From e95c9b519c45a9e3174eb01900fd05673b6371da Mon Sep 17 00:00:00 2001 From: BornToBeRoot Date: Mon, 29 Apr 2019 02:20:39 +0200 Subject: [PATCH] added firewalld config (from nyr/openvpn-install) --- openvpn-install-original.sh | 1219 +++++++++++++++++++++++++++++++++++ openvpn-install.sh | 97 ++- 2 files changed, 1288 insertions(+), 28 deletions(-) create mode 100644 openvpn-install-original.sh diff --git a/openvpn-install-original.sh b/openvpn-install-original.sh new file mode 100644 index 0000000..61df7a3 --- /dev/null +++ b/openvpn-install-original.sh @@ -0,0 +1,1219 @@ +#!/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 $MENU_OPTION in + 1) + newClient + ;; + 2) + revokeClient + ;; + 3) + removeOpenVPN + ;; + 4) + exit 0 + ;; + esac +} + +# Check for root, TUN, OS... +initialCheck + +# Check if OpenVPN is already installed +if [[ -e /etc/openvpn/server.conf ]]; then + manageMenu +else + installOpenVPN +fi diff --git a/openvpn-install.sh b/openvpn-install.sh index 61df7a3..782f3db 100755 --- a/openvpn-install.sh +++ b/openvpn-install.sh @@ -852,44 +852,63 @@ verb 3" >> /etc/openvpn/server.conf installUnbound fi - # Add iptables rules in two scripts - mkdir /etc/iptables + # Add firewall rules --> firewalld / iptable (systemd scripts) + if pgrep firewalld; then + # Allow incoming traffic + if [[ "$PORT" == '1194' ]]; then + firewall-cmd --zone=public --add-service=openvpn + firewall-cmd --permanent --zone=public --add-service=openvpn + else + firewall-cmd --zone=public --add-port=$PORT/$PROTOCOL + firewall-cmd --permanent --zone=public --add-port=$PORT/$PROTOCOL + fi + + # Add trusted zone + firewall-cmd --zone=trusted --add-source=10.8.0.0/24 + firewall-cmd --permanent --zone=trusted --add-source=10.8.0.0/24 - # Script to add rules - echo "#!/bin/sh + # Set NAT for the VPN subnet + firewall-cmd --direct --add-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $IP + firewall-cmd --permanent --direct --add-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $IP + else + # 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 $NIC -j MASQUERADE + if [[ "$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 + # 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 $NIC -j MASQUERADE + if [[ "$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 $NIC -j ACCEPT" >> /etc/iptables/rm-openvpn-rules.sh - fi + fi - chmod +x /etc/iptables/add-openvpn-rules.sh - chmod +x /etc/iptables/rm-openvpn-rules.sh + chmod +x /etc/iptables/add-openvpn-rules.sh + chmod +x /etc/iptables/rm-openvpn-rules.sh - # Handle the rules via a systemd script - echo "[Unit] + # Handle the rules via a systemd script + echo "[Unit] Description=iptables rules for OpenVPN Before=network-online.target Wants=network-online.target @@ -903,10 +922,11 @@ RemainAfterExit=yes [Install] WantedBy=multi-user.target" > /etc/systemd/system/iptables-openvpn.service - # Enable service and apply rules - systemctl daemon-reload - systemctl enable iptables-openvpn - systemctl start iptables-openvpn + # Enable service and apply rules + systemctl daemon-reload + systemctl enable iptables-openvpn + systemctl start iptables-openvpn + fi # If the server is behind a NAT, use the correct IP address for the clients to connect to if [[ "$ENDPOINT" != "" ]]; then @@ -1105,8 +1125,9 @@ function removeOpenVPN () { echo "" read -rp "Do you really want to remove OpenVPN? [y/n]: " -e -i n REMOVE if [[ "$REMOVE" = 'y' ]]; then - # Get OpenVPN port from the configuration + # Get OpenVPN port and protocol from the configuration PORT=$(grep '^port ' /etc/openvpn/server.conf | cut -d " " -f 2) + PROTOCOL=$(grep '^proto ' /etc/openvpn/server.conf | cut -d " " -f 2) # Stop OpenVPN if [[ "$OS" =~ (fedora|arch) ]]; then @@ -1124,14 +1145,34 @@ function removeOpenVPN () { 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 + # Remove firewall rules --> firewalld / iptable (systemd scripts) + if pgrep firewalld; then + IP=$(firewall-cmd --direct --get-rules ipv4 nat POSTROUTING | grep '\-s 10.8.0.0/24 '"'"'!'"'"' -d 10.8.0.0/24 -j SNAT --to ' | cut -d " " -f 10) + + if [[ "$PORT" == '1194' ]]; then + firewall-cmd --zone=public --remove-service=openvpn + firewall-cmd --permanent --zone=public --remove-service=openvpn + else + firewall-cmd --zone=public --remove-port=$PORT/$PROTOCOL + firewall-cmd --permanent --zone=public --remove-port=$PORT/$PROTOCOL + fi + + firewall-cmd --zone=trusted --remove-source=10.8.0.0/24 + firewall-cmd --permanent --zone=trusted --remove-source=10.8.0.0/24 + + firewall-cmd --direct --remove-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $IP + firewall-cmd --permanent --direct --remove-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $IP + else + # 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 + fi # SELinux if hash sestatus 2>/dev/null; then