diff --git a/openvpn-install-original.sh b/openvpn-install-original.sh deleted file mode 100644 index 61df7a3..0000000 --- a/openvpn-install-original.sh +++ /dev/null @@ -1,1219 +0,0 @@ -#!/bin/bash - -# Secure OpenVPN server installer for Debian, Ubuntu, CentOS, Fedora and Arch Linux -# https://github.com/angristan/openvpn-install - -function isRoot () { - if [ "$EUID" -ne 0 ]; then - return 1 - fi -} - -function tunAvailable () { - if [ ! -e /dev/net/tun ]; then - return 1 - fi -} - -function checkOS () { - if [[ -e /etc/debian_version ]]; then - OS="debian" - source /etc/os-release - - if [[ "$ID" == "debian" ]]; then - if [[ ! $VERSION_ID =~ (8|9) ]]; then - echo "⚠️ Your version of Debian is not supported." - echo "" - echo "However, if you're using Debian >= 9 or unstable/testing then you can continue." - echo "Keep in mind they are not supported, though." - echo "" - until [[ $CONTINUE =~ (y|n) ]]; do - read -rp "Continue? [y/n]: " -e CONTINUE - done - if [[ "$CONTINUE" = "n" ]]; then - exit 1 - fi - fi - elif [[ "$ID" == "ubuntu" ]];then - OS="ubuntu" - if [[ ! $VERSION_ID =~ (16.04|18.04|19.04) ]]; then - echo "⚠️ Your version of Ubuntu is not supported." - echo "" - echo "However, if you're using Ubuntu > 17 or beta, then you can continue." - echo "Keep in mind they are not supported, though." - echo "" - until [[ $CONTINUE =~ (y|n) ]]; do - read -rp "Continue? [y/n]: " -e CONTINUE - done - if [[ "$CONTINUE" = "n" ]]; then - exit 1 - fi - fi - fi - elif [[ -e /etc/fedora-release ]]; then - OS=fedora - elif [[ -e /etc/centos-release ]]; then - if ! grep -qs "^CentOS Linux release 7" /etc/centos-release; then - echo "Your version of CentOS is not supported." - echo "The script only support CentOS 7." - echo "" - unset CONTINUE - until [[ $CONTINUE =~ (y|n) ]]; do - read -rp "Continue anyway? [y/n]: " -e CONTINUE - done - if [[ "$CONTINUE" = "n" ]]; then - echo "Ok, bye!" - exit 1 - fi - fi - OS=centos - elif [[ -e /etc/arch-release ]]; then - OS=arch - else - echo "Looks like you aren't running this installer on a Debian, Ubuntu, Fedora, CentOS or Arch Linux system" - exit 1 - fi -} - -function initialCheck () { - if ! isRoot; then - echo "Sorry, you need to run this as root" - exit 1 - fi - if ! tunAvailable; then - echo "TUN is not available" - exit 1 - fi - checkOS -} - -function installUnbound () { - if [[ ! -e /etc/unbound/unbound.conf ]]; then - - if [[ "$OS" =~ (debian|ubuntu) ]]; then - apt-get install -y unbound - - # Configuration - echo 'interface: 10.8.0.1 -access-control: 10.8.0.1/24 allow -hide-identity: yes -hide-version: yes -use-caps-for-id: yes -prefetch: yes' >> /etc/unbound/unbound.conf - - elif [[ "$OS" = "centos" ]]; then - yum install -y unbound - - # Configuration - sed -i 's|# interface: 0.0.0.0$|interface: 10.8.0.1|' /etc/unbound/unbound.conf - sed -i 's|# access-control: 127.0.0.0/8 allow|access-control: 10.8.0.1/24 allow|' /etc/unbound/unbound.conf - sed -i 's|# hide-identity: no|hide-identity: yes|' /etc/unbound/unbound.conf - sed -i 's|# hide-version: no|hide-version: yes|' /etc/unbound/unbound.conf - sed -i 's|use-caps-for-id: no|use-caps-for-id: yes|' /etc/unbound/unbound.conf - - elif [[ "$OS" = "fedora" ]]; then - dnf install -y unbound - - # Configuration - sed -i 's|# interface: 0.0.0.0$|interface: 10.8.0.1|' /etc/unbound/unbound.conf - sed -i 's|# access-control: 127.0.0.0/8 allow|access-control: 10.8.0.1/24 allow|' /etc/unbound/unbound.conf - sed -i 's|# hide-identity: no|hide-identity: yes|' /etc/unbound/unbound.conf - sed -i 's|# hide-version: no|hide-version: yes|' /etc/unbound/unbound.conf - sed -i 's|# use-caps-for-id: no|use-caps-for-id: yes|' /etc/unbound/unbound.conf - - elif [[ "$OS" = "arch" ]]; then - pacman -Syu --noconfirm unbound - - # Get root servers list - curl -o /etc/unbound/root.hints https://www.internic.net/domain/named.cache - - mv /etc/unbound/unbound.conf /etc/unbound/unbound.conf.old - - echo 'server: - use-syslog: yes - do-daemonize: no - username: "unbound" - directory: "/etc/unbound" - trust-anchor-file: trusted-key.key - root-hints: root.hints - interface: 10.8.0.1 - access-control: 10.8.0.1/24 allow - port: 53 - num-threads: 2 - use-caps-for-id: yes - harden-glue: yes - hide-identity: yes - hide-version: yes - qname-minimisation: yes - prefetch: yes' > /etc/unbound/unbound.conf - fi - - if [[ ! "$OS" =~ (fedora|centos) ]];then - # DNS Rebinding fix - echo "private-address: 10.0.0.0/8 -private-address: 172.16.0.0/12 -private-address: 192.168.0.0/16 -private-address: 169.254.0.0/16 -private-address: fd00::/8 -private-address: fe80::/10 -private-address: 127.0.0.0/8 -private-address: ::ffff:0:0/96" >> /etc/unbound/unbound.conf - fi - else # Unbound is already installed - echo 'include: /etc/unbound/openvpn.conf' >> /etc/unbound/unbound.conf - - # Add Unbound 'server' for the OpenVPN subnet - echo 'server: -interface: 10.8.0.1 -access-control: 10.8.0.1/24 allow -hide-identity: yes -hide-version: yes -use-caps-for-id: yes -prefetch: yes -private-address: 10.0.0.0/8 -private-address: 172.16.0.0/12 -private-address: 192.168.0.0/16 -private-address: 169.254.0.0/16 -private-address: fd00::/8 -private-address: fe80::/10 -private-address: 127.0.0.0/8 -private-address: ::ffff:0:0/96' > /etc/unbound/openvpn.conf - fi - - systemctl enable unbound - systemctl restart unbound -} - -function installQuestions () { - echo "Welcome to the OpenVPN installer!" - echo "The git repository is available at: https://github.com/angristan/openvpn-install" - echo "" - - echo "I need to ask you a few questions before starting the setup." - echo "You can leave the default options and just press enter if you are ok with them." - echo "" - echo "I need to know the IPv4 address of the network interface you want OpenVPN listening to." - echo "Unless your server is behind NAT, it should be your public IPv4 address." - - # Detect public IPv4 address and pre-fill for the user - IP=$(ip addr | grep 'inet' | grep -v inet6 | grep -vE '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | grep -oE '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | head -1) - APPROVE_IP=${APPROVE_IP:-n} - if [[ $APPROVE_IP =~ n ]]; then - read -rp "IP address: " -e -i "$IP" IP - fi - # If $IP is a private IP address, the server must be behind NAT - if echo "$IP" | grep -qE '^(10\.|172\.1[6789]\.|172\.2[0-9]\.|172\.3[01]\.|192\.168)'; then - echo "" - echo "It seems this server is behind NAT. What is its public IPv4 address or hostname?" - echo "We need it for the clients to connect to the server." - until [[ "$ENDPOINT" != "" ]]; do - read -rp "Public IPv4 address or hostname: " -e ENDPOINT - done - fi - - echo "" - echo "Checking for IPv6 connectivity..." - echo "" - # "ping6" and "ping -6" availability varies depending on the distribution - if type ping6 > /dev/null 2>&1; then - PING6="ping6 -c3 ipv6.google.com > /dev/null 2>&1" - else - PING6="ping -6 -c3 ipv6.google.com > /dev/null 2>&1" - fi - if eval "$PING6"; then - echo "Your host appears to have IPv6 connectivity." - SUGGESTION="y" - else - echo "Your host does not appear to have IPv6 connectivity." - SUGGESTION="n" - fi - echo "" - # Ask the user if they want to enable IPv6 regardless its availability. - until [[ $IPV6_SUPPORT =~ (y|n) ]]; do - read -rp "Do you want to enable IPv6 support (NAT)? [y/n]: " -e -i $SUGGESTION IPV6_SUPPORT - done - echo "" - echo "What port do you want OpenVPN to listen to?" - echo " 1) Default: 1194" - echo " 2) Custom" - echo " 3) Random [49152-65535]" - until [[ "$PORT_CHOICE" =~ ^[1-3]$ ]]; do - read -rp "Port choice [1-3]: " -e -i 1 PORT_CHOICE - done - case $PORT_CHOICE in - 1) - PORT="1194" - ;; - 2) - until [[ "$PORT" =~ ^[0-9]+$ ]] && [ "$PORT" -ge 1 ] && [ "$PORT" -le 65535 ]; do - read -rp "Custom port [1-65535]: " -e -i 1194 PORT - done - ;; - 3) - # Generate random number within private ports range - PORT=$(shuf -i49152-65535 -n1) - echo "Random Port: $PORT" - ;; - esac - echo "" - echo "What protocol do you want OpenVPN to use?" - echo "UDP is faster. Unless it is not available, you shouldn't use TCP." - echo " 1) UDP" - echo " 2) TCP" - until [[ "$PROTOCOL_CHOICE" =~ ^[1-2]$ ]]; do - read -rp "Protocol [1-2]: " -e -i 1 PROTOCOL_CHOICE - done - case $PROTOCOL_CHOICE in - 1) - PROTOCOL="udp" - ;; - 2) - PROTOCOL="tcp" - ;; - esac - echo "" - echo "What DNS resolvers do you want to use with the VPN?" - echo " 1) Current system resolvers (from /etc/resolv.conf)" - echo " 2) Self-hosted DNS Resolver (Unbound)" - echo " 3) Cloudflare (Anycast: worldwide)" - echo " 4) Quad9 (Anycast: worldwide)" - echo " 5) Quad9 uncensored (Anycast: worldwide)" - echo " 6) FDN (France)" - echo " 7) DNS.WATCH (Germany)" - echo " 8) OpenDNS (Anycast: worldwide)" - echo " 9) Google (Anycast: worldwide)" - echo " 10) Yandex Basic (Russia)" - echo " 11) AdGuard DNS (Russia)" - until [[ "$DNS" =~ ^[0-9]+$ ]] && [ "$DNS" -ge 1 ] && [ "$DNS" -le 11 ]; do - read -rp "DNS [1-10]: " -e -i 3 DNS - if [[ $DNS == 2 ]] && [[ -e /etc/unbound/unbound.conf ]]; then - echo "" - echo "Unbound is already installed." - echo "You can allow the script to configure it in order to use it from your OpenVPN clients" - echo "We will simply add a second server to /etc/unbound/unbound.conf for the OpenVPN subnet." - echo "No changes are made to the current configuration." - echo "" - - until [[ $CONTINUE =~ (y|n) ]]; do - read -rp "Apply configuration changes to Unbound? [y/n]: " -e CONTINUE - done - if [[ $CONTINUE = "n" ]];then - # Break the loop and cleanup - unset DNS - unset CONTINUE - fi - fi - done - echo "" - echo "Do you want to use compression? It is not recommended since the VORACLE attack make use of it." - until [[ $COMPRESSION_ENABLED =~ (y|n) ]]; do - read -rp"Enable compression? [y/n]: " -e -i n COMPRESSION_ENABLED - done - if [[ $COMPRESSION_ENABLED == "y" ]];then - echo "Choose which compression algorithm you want to use:" - echo " 1) LZ4 (more efficient)" - echo " 2) LZ0" - until [[ $COMPRESSION_CHOICE =~ ^[1-2]$ ]]; do - read -rp"Compression algorithm [1-2]: " -e -i 1 COMPRESSION_CHOICE - done - case $COMPRESSION_CHOICE in - 1) - COMPRESSION_ALG="lz4" - ;; - 2) - COMPRESSION_ALG="lzo" - ;; - esac - fi - echo "" - echo "Do you want to customize encryption settings?" - echo "Unless you know what you're doing, you should stick with the default parameters provided by the script." - echo "Note that whatever you choose, all the choices presented in the script are safe. (Unlike OpenVPN's defaults)" - echo "See https://github.com/angristan/openvpn-install#security-and-encryption to learn more." - echo "" - until [[ $CUSTOMIZE_ENC =~ (y|n) ]]; do - read -rp "Customize encryption settings? [y/n]: " -e -i n CUSTOMIZE_ENC - done - if [[ $CUSTOMIZE_ENC == "n" ]];then - # Use default, sane and fast parameters - CIPHER="AES-128-GCM" - CERT_TYPE="1" # ECDSA - CERT_CURVE="prime256v1" - CC_CIPHER="TLS-ECDHE-ECDSA-WITH-AES-128-GCM-SHA256" - DH_TYPE="1" # ECDH - DH_CURVE="prime256v1" - HMAC_ALG="SHA256" - TLS_SIG="1" # tls-crypt - else - echo "" - echo "Choose which cipher you want to use for the data channel:" - echo " 1) AES-128-GCM (recommended)" - echo " 2) AES-192-GCM" - echo " 3) AES-256-GCM" - echo " 4) AES-128-CBC" - echo " 5) AES-192-CBC" - echo " 6) AES-256-CBC" - until [[ "$CIPHER_CHOICE" =~ ^[1-6]$ ]]; do - read -rp "Cipher [1-6]: " -e -i 1 CIPHER_CHOICE - done - case $CIPHER_CHOICE in - 1) - CIPHER="AES-128-GCM" - ;; - 2) - CIPHER="AES-192-GCM" - ;; - 3) - CIPHER="AES-256-GCM" - ;; - 4) - CIPHER="AES-128-CBC" - ;; - 5) - CIPHER="AES-192-CBC" - ;; - 6) - CIPHER="AES-256-CBC" - ;; - esac - echo "" - echo "Choose what kind of certificate you want to use:" - echo " 1) ECDSA (recommended)" - echo " 2) RSA" - until [[ $CERT_TYPE =~ ^[1-2]$ ]]; do - read -rp"Certificate key 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 certificate's key:" - echo " 1) prime256v1 (recommended)" - echo " 2) secp384r1" - echo " 3) secp521r1" - until [[ $CERT_CURVE_CHOICE =~ ^[1-3]$ ]]; do - read -rp"Curve [1-3]: " -e -i 1 CERT_CURVE_CHOICE - done - case $CERT_CURVE_CHOICE in - 1) - CERT_CURVE="prime256v1" - ;; - 2) - CERT_CURVE="secp384r1" - ;; - 3) - CERT_CURVE="secp521r1" - ;; - esac - ;; - 2) - echo "" - echo "Choose which size you want to use for the certificate's RSA key:" - echo " 1) 2048 bits (recommended)" - echo " 2) 3072 bits" - echo " 3) 4096 bits" - until [[ "$RSA_KEY_SIZE_CHOICE" =~ ^[1-3]$ ]]; do - read -rp "RSA key size [1-3]: " -e -i 1 RSA_KEY_SIZE_CHOICE - done - case $RSA_KEY_SIZE_CHOICE in - 1) - RSA_KEY_SIZE="2048" - ;; - 2) - RSA_KEY_SIZE="3072" - ;; - 3) - RSA_KEY_SIZE="4096" - ;; - esac - ;; - esac - echo "" - echo "Choose which cipher you want to use for the control channel:" - case $CERT_TYPE in - 1) - echo " 1) ECDHE-ECDSA-AES-128-GCM-SHA256 (recommended)" - echo " 2) ECDHE-ECDSA-AES-256-GCM-SHA384" - until [[ $CC_CIPHER_CHOICE =~ ^[1-2]$ ]]; do - read -rp"Control channel cipher [1-2]: " -e -i 1 CC_CIPHER_CHOICE - done - case $CC_CIPHER_CHOICE in - 1) - CC_CIPHER="TLS-ECDHE-ECDSA-WITH-AES-128-GCM-SHA256" - ;; - 2) - CC_CIPHER="TLS-ECDHE-ECDSA-WITH-AES-256-GCM-SHA384" - ;; - esac - ;; - 2) - echo " 1) ECDHE-RSA-AES-128-GCM-SHA256 (recommended)" - echo " 2) ECDHE-RSA-AES-256-GCM-SHA384" - until [[ $CC_CIPHER_CHOICE =~ ^[1-2]$ ]]; do - read -rp"Control channel cipher [1-2]: " -e -i 1 CC_CIPHER_CHOICE - done - case $CC_CIPHER_CHOICE in - 1) - CC_CIPHER="TLS-ECDHE-RSA-WITH-AES-128-GCM-SHA256" - ;; - 2) - CC_CIPHER="TLS-ECDHE-RSA-WITH-AES-256-GCM-SHA384" - ;; - esac - ;; - esac - echo "" - echo "Choose what kind of Diffie-Hellman key you want to use:" - echo " 1) ECDH (recommended)" - echo " 2) DH" - until [[ $DH_TYPE =~ [1-2] ]]; do - read -rp"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) prime256v1 (recommended)" - echo " 2) secp384r1" - echo " 3) secp521r1" - while [[ $DH_CURVE_CHOICE != "1" && $DH_CURVE_CHOICE != "2" && $DH_CURVE_CHOICE != "3" ]]; do - read -rp"Curve [1-3]: " -e -i 1 DH_CURVE_CHOICE - done - case $DH_CURVE_CHOICE in - 1) - DH_CURVE="prime256v1" - ;; - 2) - DH_CURVE="secp384r1" - ;; - 3) - DH_CURVE="secp521r1" - ;; - esac - ;; - 2) - echo "" - echo "Choose what size of Diffie-Hellman key you want to use:" - echo " 1) 2048 bits (recommended)" - echo " 2) 3072 bits" - echo " 3) 4096 bits" - until [[ "$DH_KEY_SIZE_CHOICE" =~ ^[1-3]$ ]]; do - read -rp "DH key size [1-3]: " -e -i 1 DH_KEY_SIZE_CHOICE - done - case $DH_KEY_SIZE_CHOICE in - 1) - DH_KEY_SIZE="2048" - ;; - 2) - DH_KEY_SIZE="3072" - ;; - 3) - DH_KEY_SIZE="4096" - ;; - esac - ;; - esac - echo "" - # The "auth" options behaves differently with AEAD ciphers - if [[ "$CIPHER" =~ CBC$ ]]; then - echo "The digest algorithm authenticates data channel packets and tls-auth packets from the control channel." - elif [[ "$CIPHER" =~ GCM$ ]]; then - echo "The digest algorithm authenticates tls-auth packets from the control channel." - fi - echo "Which digest algorithm do you want to use for HMAC?" - echo " 1) SHA-256 (recommended)" - echo " 2) SHA-384" - echo " 3) SHA-512" - until [[ $HMAC_ALG_CHOICE =~ ^[1-3]$ ]]; do - read -rp "Digest algorithm [1-3]: " -e -i 1 HMAC_ALG_CHOICE - done - case $HMAC_ALG_CHOICE in - 1) - HMAC_ALG="SHA256" - ;; - 2) - HMAC_ALG="SHA384" - ;; - 3) - HMAC_ALG="SHA512" - ;; - esac - echo "" - echo "You can add an additional layer of security to the control channel with tls-auth and tls-crypt" - echo "tls-auth authenticates the packets, while tls-crypt authenticate and encrypt them." - echo " 1) tls-crypt (recommended)" - echo " 2) tls-auth" - until [[ $TLS_SIG =~ [1-2] ]]; do - read -rp "Control channel additional security mechanism [1-2]: " -e -i 1 TLS_SIG - done - fi - echo "" - echo "Okay, that was all I needed. We are ready to setup your OpenVPN server now." - echo "You will be able to generate a client at the end of the installation." - APPROVE_INSTALL=${APPROVE_INSTALL:-n} - if [[ $APPROVE_INSTALL =~ n ]]; then - read -n1 -r -p "Press any key to continue..." - fi -} - -function installOpenVPN () { - if [[ $AUTO_INSTALL == "y" ]]; then - # Set default choices so that no questions will be asked. - APPROVE_INSTALL=${APPROVE_INSTALL:-y} - APPROVE_IP=${APPROVE_IP:-y} - IPV6_SUPPORT=${IPV6_SUPPORT:-n} - PORT_CHOICE=${PORT_CHOICE:-1} - PROTOCOL_CHOICE=${PROTOCOL_CHOICE:-1} - DNS=${DNS:-1} - COMPRESSION_ENABLED=${COMPRESSION_ENABLED:-n} - CUSTOMIZE_ENC=${CUSTOMIZE_ENC:-n} - CLIENT=${CLIENT:-client} - PASS=${PASS:-1} - CONTINUE=${CONTINUE:-y} - - # Behind NAT, we'll default to the publicly reachable IPv4. - PUBLIC_IPV4=$(curl ifconfig.co) - ENDPOINT=${ENDPOINT:-$PUBLIC_IPV4} - fi - - # Run setup questions first, and set other variales if auto-install - installQuestions - - # Get the "public" interface from the default route - NIC=$(ip -4 route ls | grep default | grep -Po '(?<=dev )(\S+)' | head -1) - - if [[ "$OS" =~ (debian|ubuntu) ]]; then - apt-get update - apt-get -y install ca-certificates gnupg - # We add the OpenVPN repo to get the latest version. - if [[ "$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-get update - fi - if [[ "$VERSION_ID" = "16.04" ]]; then - echo "deb http://build.openvpn.net/debian/openvpn/stable trusty main" > /etc/apt/sources.list.d/openvpn.list - wget -O - https://swupdate.openvpn.net/repos/repo-public.gpg | apt-key add - - apt-get update - fi - # Ubuntu > 16.04 and Debian > 8 have OpenVPN >= 2.4 without the need of a third party repository. - apt-get install -y openvpn iptables openssl wget ca-certificates curl - elif [[ "$OS" = 'centos' ]]; then - yum install -y epel-release - yum install -y openvpn iptables openssl wget ca-certificates curl - elif [[ "$OS" = 'fedora' ]]; then - dnf install -y openvpn iptables openssl wget ca-certificates curl - elif [[ "$OS" = 'arch' ]]; then - # Install required dependencies and upgrade the system - pacman --needed --noconfirm -Syu openvpn iptables openssl wget ca-certificates curl - 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 - - # Install the latest version of easy-rsa from source - local version="3.0.6" - wget -O ~/EasyRSA-unix-v${version}.tgz https://github.com/OpenVPN/easy-rsa/releases/download/v${version}/EasyRSA-unix-v${version}.tgz - tar xzf ~/EasyRSA-unix-v${version}.tgz -C ~/ - mv ~/EasyRSA-v${version}/ /etc/openvpn/ - mv /etc/openvpn/EasyRSA-v${version}/ /etc/openvpn/easy-rsa/ - chown -R root:root /etc/openvpn/easy-rsa/ - rm -f ~/EasyRSA-unix-v${version}.tgz - - cd /etc/openvpn/easy-rsa/ - case $CERT_TYPE in - 1) - echo "set_var EASYRSA_ALGO ec" > vars - echo "set_var EASYRSA_CURVE $CERT_CURVE" >> vars - ;; - 2) - echo "set_var EASYRSA_KEY_SIZE $RSA_KEY_SIZE" > vars - ;; - esac - - # Generate a random, alphanumeric identifier of 16 characters for CN and one for server name - SERVER_CN="cn_$(head /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 16 | head -n 1)" - SERVER_NAME="server_$(head /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 16 | head -n 1)" - echo "set_var EASYRSA_REQ_CN $SERVER_CN" >> vars - # Create the PKI, set up the CA, the DH params and the server certificate - ./easyrsa init-pki - ./easyrsa --batch build-ca nopass - - if [[ $DH_TYPE == "2" ]]; then - # ECDH keys are generated on-the-fly so we don't need to generate them beforehand - openssl dhparam -out dh.pem $DH_KEY_SIZE - fi - - ./easyrsa build-server-full "$SERVER_NAME" nopass - EASYRSA_CRL_DAYS=3650 ./easyrsa gen-crl - - case $TLS_SIG in - 1) - # Generate tls-crypt key - openvpn --genkey --secret /etc/openvpn/tls-crypt.key - ;; - 2) - # Generate tls-auth key - openvpn --genkey --secret /etc/openvpn/tls-auth.key - ;; - esac - - # Move all the generated files - cp pki/ca.crt pki/private/ca.key "pki/issued/$SERVER_NAME.crt" "pki/private/$SERVER_NAME.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 $PORT" > /etc/openvpn/server.conf - if [[ "$IPV6_SUPPORT" = 'n' ]]; then - echo "proto $PROTOCOL" >> /etc/openvpn/server.conf - elif [[ "$IPV6_SUPPORT" = 'y' ]]; then - echo "proto ${PROTOCOL}6" >> /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) - # Locate the proper resolv.conf - # Needed for systems running systemd-resolved - if grep -q "127.0.0.53" "/etc/resolv.conf"; then - RESOLVCONF='/run/systemd/resolve/resolv.conf' - else - RESOLVCONF='/etc/resolv.conf' - fi - # Obtain the resolvers from resolv.conf and use them for OpenVPN - grep -v '#' $RESOLVCONF | grep 'nameserver' | grep -E -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | while read -r line; do - echo "push \"dhcp-option DNS $line\"" >> /etc/openvpn/server.conf - done - ;; - 2) - echo 'push "dhcp-option DNS 10.8.0.1"' >> /etc/openvpn/server.conf - ;; - 3) # Cloudflare - echo 'push "dhcp-option DNS 1.0.0.1"' >> /etc/openvpn/server.conf - echo 'push "dhcp-option DNS 1.1.1.1"' >> /etc/openvpn/server.conf - ;; - 4) # Quad9 - echo 'push "dhcp-option DNS 9.9.9.9"' >> /etc/openvpn/server.conf - echo 'push "dhcp-option DNS 149.112.112.112"' >> /etc/openvpn/server.conf - ;; - 5) # Quad9 uncensored - echo 'push "dhcp-option DNS 9.9.9.10"' >> /etc/openvpn/server.conf - echo 'push "dhcp-option DNS 149.112.112.10"' >> /etc/openvpn/server.conf - ;; - 6) # FDN - echo 'push "dhcp-option DNS 80.67.169.40"' >> /etc/openvpn/server.conf - echo 'push "dhcp-option DNS 80.67.169.12"' >> /etc/openvpn/server.conf - ;; - 7) # DNS.WATCH - echo 'push "dhcp-option DNS 84.200.69.80"' >> /etc/openvpn/server.conf - echo 'push "dhcp-option DNS 84.200.70.40"' >> /etc/openvpn/server.conf - ;; - 8) # OpenDNS - echo 'push "dhcp-option DNS 208.67.222.222"' >> /etc/openvpn/server.conf - echo 'push "dhcp-option DNS 208.67.220.220"' >> /etc/openvpn/server.conf - ;; - 9) # Google - echo 'push "dhcp-option DNS 8.8.8.8"' >> /etc/openvpn/server.conf - echo 'push "dhcp-option DNS 8.8.4.4"' >> /etc/openvpn/server.conf - ;; - 10) # Yandex Basic - echo 'push "dhcp-option DNS 77.88.8.8"' >> /etc/openvpn/server.conf - echo 'push "dhcp-option DNS 77.88.8.1"' >> /etc/openvpn/server.conf - ;; - 11) # AdGuard DNS - echo 'push "dhcp-option DNS 176.103.130.130"' >> /etc/openvpn/server.conf - echo 'push "dhcp-option DNS 176.103.130.131"' >> /etc/openvpn/server.conf - ;; - esac - echo 'push "redirect-gateway def1 bypass-dhcp"' >> /etc/openvpn/server.conf - - # IPv6 network settings if needed - if [[ "$IPV6_SUPPORT" = 'y' ]]; then - echo 'server-ipv6 fd42:42:42:42::/112 -tun-ipv6 -push tun-ipv6 -push "route-ipv6 2000::/3" -push "redirect-gateway ipv6"' >> /etc/openvpn/server.conf - fi - - if [[ $COMPRESSION_ENABLED == "y" ]]; then - echo "compress $COMPRESSION_ALG" >> /etc/openvpn/server.conf - fi - - if [[ $DH_TYPE == "1" ]]; then - echo "dh none" >> /etc/openvpn/server.conf - echo "ecdh-curve $DH_CURVE" >> /etc/openvpn/server.conf - elif [[ $DH_TYPE == "2" ]]; then - echo "dh dh.pem" >> /etc/openvpn/server.conf - fi - - case $TLS_SIG in - 1) - echo "tls-crypt tls-crypt.key 0" >> /etc/openvpn/server.conf - ;; - 2) - echo "tls-auth tls-auth.key 0" >> /etc/openvpn/server.conf - ;; - esac - - echo "crl-verify crl.pem -ca ca.crt -cert $SERVER_NAME.crt -key $SERVER_NAME.key -auth $HMAC_ALG -cipher $CIPHER -ncp-ciphers $CIPHER -tls-server -tls-version-min 1.2 -tls-cipher $CC_CIPHER -status /var/log/openvpn/status.log -verb 3" >> /etc/openvpn/server.conf - - # Create log dir - mkdir -p /var/log/openvpn - - # Enable routing - echo 'net.ipv4.ip_forward=1' >> /etc/sysctl.d/20-openvpn.conf - if [[ "$IPV6_SUPPORT" = 'y' ]]; then - echo 'net.ipv6.conf.all.forwarding=1' >> /etc/sysctl.d/20-openvpn.conf - fi - # Avoid an unneeded reboot - sysctl --system - - # 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 [[ "$PORT" != '1194' ]]; then - semanage port -a -t openvpn_port_t -p "$PROTOCOL" "$PORT" - fi - fi - fi - - # Finally, restart and enable OpenVPN - if [[ "$OS" = 'arch' || "$OS" = 'fedora' ]]; then - # Don't modify package-provided service - cp /usr/lib/systemd/system/openvpn-server@.service /etc/systemd/system/openvpn-server@.service - - # Workaround to fix OpenVPN service on OpenVZ - sed -i 's|LimitNPROC|#LimitNPROC|' /etc/systemd/system/openvpn-server@.service - # Another workaround to keep using /etc/openvpn/ - sed -i 's|/etc/openvpn/server|/etc/openvpn|' /etc/systemd/system/openvpn-server@.service - # On fedora, the service hardcodes the ciphers. We want to manage the cipher ourselves, so we remove it from the service - if [[ "$OS" == "fedora" ]];then - sed -i 's|--cipher AES-256-GCM --ncp-ciphers AES-256-GCM:AES-128-GCM:AES-256-CBC:AES-128-CBC:BF-CBC||' /etc/systemd/system/openvpn-server@.service - fi - - systemctl daemon-reload - systemctl restart openvpn-server@server - systemctl enable openvpn-server@server - elif [[ "$OS" == "ubuntu" ]] && [[ "$VERSION_ID" == "16.04" ]]; then - # On Ubuntu 16.04, we use the package from the OpenVPN repo - # This package uses a sysvinit service - systemctl enable openvpn - systemctl start openvpn - else - # Don't modify package-provided service - cp /lib/systemd/system/openvpn\@.service /etc/systemd/system/openvpn\@.service - - # Workaround to fix OpenVPN service on OpenVZ - sed -i 's|LimitNPROC|#LimitNPROC|' /etc/systemd/system/openvpn\@.service - # Another workaround to keep using /etc/openvpn/ - sed -i 's|/etc/openvpn/server|/etc/openvpn|' /etc/systemd/system/openvpn\@.service - - systemctl daemon-reload - systemctl restart openvpn@server - systemctl enable openvpn@server - fi - - if [[ $DNS == 2 ]];then - installUnbound - fi - - # Add iptables rules in two scripts - mkdir /etc/iptables - - # Script to add rules - echo "#!/bin/sh -iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o $NIC -j MASQUERADE -iptables -A INPUT -i tun0 -j ACCEPT -iptables -A FORWARD -i $NIC -o tun0 -j ACCEPT -iptables -A FORWARD -i tun0 -o $NIC -j ACCEPT -iptables -A INPUT -i $NIC -p $PROTOCOL --dport $PORT -j ACCEPT" > /etc/iptables/add-openvpn-rules.sh - - if [[ "$IPV6_SUPPORT" = 'y' ]]; then - echo "ip6tables -t nat -A POSTROUTING -s fd42:42:42:42::/112 -o $NIC -j MASQUERADE -ip6tables -A INPUT -i tun0 -j ACCEPT -ip6tables -A FORWARD -i $NIC -o tun0 -j ACCEPT -ip6tables -A FORWARD -i tun0 -o $NIC -j ACCEPT" >> /etc/iptables/add-openvpn-rules.sh - fi - - # Script to remove rules - echo "#!/bin/sh -iptables -t nat -D POSTROUTING -s 10.8.0.0/24 -o $NIC -j MASQUERADE -iptables -D INPUT -i tun0 -j ACCEPT -iptables -D FORWARD -i $NIC -o tun0 -j ACCEPT -iptables -D FORWARD -i tun0 -o $NIC -j ACCEPT -iptables -D INPUT -i $NIC -p $PROTOCOL --dport $PORT -j ACCEPT" > /etc/iptables/rm-openvpn-rules.sh - - if [[ "$IPV6_SUPPORT" = 'y' ]]; then - echo "ip6tables -t nat -D POSTROUTING -s fd42:42:42:42::/112 -o $NIC -j MASQUERADE -ip6tables -D INPUT -i tun0 -j ACCEPT -ip6tables -D FORWARD -i $NIC -o tun0 -j ACCEPT -ip6tables -D FORWARD -i tun0 -o $NIC -j ACCEPT" >> /etc/iptables/rm-openvpn-rules.sh - fi - - chmod +x /etc/iptables/add-openvpn-rules.sh - chmod +x /etc/iptables/rm-openvpn-rules.sh - - # Handle the rules via a systemd script - echo "[Unit] -Description=iptables rules for OpenVPN -Before=network-online.target -Wants=network-online.target - -[Service] -Type=oneshot -ExecStart=/etc/iptables/add-openvpn-rules.sh -ExecStop=/etc/iptables/rm-openvpn-rules.sh -RemainAfterExit=yes - -[Install] -WantedBy=multi-user.target" > /etc/systemd/system/iptables-openvpn.service - - # Enable service and apply rules - systemctl daemon-reload - systemctl enable iptables-openvpn - systemctl start iptables-openvpn - - # If the server is behind a NAT, use the correct IP address for the clients to connect to - if [[ "$ENDPOINT" != "" ]]; then - IP=$ENDPOINT - fi - - # client-template.txt is created so we have a template to add further users later - echo "client" > /etc/openvpn/client-template.txt - if [[ "$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 -persist-key -persist-tun -remote-cert-tls server -verify-x509-name $SERVER_NAME name -auth $HMAC_ALG -auth-nocache -cipher $CIPHER -tls-client -tls-version-min 1.2 -tls-cipher $CC_CIPHER -setenv opt block-outside-dns # Prevent Windows 10 DNS leak -verb 3" >> /etc/openvpn/client-template.txt - -if [[ $COMPRESSION_ENABLED == "y" ]]; then - echo "compress $COMPRESSION_ALG" >> /etc/openvpn/client-template.txt -fi - - # Generate the custom client.ovpn - newClient - echo "If you want to add more clients, you simply need to run this script another time!" -} - -function newClient () { - echo "" - echo "Tell me a name for the client." - echo "Use one word only, no special characters." - - until [[ "$CLIENT" =~ ^[a-zA-Z0-9_]+$ ]]; do - read -rp "Client name: " -e CLIENT - done - - echo "" - echo "Do you want to protect the configuration file with a password?" - echo "(e.g. encrypt the private key with a password)" - echo " 1) Add a passwordless client" - echo " 2) Use a password for the client" - - until [[ "$PASS" =~ ^[1-2]$ ]]; do - read -rp "Select an option [1-2]: " -e -i 1 PASS - done - - cd /etc/openvpn/easy-rsa/ || return - case $PASS in - 1) - ./easyrsa build-client-full "$CLIENT" nopass - ;; - 2) - echo "⚠️ You will be asked for the client password below ⚠️" - ./easyrsa build-client-full "$CLIENT" - ;; - esac - - # Home directory of the user, where the client configuration (.ovpn) will be written - if [ -e "/home/$CLIENT" ]; then # if $1 is a user name - homeDir="/home/$CLIENT" - elif [ "${SUDO_USER}" ]; then # if not, use SUDO_USER - homeDir="/home/${SUDO_USER}" - else # if not SUDO_USER, use /root - homeDir="/root" - fi - - # Determine if we use tls-auth or tls-crypt - if grep -qs "^tls-crypt" /etc/openvpn/server.conf; then - TLS_SIG="1" - elif grep -qs "^tls-auth" /etc/openvpn/server.conf; then - TLS_SIG="2" - fi - - # Generates the custom client.ovpn - cp /etc/openvpn/client-template.txt "$homeDir/$CLIENT.ovpn" - { - echo "" - cat "/etc/openvpn/easy-rsa/pki/ca.crt" - echo "" - - echo "" - awk '/BEGIN/,/END/' "/etc/openvpn/easy-rsa/pki/issued/$CLIENT.crt" - echo "" - - echo "" - cat "/etc/openvpn/easy-rsa/pki/private/$CLIENT.key" - echo "" - - case $TLS_SIG in - 1) - echo "" - cat /etc/openvpn/tls-crypt.key - echo "" - ;; - 2) - echo "key-direction 1" - echo "" - cat /etc/openvpn/tls-auth.key - echo "" - ;; - esac - } >> "$homeDir/$CLIENT.ovpn" - - echo "" - echo "Client $CLIENT added, the configuration file is available at $homeDir/$CLIENT.ovpn." - echo "Download the .ovpn file and import it in your OpenVPN client." - - exit 0 -} - -function revokeClient () { - 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 1 - 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 [[ "$NUMBEROFCLIENTS" = '1' ]]; then - read -rp "Select one client [1]: " CLIENTNUMBER - else - read -rp "Select one client [1-$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 "$CLIENT" - EASYRSA_CRL_DAYS=3650 ./easyrsa gen-crl - # Cleanup - rm -f "pki/reqs/$CLIENT.req" - rm -f "pki/private/$CLIENT.key" - rm -f "pki/issued/$CLIENT.crt" - rm -f /etc/openvpn/crl.pem - cp /etc/openvpn/easy-rsa/pki/crl.pem /etc/openvpn/crl.pem - chmod 644 /etc/openvpn/crl.pem - find /home/ -maxdepth 2 -name "$CLIENT.ovpn" -delete - rm -f "/root/$CLIENT.ovpn" - sed -i "s|^$CLIENT,.*||" /etc/openvpn/ipp.txt - - echo "" - echo "Certificate for client $CLIENT revoked." -} - -function removeUnbound () { - # Remove OpenVPN-related config - sed -i 's|include: \/etc\/unbound\/openvpn.conf||' /etc/unbound/unbound.conf - rm /etc/unbound/openvpn.conf - systemctl restart unbound - - until [[ $REMOVE_UNBOUND =~ (y|n) ]]; do - echo "" - echo "If you were already using Unbound before installing OpenVPN, I removed the configuration related to OpenVPN." - read -rp "Do you want to completely remove Unbound? [y/n]: " -e REMOVE_UNBOUND - done - - if [[ "$REMOVE_UNBOUND" = 'y' ]]; then - # Stop Unbound - systemctl stop unbound - - if [[ "$OS" =~ (debian|ubuntu) ]]; then - apt-get autoremove --purge -y unbound - elif [[ "$OS" = 'arch' ]]; then - pacman --noconfirm -R unbound - elif [[ "$OS" = 'centos' ]]; then - yum remove -y unbound - elif [[ "$OS" = 'fedora' ]]; then - dnf remove -y unbound - fi - - rm -rf /etc/unbound/ - - echo "" - echo "Unbound removed!" - else - echo "" - echo "Unbound wasn't removed." - fi -} - -function removeOpenVPN () { - echo "" - read -rp "Do you really want to remove OpenVPN? [y/n]: " -e -i n REMOVE - if [[ "$REMOVE" = 'y' ]]; then - # Get OpenVPN port from the configuration - PORT=$(grep '^port ' /etc/openvpn/server.conf | cut -d " " -f 2) - - # Stop OpenVPN - if [[ "$OS" =~ (fedora|arch) ]]; then - systemctl disable openvpn-server@server - systemctl stop openvpn-server@server - # Remove customised service - rm /etc/systemd/system/openvpn-server@.service - elif [[ "$OS" == "ubuntu" ]] && [[ "$VERSION_ID" == "16.04" ]]; then - systemctl disable openvpn - systemctl stop openvpn - else - systemctl disable openvpn@server - systemctl stop openvpn@server - # Remove customised service - rm /etc/systemd/system/openvpn\@.service - fi - - # Remove the iptables rules related to the script - systemctl stop iptables-openvpn - # Cleanup - systemctl disable iptables-openvpn - rm /etc/systemd/system/iptables-openvpn.service - systemctl daemon-reload - rm /etc/iptables/add-openvpn-rules.sh - rm /etc/iptables/rm-openvpn-rules.sh - - # SELinux - if hash sestatus 2>/dev/null; then - if sestatus | grep "Current mode" | grep -qs "enforcing"; then - if [[ "$PORT" != '1194' ]]; then - semanage port -d -t openvpn_port_t -p udp "$PORT" - fi - fi - fi - - if [[ "$OS" =~ (debian|ubuntu) ]]; then - apt-get autoremove --purge -y openvpn - if [[ -e /etc/apt/sources.list.d/openvpn.list ]];then - rm /etc/apt/sources.list.d/openvpn.list - apt-get update - fi - elif [[ "$OS" = 'arch' ]]; then - pacman --noconfirm -R openvpn - elif [[ "$OS" = 'centos' ]]; then - yum remove -y openvpn - elif [[ "$OS" = 'fedora' ]]; then - dnf remove -y openvpn - fi - - # Cleanup - find /home/ -maxdepth 2 -name "*.ovpn" -delete - find /root/ -maxdepth 1 -name "*.ovpn" -delete - rm -rf /etc/openvpn - rm -rf /usr/share/doc/openvpn* - rm -f /etc/sysctl.d/20-openvpn.conf - rm -rf /var/log/openvpn - - # Unbound - if [[ -e /etc/unbound/openvpn.conf ]]; then - removeUnbound - fi - echo "" - echo "OpenVPN removed!" - else - echo "" - echo "Removal aborted!" - fi -} - -function manageMenu () { - clear - echo "Welcome to OpenVPN-install!" - echo "The git repository is available at: https://github.com/angristan/openvpn-install" - echo "" - echo "It looks like OpenVPN is already installed." - echo "" - echo "What do you want to do?" - echo " 1) Add a new user" - echo " 2) Revoke existing user" - echo " 3) Remove OpenVPN" - echo " 4) Exit" - until [[ "$MENU_OPTION" =~ ^[1-4]$ ]]; do - read -rp "Select an option [1-4]: " MENU_OPTION - done - - case $MENU_OPTION in - 1) - newClient - ;; - 2) - revokeClient - ;; - 3) - removeOpenVPN - ;; - 4) - exit 0 - ;; - esac -} - -# Check for root, TUN, OS... -initialCheck - -# Check if OpenVPN is already installed -if [[ -e /etc/openvpn/server.conf ]]; then - manageMenu -else - installOpenVPN -fi