUDO iptables-save | $SUDO tee /etc/iptables/rules.v4 > /dev/null else $SUDO netfilter-persistent save fi else echo 0 > /tmp/noUFW fi $SUDO cp /tmp/noUFW /etc/pivpn/NO_UFW } confOVPN() { if ! IPv4pub=$(dig +short myip.opendns.com @resolver1.opendns.com) then echo "dig failed, now trying to curl eth0.me" if ! IPv4pub=$(curl eth0.me) then echo "eth0.me failed, please check your internet connection/DNS" exit $? fi fi $SUDO cp /tmp/pivpnUSR /etc/pivpn/INSTALL_USER $SUDO cp /tmp/DET_PLATFORM /etc/pivpn/DET_PLATFORM # Set status that no certs have been revoked echo 0 > /tmp/REVOKE_STATUS $SUDO cp /tmp/REVOKE_STATUS /etc/pivpn/REVOKE_STATUS METH=$(whiptail --title "Public IP or DNS" --radiolist "Will clients use a Public IP or DNS Name to connect to your server?" ${r} ${c} 2 \ "$IPv4pub" "Use this public IP" "ON" \ "DNS Entry" "Use a public DNS" "OFF" 3>&1 1>&2 2>&3) exitstatus=$? if [ $exitstatus != 0 ]; then echo "::: Cancel selected. Exiting..." exit 1 fi $SUDO cp /etc/.pivpn/Default.txt /etc/openvpn/easy-rsa/pki/Default.txt if [ "$METH" == "$IPv4pub" ]; then $SUDO sed -i 's/IPv4pub/'"$IPv4pub"'/' /etc/openvpn/easy-rsa/pki/Default.txt else until [[ $publicDNSCorrect = True ]] do PUBLICDNS=$(whiptail --title "PiVPN Setup" --inputbox "What is the public DNS name of this Server?" ${r} ${c} 3>&1 1>&2 2>&3) exitstatus=$? if [ $exitstatus != 0 ]; then echo "::: Cancel selected. Exiting..." exit 1 fi if (whiptail --backtitle "Confirm DNS Name" --title "Confirm DNS Name" --yesno "Is this correct?\n\n Public DNS Name: $PUBLICDNS" ${r} ${c}) then publicDNSCorrect=True $SUDO sed -i 's/IPv4pub/'"$PUBLICDNS"'/' /etc/openvpn/easy-rsa/pki/Default.txt else publicDNSCorrect=False fi done fi # if they modified port put value in Default.txt for clients to use if [ $PORT != 1194 ]; then $SUDO sed -i -e "s/1194/${PORT}/g" /etc/openvpn/easy-rsa/pki/Default.txt fi # if they modified protocol put value in Default.txt for clients to use if [ "$PROTO" != "udp" ]; then $SUDO sed -i -e "s/proto udp/proto tcp/g" /etc/openvpn/easy-rsa/pki/Default.txt fi # verify server name to strengthen security $SUDO sed -i "s/SRVRNAME/${SERVER_NAME}/" /etc/openvpn/easy-rsa/pki/Default.txt $SUDO mkdir "/home/$pivpnUser/ovpns" $SUDO chmod 0777 -R "/home/$pivpnUser/ovpns" } installPiVPN() { stopServices confUnattendedUpgrades $SUDO mkdir -p /etc/pivpn/ getGitFiles ${pivpnFilesDir} ${pivpnGitUrl} installScripts setCustomProto setCustomPort confOpenVPN confNetwork confOVPN setClientDNS } displayFinalMessage() { # Final completion message to user if [[ $PLAT == "Ubuntu" || $PLAT == "Debian" ]]; then $SUDO service openvpn start else $SUDO systemctl enable openvpn.service $SUDO systemctl start openvpn.service fi whiptail --msgbox --backtitle "Make it so." --title "Installation Complete!" "Now run 'pivpn add' to create the ovpn profiles. Run 'pivpn help' to see what else you can do! The install log is in /etc/pivpn." ${r} ${c} if (whiptail --title "Reboot" --yesno --defaultno "It is strongly recommended you reboot after installation. Would you like to reboot now?" ${r} ${c}); then whiptail --title "Rebooting" --msgbox "The system will now reboot." ${r} ${c} printf "\nRebooting system...\n" $SUDO sleep 3 $SUDO shutdown -r now fi } ######## SCRIPT ############ # Install the packages (we do this first because we need whiptail) checkForDependencies # Start the installer welcomeDialogs # Verify there is enough disk space for the install verifyFreeDiskSpace # Find interfaces and let the user choose one chooseInterface # Only try to set static on Raspbian, otherwise let user do it if [[ $PLAT != "Raspbian" ]]; then avoidStaticIPv4Ubuntu else getStaticIPv4Settings setStaticIPv4 fi setNetwork # Choose the user for the ovpns chooseUser # Ask if unattended-upgrades will be enabled unattendedUpgrades # Install installPiVPN displayFinalMessage echo "::: Install Complete..."