mirror of
https://github.com/angristan/wireguard-install.git
synced 2024-11-01 11:12:31 +00:00
275 lines
9.5 KiB
Bash
275 lines
9.5 KiB
Bash
#!/bin/bash
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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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elif [[ -e /etc/fedora-release ]]; then
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source /etc/os-release
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OS=$ID
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elif [[ -e /etc/centos-release ]]; then
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OS=centos
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elif [[ -e /etc/arch-release ]]; then
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OS=arch
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else
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echo "Looks like you aren't running this installer on a Debian, Ubuntu, Fedora, CentOS or Arch Linux system"
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exit 1
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fi
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}
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function initialCheck() {
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isRoot
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checkVirt
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checkOS
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}
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function installWireGuard() {
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echo "Welcome to the WireGuard installer!"
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echo "The git repository is available at: https://github.com/angristan/wireguard-install"
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echo ""
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echo "I need to ask you a few questions before starting the setup."
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echo "You can leave the default options and just press enter if you are ok with them."
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# Detect public IPv4 or IPv6 address and pre-fill for the user
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SERVER_PUB_IP=$(ip -4 addr | sed -ne 's|^.* inet \([^/]*\)/.* scope global.*$|\1|p' | 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_PUB_NIC="$(ip -4 route ls | grep default | grep -Po '(?<=dev )(\S+)' | head -1)"
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read -rp "Public interface: " -e -i "$SERVER_PUB_NIC" SERVER_PUB_NIC
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SERVER_WG_NIC="wg0"
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read -rp "WireGuard interface name: " -e -i "$SERVER_WG_NIC" SERVER_WG_NIC
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SERVER_WG_IPV4="10.66.66.1"
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read -rp "Server's WireGuard IPv4: " -e -i "$SERVER_WG_IPV4" SERVER_WG_IPV4
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SERVER_WG_IPV6="fd42:42:42::1"
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read -rp "Server's WireGuard IPv6: " -e -i "$SERVER_WG_IPV6" SERVER_WG_IPV6
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# Generate random number within private ports range
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SERVER_PORT=$(shuf -i49152-65535 -n1)
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read -rp "Server's WireGuard port: " -e -i "$SERVER_PORT" SERVER_PORT
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# Install WireGuard tools and module
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if [[ $OS == 'ubuntu' ]]; then
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apt-get install -y software-properties-common
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add-apt-repository -y ppa:wireguard/wireguard
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apt-get update
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apt-get install -y "linux-headers-$(uname -r)"
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apt-get install -y wireguard iptables resolvconf qrencode
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elif [[ $OS == 'debian' ]]; then
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echo "deb http://deb.debian.org/debian/ unstable main" >/etc/apt/sources.list.d/unstable.list
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printf 'Package: *\nPin: release a=unstable\nPin-Priority: 90\n' >/etc/apt/preferences.d/limit-unstable
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apt update
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apt-get install -y "linux-headers-$(uname -r)"
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apt-get install -y wireguard iptables resolvconf qrencode
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apt-get install -y bc # mitigate https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=956869
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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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curl -Lo /etc/yum.repos.d/wireguard.repo https://copr.fedorainfracloud.org/coprs/jdoss/wireguard/repo/epel-7/jdoss-wireguard-epel-7.repo
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yum -y install epel-release
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yum -y install wireguard-dkms wireguard-tools iptables qrencode
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elif [[ $OS == 'arch' ]]; then
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pacman -S --noconfirm linux-headers
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pacman -S --noconfirm wireguard-tools iptables qrencode
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fi
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# Make sure the directory exists (this does not seem the be the case on fedora)
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mkdir /etc/wireguard >/dev/null 2>&1
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chmod 600 -R /etc/wireguard/
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SERVER_PRIV_KEY=$(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" >/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 [ -x "$(command -v firewall-cmd)" ]; then
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FIREWALLD_IPV4_ADDRESS=$(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_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_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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# 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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# Warn user about kernel version mismatch with headers
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if [[ $OS =~ (fedora|centos) ]] && [[ $WG_RUNNING -ne 0 ]]; then
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echo -e "\nWARNING: WireGuard does not seem to be running."
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echo "Due to kernel mismatch issues on $OS, WireGuard might work if your system is out of date."
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echo "You can check if WireGuard is running with: systemctl status wg-quick@$SERVER_WG_NIC"
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echo 'If you get something like "Cannot find device wg0", please run:'
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if [[ $OS == 'fedora' ]]; then
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echo "dnf update -y && reboot"
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elif [[ $OS == 'centos' ]]; then
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echo "yum update -y && reboot"
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fi
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fi
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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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}
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function newClient() {
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# Load params
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source /etc/wireguard/params
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if [[ $SERVER_PUB_IP =~ .*:.* ]]; then
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echo "IPv6 Detected"
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ENDPOINT="[$SERVER_PUB_IP]:$SERVER_PORT"
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else
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echo "IPv4 Detected"
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ENDPOINT="$SERVER_PUB_IP:$SERVER_PORT"
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fi
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until [[ "$CLIENT_WG_IPV4" =~ ^([0-9]{1,3}\.?){4}$ ]]; do
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read -rp "Client's WireGuard IPv4: " -e -i 10.66.66.2 CLIENT_WG_IPV4
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done
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until [[ "$CLIENT_WG_IPV6" =~ ^([a-f0-9]{1,4}:?:?){3,5} ]]; do
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read -rp "Client's WireGuard IPv6 : " -e -i fd42:42:42::2 CLIENT_WG_IPV6
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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 client: " -e -i 176.103.130.130 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 client (optional): " -e -i 176.103.130.131 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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CLIENT_NAME=$(
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head /dev/urandom | tr -dc A-Za-z0-9 | head -c 10
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echo ''
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)
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# Generate key pair for the client
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CLIENT_PRIV_KEY=$(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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# 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 = $CLIENT_WG_IPV4/24,$CLIENT_WG_IPV6/64
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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/$SERVER_WG_NIC-client-$CLIENT_NAME.conf"
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# Add the client as a peer to the server
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echo -e "\n[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/$SERVER_WG_NIC.conf"
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systemctl restart "wg-quick@$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 <"$HOME/$SERVER_WG_NIC-client-$CLIENT_NAME.conf"
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echo "It is also available in $HOME/$SERVER_WG_NIC-client-$CLIENT_NAME.conf"
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}
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function manageMenu() {
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echo "Welcome to WireGuard-install!"
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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 "It looks like WireGuard is already installed."
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echo ""
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echo "What do you want to do?"
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echo " 1) Add a new user"
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echo " 2) Exit"
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until [[ $MENU_OPTION =~ ^[1-2]$ ]]; do
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read -rp "Select an option [1-2]: " MENU_OPTION
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done
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case $MENU_OPTION in
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1)
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newClient
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;;
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2)
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exit 0
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;;
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esac
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}
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# Check for root, virt, OS...
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initialCheck
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# Check if WireGuard is already installed
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if [[ -e /etc/wireguard/params ]]; then
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manageMenu
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else
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installWireGuard
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fi
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