diff --git a/Angristan/2.4/openvpn-install.sh b/Angristan/2.4/openvpn-install.sh new file mode 100755 index 0000000..c54ce08 --- /dev/null +++ b/Angristan/2.4/openvpn-install.sh @@ -0,0 +1,838 @@ +#!/bin/bash + +# Secure OpenVPN server installer for Debian, Ubuntu, CentOS and Arch Linux +# https://github.com/Angristan/OpenVPN-install + + +if [[ "$EUID" -ne 0 ]]; then + echo "Sorry, you need to run this as root" + exit 1 +fi + +if [[ ! -e /dev/net/tun ]]; then + echo "TUN is not available" + exit 2 +fi + +if grep -qs "CentOS release 5" "/etc/redhat-release"; then + echo "CentOS 5 is too old and not supported" + exit 3 +fi + +if [[ -e /etc/debian_version ]]; then + OS="debian" + # Getting the version number, to verify that a recent version of OpenVPN is available + VERSION_ID=$(cat /etc/os-release | grep "VERSION_ID") + RCLOCAL='/etc/rc.local' + SYSCTL='/etc/sysctl.conf' + if [[ "$VERSION_ID" != 'VERSION_ID="8"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="9"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="14.04"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="16.04"' ]] && [[ "$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 + RCLOCAL='/etc/rc.d/rc.local' + SYSCTL='/etc/sysctl.conf' + # Needed for CentOS 7 + chmod +x /etc/rc.d/rc.local +elif [[ -e /etc/arch-release ]]; then + OS=arch + RCLOCAL='/etc/rc.local' + 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 +fi + +newclient () { + # Where to write the custom client.ovpn? + if [ ${SUDO_USER} ]; then # if not, use SUDO_USER + homeDir="/home/${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 "" >> $homeDir/$1.ovpn + cat /etc/openvpn/easy-rsa/pki/ca.crt >> $homeDir/$1.ovpn + echo "" >> $homeDir/$1.ovpn + echo "" >> $homeDir/$1.ovpn + cat /etc/openvpn/easy-rsa/pki/issued/$1.crt >> $homeDir/$1.ovpn + echo "" >> $homeDir/$1.ovpn + echo "" >> $homeDir/$1.ovpn + cat /etc/openvpn/easy-rsa/pki/private/$1.key >> $homeDir/$1.ovpn + echo "" >> $homeDir/$1.ovpn + #We verify if we used tls-crypt or tls-auth during the installation + TLS_SIG=$(cat /etc/openvpn/TLS_SIG) + if [[ $TLS_SIG == "1" ]]; then + echo "" >> ~/$1.ovpn + cat /etc/openvpn/tls-crypt.key >> ~/$1.ovpn + echo "" >> ~/$1.ovpn + elif [[ $TLS_SIG == "2" ]]; then + echo "key-direction 1" >> $homeDir/$1.ovpn + echo "" >> $homeDir/$1.ovpn + cat /etc/openvpn/tls-auth.key >> $homeDir/$1.ovpn + echo "" >> $homeDir/$1.ovpn + fi +} + +# Try to get our IP from the system and fallback to the Internet. +# I do this to make the script compatible with NATed servers (LowEndSpirit/Scaleway) +# and to avoid getting an IPv6. +IP=$(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) +fi +# Get Internet network interface with default route +NIC=$(ip -4 route ls | grep default | grep -Po '(?<=dev )(\S+)') + +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 + sed -i "/iptables -I INPUT -p udp --dport $PORT -j ACCEPT/d" $RCLOCAL + sed -i "/iptables -I FORWARD -s 10.8.0.0\/24 -j ACCEPT/d" $RCLOCAL + sed -i "/iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT/d" $RCLOCAL + fi + sed -i '/iptables -t nat -A POSTROUTING -s 10.8.0.0\/24 -j SNAT --to /d' $RCLOCAL + if hash sestatus 2>/dev/null; then + if sestatus | grep "Current mode" | grep -qs "enforcing"; then + if [[ "$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* + # Where are the client files? + if [ ${SUDO_USER} ]; then # if not, use SUDO_USER + homeDir="/home/${SUDO_USER}" + else # if not SUDO_USER, use /root + homeDir="/root" + fi + rm $homeDir/*.ovpn + 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)" + echo " 1) UDP (recommended)" + echo " 2) TCP" + while [[ $PROTOCOL != "1" && $PROTOCOL != "2" ]]; do + read -p "Protocol [1-2]: " -e -i 1 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)" + while [[ $DNS != "1" && $DNS != "2" && $DNS != "3" && $DNS != "4" && $DNS != "5" && $DNS != "6" ]]; do + read -p "DNS [1-6]: " -e -i 1 DNS + done + echo "" + echo "Choose which compression algorithm you want to use:" + echo " 1) LZ4 (faster)" + echo " 2) LZ0 (use for OpenVPN 2.3 compatibility" + while [[ $COMPRESSION != "1" && $COMPRESSION != "2" ]]; do + read -p "Compression algorithm [1-2]: " -e -i 1 COMPRESSION + done + case $COMPRESSION in + 1) + COMPRESSION="lz4" + ;; + 2) + COMPRESSION="lzo" + ;; + esac + echo "" + echo "See https://github.com/Angristan/OpenVPN-install#encryption to learn more about " + echo "the encryption in OpenVPN and the choices proposed in this script." + echo "Please note that all the choices proposed are secure enough considering today's strandards, unlike some default OpenVPN options" + echo "You can just type "enter" if you don't know what to choose." + echo "Note that if you want to use an OpenVPN 2.3 client, You'll have to choose OpenVPN 2.3-compatible options." + echo "All OpenVPN 2.3-compatible choices are specified for each following option." + echo "" + echo "Choose which cipher you want to use for the data channel:" + echo " 1) AES-128-GCM (recommended)" + echo " 2) AES-192-GCM" + echo " 3) AES-256-GCM" + echo "Only use AES-CBC for OpenVPN 2.3 compatibilty" + echo " 4) AES-128-CBC" + echo " 5) AES-192-CBC" + echo " 6) AES-256-CBC" + while [[ $CIPHER != "1" && $CIPHER != "2" && $CIPHER != "3" && $CIPHER != "4" && $CIPHER != "5" && $CIPHER != "6" ]]; do + read -p "Data channel cipher [1-6]: " -e -i 1 CIPHER + done + case $CIPHER in + 1) + CIPHER="cipher AES-128-GCM" + ;; + 2) + CIPHER="cipher AES-192-GCM" + ;; + 3) + CIPHER="cipher AES-256-GCM" + ;; + 4) + CIPHER="cipher AES-128-CBC" + ;; + 5) + CIPHER="cipher AES-192-CBC" + ;; + 6) + CIPHER="cipher AES-256-CBC" + ;; + esac + echo "" + echo "Choose what kind of certificate you want to use:" + echo "Elleptic Curves keys (EC) are recommended, they're faster, lighter and more secure." + echo "Use RSA for OpenVPN 2.3 compatibilty" + echo " 1) ECDSA (recommended)" + echo " 2) RSA" + while [[ $CERT_TYPE != "1" && $CERT_TYPE != "2" ]]; do + read -p "Certificate type [1-2]: " -e -i 1 CERT_TYPE + done + case $CERT_TYPE in + 1) + echo "" + echo "Choose which curve you want to use for the EC key:" + echo " 1) secp256r1" + echo " 2) secp384r1 (recommended)" + echo " 3) secp521r1" + while [[ $CERT_CURVE != "1" && $CERT_CURVE != "2" && $CERT_CURVE != "3" ]]; do + read -p "Curve [1-3]: " -e -i 2 CERT_CURVE + done + case $CERT_CURVE in + 1) + CERT_CURVE="secp256r1" + ;; + 2) + CERT_CURVE="secp384r1" + ;; + 3) + CERT_CURVE="secp521r1" + ;; + esac + ;; + 2) + echo "" + echo "Choose which RSA key size you want to use:" + echo " 1) 2048 bits" + echo " 2) 3072 bits (recommended)" + echo " 3) 4096 bits" + while [[ $RSA_SIZE != "1" && $RSA_SIZE != "2" && $RSA_SIZE != "3" ]]; do + read -p "DH key size [1-3]: " -e -i 2 RSA_SIZE + done + case $RSA_SIZE in + 1) + RSA_SIZE="2048" + ;; + 2) + RSA_SIZE="3072" + ;; + 3) + RSA_SIZE="4096" + ;; + esac + ;; + esac + echo "" + echo "Choose which hash algorithm you want to use for the certificate:" + echo " 1) SHA-256" + echo " 2) SHA-384 (recommended)" + echo " 3) SHA-512" + while [[ $CERT_HASH != "1" && $CERT_HASH != "2" && $CERT_HASH != "3" ]]; do + read -p "Hash algorithm [1-3]: " -e -i 2 CERT_HASH + done + case $CERT_HASH in + 1) + CERT_HASH="sha256" + ;; + 2) + CERT_HASH="sha384" + ;; + 3) + CERT_HASH="sha512" + ;; + esac + echo "" + echo "Choose what kind of Diffie-Hellman key you want to use." + echo "Elleptic Curves (EC) are recommended, they're faster, lighter and more secure." + echo "Use DH for OpenVPN 2.3 compatibilty" + echo " 1) ECDH (recommended)" + echo " 2) DH" + while [[ $DH_TYPE != "1" && $DH_TYPE != "2" ]]; do + read -p "DH key type [1-2]: " -e -i 1 DH_TYPE + done + case $DH_TYPE in + 1) + echo "" + echo "Choose which curve you want to use for the ECDH key" + echo " 1) secp256r1" + echo " 2) secp384r1 (recommended)" + echo " 3) secp521r1" + while [[ $DH_CURVE != "1" && $DH_CURVE != "2" && $DH_CURVE != "3" ]]; do + read -p "Curve [1-3]: " -e -i 2 DH_CURVE + done + case $DH_CURVE in + 1) + DH_CURVE="secp256r1" + ;; + 2) + DH_CURVE="secp384r1" + ;; + 3) + DH_CURVE="secp521r1" + ;; + esac + ;; + 2) + echo"" + echo "Choose which DH key size you want to use" + echo " 1) 2048 bits" + echo " 2) 3072 bits (recommended)" + echo " 3) 4096 bits" + while [[ $DH_SIZE != "1" && $DH_SIZE != "2" && $DH_SIZE != "3" ]]; do + read -p "DH key size [1-3]: " -e -i 2 DH_SIZE + done + case $DH_SIZE in + 1) + DH_SIZE="2048" + ;; + 2) + DH_SIZE="3072" + ;; + 3) + DH_SIZE="4096" + ;; + esac + ;; + esac + echo "" + echo "Choose which cipher you want to use for the control channel:" + if [[ "$CERT_TYPE" = '1' ]]; then + echo " 1) ECDHE-ECDSA-AES-256-GCM-SHA384 (recommended)" + echo " 2) ECDHE-ECDSA-AES-128-GCM-SHA256" + while [[ $CC_ENC != "1" && $CC_ENC != "2" ]]; do + read -p "Control channel cipher [1-2]: " -e -i 1 CC_ENC + done + case $CC_ENC in + 1) + CC_ENC="TLS-ECDHE-ECDSA-WITH-AES-256-GCM-SHA384" + ;; + 2) + CC_ENC="TLS-ECDHE-ECDSA-WITH-AES-128-GCM-SHA256" + ;; + esac + elif [[ "$CERT_TYPE" = '2' ]]; then + echo " 1) ECDHE-RSA-AES-256-GCM-SHA384 (recommended)" + echo " 2) ECDHE-RSA-AES-128-GCM-SHA256" + while [[ $CC_ENC != "1" && $CC_ENC != "2" ]]; do + read -p "Control channel cipher [1-2]: " -e -i 1 CC_ENC + done + case $CC_ENC in + 1) + CC_ENC="TLS-ECDHE-RSA-WITH-AES-256-GCM-SHA384" + ;; + 2) + CC_ENC="TLS-ECDHE-RSA-WITH-AES-128-GCM-SHA256" + ;; + esac + fi + echo "" + echo "Do you want to use tls-crypt or tls-auth?" + echo "They both encrypt and authenticate all control channel packets with a key." + echo "tls-crypt is more advanced and secure than tls-auth, but it's an OpenVPN 2.4 feature." + echo " 1) tls-crypt (recommended)" + echo " 2) tls-auth (use only for OpenVPN 2.3 client compatibility)" + while [[ $TLS_SIG != "1" && $TLS_SIG != "2" ]]; do + read -p "Crontrol channel additional security layer [1-2]: " -e -i 1 TLS_SIG + done + echo"" + if [[ $CIPHER = "cipher AES-256-GCM" ]] || [[ $CIPHER = "cipher AES-192-GCM" ]] || [[ $CIPHER = "cipher AES-128-GCM" ]]; then + echo "Choose which message digest algorithm you want to use for the tls-auth/tls-crypt control channel packets:" + elif [[ $CIPHER = "cipher AES-256-CBC" ]] || [[ $CIPHER = "cipher AES-192-CBC" ]] || [[ $CIPHER = "cipher AES-128-CBC" ]]; then + echo "Choose which message digest algorithm you want to use for the data channel packets" + echo "and the tls-auth/tls-crypt control channel packets:" + fi + echo " 1) SHA-256" + echo " 2) SHA-384 (recommended)" + echo " 3) SHA-512" + while [[ $HMAC_AUTH != "1" && $HMAC_AUTH != "2" && $HMAC_AUTH != "3" ]]; do + read -p "HMAC authentication algorithm [1-3]: " -e -i 2 HMAC_AUTH + done + case $HMAC_AUTH in + 1) + HMAC_AUTH="SHA256" + ;; + 2) + HMAC_AUTH="SHA384" + ;; + 3) + HMAC_AUTH="SHA512" + ;; + 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 8 + if [[ "$VERSION_ID" = 'VERSION_ID="8"' ]]; then + echo "deb http://build.openvpn.net/debian/openvpn/stable jessie main" > /etc/apt/sources.list.d/openvpn.list + wget -O - https://swupdate.openvpn.net/repos/repo-public.gpg | apt-key add - + # Ubuntu 14.04 + elif [[ "$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 - + # Ubuntu 16.04 + elif [[ "$VERSION_ID" = 'VERSION_ID="16.04"' ]]; then + echo "deb http://build.openvpn.net/debian/openvpn/stable xenial main" > /etc/apt/sources.list.d/openvpn.list + wget -O - https://swupdate.openvpn.net/repos/repo-public.gpg | apt-key add - + fi + # Ubuntu >= 17.04 and Debian > 9 have OpenVPN 2.4 without the need of a third party repository. + # The we install OpenVPN + apt-get update + apt-get install openvpn iptables openssl wget ca-certificates curl -y + elif [[ "$OS" = 'centos' ]]; then + yum install epel-release -y + yum install openvpn iptables openssl wget ca-certificates curl -y + 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 rc.local + echo "[Unit] +Description=/etc/rc.local compatibility + +[Service] +Type=oneshot +ExecStart=/etc/rc.local +RemainAfterExit=yes + +[Install] +WantedBy=multi-user.target" > /etc/systemd/system/rc-local.service + chmod +x /etc/rc.local + systemctl enable rc-local.service + if ! grep '#!' $RCLOCAL; then + echo "#!/bin/bash" > $RCLOCAL + fi + fi + + # Install dependencies + pacman -Syu openvpn iptables openssl wget ca-certificates curl --needed --noconfirm + if [[ "$OS" = 'arch' ]]; then + touch /etc/iptables/iptables.rules # iptables won't start if this file does not exist + systemctl enable iptables + systemctl start iptables + fi + fi + + #To remember if we use tls-crypt or tls-auth when generating a new client conf + echo $TLS_SIG > /etc/openvpn/TLS_SIG + + # 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/ + if [[ $CERT_TYPE == "1" ]]; then + echo "set_var EASYRSA_ALGO ec +set_var EASYRSA_CURVE $CERT_CURVE" > vars + elif [[ $CERT_TYPE == "2" ]]; then + echo "set_var EASYRSA_KEY_SIZE $RSA_SIZE" > vars + fi + echo 'set_var EASYRSA_DIGEST "'$CERT_HASH'"' >> vars + # Create the PKI, set up the CA, the DH params and the server + client certificates + ./easyrsa init-pki + ./easyrsa --batch build-ca nopass + if [[ $DH_TYPE == "2" ]]; then + openssl dhparam -out dh.pem $DH_SIZE + fi + ./easyrsa build-server-full server nopass + ./easyrsa build-client-full $CLIENT nopass + EASYRSA_CRL_DAYS=3650 ./easyrsa gen-crl + if [[ $TLS_SIG == "1" ]]; then + # Generate tls-crypt key + openvpn --genkey --secret /etc/openvpn/tls-crypt.key + elif [[ $TLS_SIG == "2" ]]; then + # Generate tls-auth key + openvpn --genkey --secret /etc/openvpn/tls-auth.key + fi + # Move all the generated files + cp pki/ca.crt pki/private/ca.key pki/issued/server.crt pki/private/server.key /etc/openvpn/easy-rsa/pki/crl.pem /etc/openvpn + if [[ $DH_TYPE == "2" ]]; then + cp dh.pem /etc/openvpn + fi + # 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" = '1' ]]; then + echo "proto udp" >> /etc/openvpn/server.conf + elif [[ "$PROTOCOL" = '2' ]]; then + echo "proto tcp" >> /etc/openvpn/server.conf + fi + echo "dev tun +user nobody +group $NOGROUP +persist-key +persist-tun +keepalive 10 120 +topology subnet +server 10.8.0.0 255.255.255.0 +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) #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 + ;; + 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" >> /etc/openvpn/server.conf +if [[ $TLS_SIG == "1" ]]; then + echo "tls-crypt tls-crypt.key 0" >> /etc/openvpn/server.conf +elif [[ $TLS_SIG == "2" ]]; then + echo "tls-auth tls-auth.key 0" >> /etc/openvpn/server.conf +fi +if [[ $DH_TYPE == "1" ]]; then + echo "dh none +ecdh-curve $DH_CURVE" >> /etc/openvpn/server.conf +elif [[ $DH_TYPE == "2" ]]; then + echo "dh dh.pem" >> /etc/openvpn/server.conf +fi +echo "auth $HMAC_AUTH +$CIPHER +ncp-disable +tls-server +tls-version-min 1.2 +tls-cipher $CC_ENC +compress $COMPRESSION +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 + + # Enable net.ipv4.ip_forward for the system + sed -i '/\/c\net.ipv4.ip_forward=1' $SYSCTL + if ! grep -q "\" $SYSCTL; then + echo 'net.ipv4.ip_forward=1' >> $SYSCTL + fi + # Avoid an unneeded reboot + echo 1 > /proc/sys/net/ipv4/ip_forward + # Needed to use rc.local with some systemd distros + if [[ "$OS" = 'debian' && ! -e $RCLOCAL ]]; then + echo '#!/bin/sh -e + exit 0' > $RCLOCAL + fi + chmod +x $RCLOCAL + # Set NAT for the VPN subnet + iptables -t nat -A POSTROUTING -o $NIC -s 10.8.0.0/24 -j MASQUERADE + sed -i "1 a\iptables -t nat -A POSTROUTING -o $NIC -s 10.8.0.0/24 -j MASQUERADE" $RCLOCAL + if pgrep firewalld; then + # We don't use --add-service=openvpn because that would only work with + # the default port. Using both permanent and not permanent rules to + # avoid a firewalld reload. + if [[ "$PROTOCOL" = '1' ]]; then + firewall-cmd --zone=public --add-port=$PORT/udp + firewall-cmd --permanent --zone=public --add-port=$PORT/udp + elif [[ "$PROTOCOL" = '2' ]]; then + firewall-cmd --zone=public --add-port=$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" = '1' ]]; then + iptables -I INPUT -p udp --dport $PORT -j ACCEPT + elif [[ "$PROTOCOL" = '2' ]]; then + iptables -I INPUT -p tcp --dport $PORT -j ACCEPT + fi + iptables -I FORWARD -s 10.8.0.0/24 -j ACCEPT + iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT + if [[ "$PROTOCOL" = '1' ]]; then + sed -i "1 a\iptables -I INPUT -p udp --dport $PORT -j ACCEPT" $RCLOCAL + elif [[ "$PROTOCOL" = '2' ]]; then + sed -i "1 a\iptables -I INPUT -p tcp --dport $PORT -j ACCEPT" $RCLOCAL + fi + sed -i "1 a\iptables -I FORWARD -s 10.8.0.0/24 -j ACCEPT" $RCLOCAL + sed -i "1 a\iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT" $RCLOCAL + fi + # If SELinux is enabled and a custom port was selected, we need this + if hash sestatus 2>/dev/null; then + if sestatus | grep "Current mode" | grep -qs "enforcing"; then + if [[ "$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" = '1' ]]; then + semanage port -a -t openvpn_port_t -p udp $PORT + elif [[ "$PROTOCOL" = '2' ]]; 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" = '1' ]]; then + echo "proto udp" >> /etc/openvpn/client-template.txt + elif [[ "$PROTOCOL" = '2' ]]; then + echo "proto tcp-client" >> /etc/openvpn/client-template.txt + fi + echo "remote $IP $PORT +dev tun +resolv-retry infinite +nobind +persist-key +persist-tun +remote-cert-tls server +auth $HMAC_AUTH +$CIPHER +tls-client +tls-version-min 1.2 +tls-cipher $CC_ENC +setenv opt block-outside-dns +verb 3" >> /etc/openvpn/client-template.txt + + # Generate the custom client.ovpn + newclient "$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!" +fi +exit 0;