mirror of
https://github.com/angristan/wireguard-install.git
synced 2024-10-31 18:52:31 +00:00
456 lines
15 KiB
Bash
456 lines
15 KiB
Bash
#!/bin/bash
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# Secure WireGuard server installer
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# https://github.com/angristan/wireguard-install
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RED='\033[0;31m'
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ORANGE='\033[0;33m'
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NC='\033[0m'
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function isRoot() {
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if [ "${EUID}" -ne 0 ]; then
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echo "You need to run this script as root"
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exit 1
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fi
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}
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function checkVirt() {
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if [ "$(systemd-detect-virt)" == "openvz" ]; then
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echo "OpenVZ is not supported"
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exit 1
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fi
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if [ "$(systemd-detect-virt)" == "lxc" ]; then
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echo "LXC is not supported (yet)."
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echo "WireGuard can technically run in an LXC container,"
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echo "but the kernel module has to be installed on the host,"
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echo "the container has to be run with some specific parameters"
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echo "and only the tools need to be installed in the container."
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exit 1
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fi
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}
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function checkOS() {
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# Check OS version
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if [[ -e /etc/debian_version ]]; then
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source /etc/os-release
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OS="${ID}" # debian or ubuntu
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if [[ ${ID} == "debian" || ${ID} == "raspbian" ]]; then
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if [[ ${VERSION_ID} -lt 10 ]]; then
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echo "Your version of Debian (${VERSION_ID}) is not supported. Please use Debian 10 Buster or later"
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exit 1
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fi
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OS=debian # overwrite if raspbian
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fi
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elif [[ -e /etc/fedora-release ]]; then
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source /etc/os-release
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OS="${ID}"
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elif [[ -e /etc/centos-release ]]; then
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source /etc/os-release
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OS=centos
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elif [[ -e /etc/oracle-release ]]; then
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source /etc/os-release
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OS=oracle
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elif [[ -e /etc/arch-release ]]; then
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OS=arch
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else
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echo "Looks like you aren't running this installer on a Debian, Ubuntu, Fedora, CentOS, Oracle or Arch Linux system"
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exit 1
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fi
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}
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function initialCheck() {
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isRoot
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checkVirt
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checkOS
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}
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function installQuestions() {
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echo "Welcome to the WireGuard installer!"
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echo "The git repository is available at: https://github.com/angristan/wireguard-install"
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echo ""
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echo "I need to ask you a few questions before starting the setup."
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echo "You can leave the default options and just press enter if you are ok with them."
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echo ""
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# Detect public IPv4 or IPv6 address and pre-fill for the user
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SERVER_PUB_IP=$(ip -4 addr | sed -ne 's|^.* inet \([^/]*\)/.* scope global.*$|\1|p' | awk '{print $1}' | head -1)
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if [[ -z ${SERVER_PUB_IP} ]]; then
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# Detect public IPv6 address
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SERVER_PUB_IP=$(ip -6 addr | sed -ne 's|^.* inet6 \([^/]*\)/.* scope global.*$|\1|p' | head -1)
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fi
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read -rp "IPv4 or IPv6 public address: " -e -i "${SERVER_PUB_IP}" SERVER_PUB_IP
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# Detect public interface and pre-fill for the user
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SERVER_NIC="$(ip -4 route ls | grep default | grep -Po '(?<=dev )(\S+)' | head -1)"
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until [[ ${SERVER_PUB_NIC} =~ ^[a-zA-Z0-9_]+$ ]]; do
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read -rp "Public interface: " -e -i "${SERVER_NIC}" SERVER_PUB_NIC
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done
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until [[ ${SERVER_WG_NIC} =~ ^[a-zA-Z0-9_]+$ && ${#SERVER_WG_NIC} -lt 16 ]]; do
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read -rp "WireGuard interface name: " -e -i wg0 SERVER_WG_NIC
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done
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until [[ ${SERVER_WG_IPV4} =~ ^([0-9]{1,3}\.){3} ]]; do
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read -rp "Server's WireGuard IPv4: " -e -i 10.66.66.1 SERVER_WG_IPV4
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done
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until [[ ${SERVER_WG_IPV6} =~ ^([a-f0-9]{1,4}:){3,4}: ]]; do
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read -rp "Server's WireGuard IPv6: " -e -i fd42:42:42::1 SERVER_WG_IPV6
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done
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# Generate random number within private ports range
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RANDOM_PORT=$(shuf -i49152-65535 -n1)
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until [[ ${SERVER_PORT} =~ ^[0-9]+$ ]] && [ "${SERVER_PORT}" -ge 1 ] && [ "${SERVER_PORT}" -le 65535 ]; do
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read -rp "Server's WireGuard port [1-65535]: " -e -i "${RANDOM_PORT}" SERVER_PORT
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done
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# Adguard DNS by default
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until [[ ${CLIENT_DNS_1} =~ ^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$ ]]; do
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read -rp "First DNS resolver to use for the clients: " -e -i 94.140.14.14 CLIENT_DNS_1
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done
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until [[ ${CLIENT_DNS_2} =~ ^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$ ]]; do
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read -rp "Second DNS resolver to use for the clients (optional): " -e -i 94.140.15.15 CLIENT_DNS_2
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if [[ ${CLIENT_DNS_2} == "" ]]; then
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CLIENT_DNS_2="${CLIENT_DNS_1}"
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fi
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done
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echo ""
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echo "Okay, that was all I needed. We are ready to setup your WireGuard server now."
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echo "You will be able to generate a client at the end of the installation."
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read -n1 -r -p "Press any key to continue..."
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}
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function installWireGuard() {
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# Run setup questions first
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installQuestions
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# Install WireGuard tools and module
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if [[ ${OS} == 'ubuntu' ]] || [[ ${OS} == 'debian' && ${VERSION_ID} -gt 10 ]]; then
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apt-get update
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apt-get install -y wireguard iptables resolvconf qrencode
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elif [[ ${OS} == 'debian' ]]; then
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if ! grep -rqs "^deb .* buster-backports" /etc/apt/; then
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echo "deb http://deb.debian.org/debian buster-backports main" >/etc/apt/sources.list.d/backports.list
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apt-get update
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fi
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apt update
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apt-get install -y iptables resolvconf qrencode
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apt-get install -y -t buster-backports wireguard
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elif [[ ${OS} == 'fedora' ]]; then
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if [[ ${VERSION_ID} -lt 32 ]]; then
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dnf install -y dnf-plugins-core
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dnf copr enable -y jdoss/wireguard
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dnf install -y wireguard-dkms
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fi
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dnf install -y wireguard-tools iptables qrencode
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elif [[ ${OS} == 'centos' ]]; then
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yum -y install epel-release elrepo-release
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if [[ ${VERSION_ID} -eq 7 ]]; then
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yum -y install yum-plugin-elrepo
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fi
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yum -y install kmod-wireguard wireguard-tools iptables qrencode
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elif [[ ${OS} == 'oracle' ]]; then
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dnf install -y oraclelinux-developer-release-el8
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dnf config-manager --disable -y ol8_developer
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dnf config-manager --enable -y ol8_developer_UEKR6
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dnf config-manager --save -y --setopt=ol8_developer_UEKR6.includepkgs='wireguard-tools*'
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dnf install -y wireguard-tools qrencode iptables
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elif [[ ${OS} == 'arch' ]]; then
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pacman -S --needed --noconfirm wireguard-tools qrencode
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fi
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# Make sure the directory exists (this does not seem the be the case on fedora)
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mkdir /etc/wireguard >/dev/null 2>&1
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chmod 600 -R /etc/wireguard/
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SERVER_PRIV_KEY=$(wg genkey)
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SERVER_PUB_KEY=$(echo "${SERVER_PRIV_KEY}" | wg pubkey)
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# Save WireGuard settings
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echo "SERVER_PUB_IP=${SERVER_PUB_IP}
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SERVER_PUB_NIC=${SERVER_PUB_NIC}
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SERVER_WG_NIC=${SERVER_WG_NIC}
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SERVER_WG_IPV4=${SERVER_WG_IPV4}
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SERVER_WG_IPV6=${SERVER_WG_IPV6}
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SERVER_PORT=${SERVER_PORT}
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SERVER_PRIV_KEY=${SERVER_PRIV_KEY}
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SERVER_PUB_KEY=${SERVER_PUB_KEY}
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CLIENT_DNS_1=${CLIENT_DNS_1}
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CLIENT_DNS_2=${CLIENT_DNS_2}" >/etc/wireguard/params
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# Add server interface
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echo "[Interface]
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Address = ${SERVER_WG_IPV4}/24,${SERVER_WG_IPV6}/64
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ListenPort = ${SERVER_PORT}
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PrivateKey = ${SERVER_PRIV_KEY}" >"/etc/wireguard/${SERVER_WG_NIC}.conf"
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if pgrep firewalld; then
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FIREWALLD_IPV4_ADDRESS=$(echo "${SERVER_WG_IPV4}" | cut -d"." -f1-3)".0"
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FIREWALLD_IPV6_ADDRESS=$(echo "${SERVER_WG_IPV6}" | sed 's/:[^:]*$/:0/')
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echo "PostUp = firewall-cmd --add-port ${SERVER_PORT}/udp && firewall-cmd --add-rich-rule='rule family=ipv4 source address=${FIREWALLD_IPV4_ADDRESS}/24 masquerade' && firewall-cmd --add-rich-rule='rule family=ipv6 source address=${FIREWALLD_IPV6_ADDRESS}/24 masquerade'
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PostDown = firewall-cmd --remove-port ${SERVER_PORT}/udp && firewall-cmd --remove-rich-rule='rule family=ipv4 source address=${FIREWALLD_IPV4_ADDRESS}/24 masquerade' && firewall-cmd --remove-rich-rule='rule family=ipv6 source address=${FIREWALLD_IPV6_ADDRESS}/24 masquerade'" >>"/etc/wireguard/${SERVER_WG_NIC}.conf"
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else
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echo "PostUp = iptables -A FORWARD -i ${SERVER_PUB_NIC} -o ${SERVER_WG_NIC} -j ACCEPT; iptables -A FORWARD -i ${SERVER_WG_NIC} -j ACCEPT; iptables -t nat -A POSTROUTING -o ${SERVER_PUB_NIC} -j MASQUERADE; ip6tables -A FORWARD -i ${SERVER_WG_NIC} -j ACCEPT; ip6tables -t nat -A POSTROUTING -o ${SERVER_PUB_NIC} -j MASQUERADE
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PostDown = iptables -D FORWARD -i ${SERVER_PUB_NIC} -o ${SERVER_WG_NIC} -j ACCEPT; iptables -D FORWARD -i ${SERVER_WG_NIC} -j ACCEPT; iptables -t nat -D POSTROUTING -o ${SERVER_PUB_NIC} -j MASQUERADE; ip6tables -D FORWARD -i ${SERVER_WG_NIC} -j ACCEPT; ip6tables -t nat -D POSTROUTING -o ${SERVER_PUB_NIC} -j MASQUERADE" >>"/etc/wireguard/${SERVER_WG_NIC}.conf"
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fi
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# Enable routing on the server
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echo "net.ipv4.ip_forward = 1
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net.ipv6.conf.all.forwarding = 1" >/etc/sysctl.d/wg.conf
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sysctl --system
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systemctl start "wg-quick@${SERVER_WG_NIC}"
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systemctl enable "wg-quick@${SERVER_WG_NIC}"
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newClient
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echo "If you want to add more clients, you simply need to run this script another time!"
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# Check if WireGuard is running
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systemctl is-active --quiet "wg-quick@${SERVER_WG_NIC}"
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WG_RUNNING=$?
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# WireGuard might not work if we updated the kernel. Tell the user to reboot
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if [[ ${WG_RUNNING} -ne 0 ]]; then
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echo -e "\n${RED}WARNING: WireGuard does not seem to be running.${NC}"
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echo -e "${ORANGE}You can check if WireGuard is running with: systemctl status wg-quick@${SERVER_WG_NIC}${NC}"
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echo -e "${ORANGE}If you get something like \"Cannot find device ${SERVER_WG_NIC}\", please reboot!${NC}"
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fi
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}
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function newClient() {
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ENDPOINT="${SERVER_PUB_IP}:${SERVER_PORT}"
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echo ""
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echo "Tell me a name for the client."
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echo "The name must consist of alphanumeric character. It may also include an underscore or a dash and can't exceed 15 chars."
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until [[ ${CLIENT_NAME} =~ ^[a-zA-Z0-9_-]+$ && ${CLIENT_EXISTS} == '0' && ${#CLIENT_NAME} -lt 16 ]]; do
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read -rp "Client name: " -e CLIENT_NAME
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CLIENT_EXISTS=$(grep -c -E "^### Client ${CLIENT_NAME}\$" "/etc/wireguard/${SERVER_WG_NIC}.conf")
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if [[ ${CLIENT_EXISTS} == '1' ]]; then
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echo ""
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echo "A client with the specified name was already created, please choose another name."
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echo ""
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fi
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done
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for DOT_IP in {2..254}; do
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DOT_EXISTS=$(grep -c "${SERVER_WG_IPV4::-1}${DOT_IP}" "/etc/wireguard/${SERVER_WG_NIC}.conf")
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if [[ ${DOT_EXISTS} == '0' ]]; then
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break
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fi
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done
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if [[ ${DOT_EXISTS} == '1' ]]; then
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echo ""
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echo "The subnet configured supports only 253 clients."
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exit 1
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fi
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BASE_IP=$(echo "$SERVER_WG_IPV4" | awk -F '.' '{ print $1"."$2"."$3 }')
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until [[ ${IPV4_EXISTS} == '0' ]]; do
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read -rp "Client's WireGuard IPv4: ${BASE_IP}." -e -i "${DOT_IP}" DOT_IP
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CLIENT_WG_IPV4="${BASE_IP}.${DOT_IP}"
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IPV4_EXISTS=$(grep -c "$CLIENT_WG_IPV4/24" "/etc/wireguard/${SERVER_WG_NIC}.conf")
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if [[ ${IPV4_EXISTS} == '1' ]]; then
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echo ""
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echo "A client with the specified IPv4 was already created, please choose another IPv4."
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echo ""
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fi
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done
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BASE_IP=$(echo "$SERVER_WG_IPV6" | awk -F '::' '{ print $1 }')
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until [[ ${IPV6_EXISTS} == '0' ]]; do
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read -rp "Client's WireGuard IPv6: ${BASE_IP}::" -e -i "${DOT_IP}" DOT_IP
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CLIENT_WG_IPV6="${BASE_IP}::${DOT_IP}"
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IPV6_EXISTS=$(grep -c "${CLIENT_WG_IPV6}/64" "/etc/wireguard/${SERVER_WG_NIC}.conf")
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if [[ ${IPV6_EXISTS} == '1' ]]; then
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echo ""
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echo "A client with the specified IPv6 was already created, please choose another IPv6."
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echo ""
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fi
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done
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# Generate key pair for the client
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CLIENT_PRIV_KEY=$(wg genkey)
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CLIENT_PUB_KEY=$(echo "${CLIENT_PRIV_KEY}" | wg pubkey)
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CLIENT_PRE_SHARED_KEY=$(wg genpsk)
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# Home directory of the user, where the client configuration will be written
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if [ -e "/home/${CLIENT_NAME}" ]; then
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# if $1 is a user name
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HOME_DIR="/home/${CLIENT_NAME}"
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elif [ "${SUDO_USER}" ]; then
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# if not, use SUDO_USER
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if [ "${SUDO_USER}" == "root" ]; then
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# If running sudo as root
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HOME_DIR="/root"
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else
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HOME_DIR="/home/${SUDO_USER}"
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fi
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else
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# if not SUDO_USER, use /root
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HOME_DIR="/root"
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fi
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# Create client file and add the server as a peer
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echo "[Interface]
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PrivateKey = ${CLIENT_PRIV_KEY}
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Address = ${CLIENT_WG_IPV4}/32,${CLIENT_WG_IPV6}/128
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DNS = ${CLIENT_DNS_1},${CLIENT_DNS_2}
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[Peer]
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PublicKey = ${SERVER_PUB_KEY}
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PresharedKey = ${CLIENT_PRE_SHARED_KEY}
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Endpoint = ${ENDPOINT}
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AllowedIPs = 0.0.0.0/0,::/0" >>"${HOME_DIR}/${SERVER_WG_NIC}-client-${CLIENT_NAME}.conf"
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# Add the client as a peer to the server
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echo -e "\n### Client ${CLIENT_NAME}
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[Peer]
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PublicKey = ${CLIENT_PUB_KEY}
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PresharedKey = ${CLIENT_PRE_SHARED_KEY}
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AllowedIPs = ${CLIENT_WG_IPV4}/32,${CLIENT_WG_IPV6}/128" >>"/etc/wireguard/${SERVER_WG_NIC}.conf"
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wg syncconf "${SERVER_WG_NIC}" <(wg-quick strip "${SERVER_WG_NIC}")
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echo -e "\nHere is your client config file as a QR Code:"
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qrencode -t ansiutf8 -l L <"${HOME_DIR}/${SERVER_WG_NIC}-client-${CLIENT_NAME}.conf"
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echo "It is also available in ${HOME_DIR}/${SERVER_WG_NIC}-client-${CLIENT_NAME}.conf"
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}
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function revokeClient() {
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NUMBER_OF_CLIENTS=$(grep -c -E "^### Client" "/etc/wireguard/${SERVER_WG_NIC}.conf")
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if [[ ${NUMBER_OF_CLIENTS} == '0' ]]; then
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echo ""
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echo "You have no existing clients!"
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exit 1
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fi
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echo ""
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echo "Select the existing client you want to revoke"
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grep -E "^### Client" "/etc/wireguard/${SERVER_WG_NIC}.conf" | cut -d ' ' -f 3 | nl -s ') '
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until [[ ${CLIENT_NUMBER} -ge 1 && ${CLIENT_NUMBER} -le ${NUMBER_OF_CLIENTS} ]]; do
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if [[ ${CLIENT_NUMBER} == '1' ]]; then
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read -rp "Select one client [1]: " CLIENT_NUMBER
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else
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read -rp "Select one client [1-${NUMBER_OF_CLIENTS}]: " CLIENT_NUMBER
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fi
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done
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# match the selected number to a client name
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CLIENT_NAME=$(grep -E "^### Client" "/etc/wireguard/${SERVER_WG_NIC}.conf" | cut -d ' ' -f 3 | sed -n "${CLIENT_NUMBER}"p)
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# remove [Peer] block matching $CLIENT_NAME
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sed -i "/^### Client ${CLIENT_NAME}\$/,/^$/d" "/etc/wireguard/${SERVER_WG_NIC}.conf"
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# remove generated client file
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rm -f "${HOME}/${SERVER_WG_NIC}-client-${CLIENT_NAME}.conf"
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# restart wireguard to apply changes
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wg syncconf "${SERVER_WG_NIC}" <(wg-quick strip "${SERVER_WG_NIC}")
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}
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function uninstallWg() {
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echo ""
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read -rp "Do you really want to remove WireGuard? [y/n]: " -e -i n REMOVE
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if [[ $REMOVE == 'y' ]]; then
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checkOS
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systemctl stop "wg-quick@${SERVER_WG_NIC}"
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systemctl disable "wg-quick@${SERVER_WG_NIC}"
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if [[ ${OS} == 'ubuntu' ]]; then
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apt-get autoremove --purge -y wireguard qrencode
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elif [[ ${OS} == 'debian' ]]; then
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apt-get autoremove --purge -y wireguard qrencode
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elif [[ ${OS} == 'fedora' ]]; then
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dnf remove -y wireguard-tools qrencode
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if [[ ${VERSION_ID} -lt 32 ]]; then
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dnf remove -y wireguard-dkms
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dnf copr disable -y jdoss/wireguard
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fi
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dnf autoremove -y
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elif [[ ${OS} == 'centos' ]]; then
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yum -y remove kmod-wireguard wireguard-tools qrencode
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yum -y autoremove
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elif [[ ${OS} == 'oracle' ]]; then
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yum -y remove wireguard-tools qrencode
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yum -y autoremove
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elif [[ ${OS} == 'arch' ]]; then
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pacman -Rs --noconfirm wireguard-tools qrencode
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fi
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rm -rf /etc/wireguard
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rm -f /etc/sysctl.d/wg.conf
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# Reload sysctl
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sysctl --system
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# Check if WireGuard is running
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systemctl is-active --quiet "wg-quick@${SERVER_WG_NIC}"
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WG_RUNNING=$?
|
|
|
|
if [[ ${WG_RUNNING} -eq 0 ]]; then
|
|
echo "WireGuard failed to uninstall properly."
|
|
exit 1
|
|
else
|
|
echo "WireGuard uninstalled successfully."
|
|
exit 0
|
|
fi
|
|
else
|
|
echo ""
|
|
echo "Removal aborted!"
|
|
fi
|
|
}
|
|
|
|
function manageMenu() {
|
|
echo "Welcome to WireGuard-install!"
|
|
echo "The git repository is available at: https://github.com/angristan/wireguard-install"
|
|
echo ""
|
|
echo "It looks like WireGuard is already installed."
|
|
echo ""
|
|
echo "What do you want to do?"
|
|
echo " 1) Add a new user"
|
|
echo " 2) Revoke existing user"
|
|
echo " 3) Uninstall WireGuard"
|
|
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)
|
|
uninstallWg
|
|
;;
|
|
4)
|
|
exit 0
|
|
;;
|
|
esac
|
|
}
|
|
|
|
# Check for root, virt, OS...
|
|
initialCheck
|
|
|
|
# Check if WireGuard is already installed and load params
|
|
if [[ -e /etc/wireguard/params ]]; then
|
|
source /etc/wireguard/params
|
|
manageMenu
|
|
else
|
|
installWireGuard
|
|
fi
|