From 941f27bd2f200953e728e893e7a19b54340bdb20 Mon Sep 17 00:00:00 2001 From: Nyr Date: Thu, 30 Apr 2020 20:26:38 +0200 Subject: [PATCH] First commit --- LICENSE.txt | 20 ++ README.md | 18 ++ wireguard-install.sh | 564 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 602 insertions(+) create mode 100644 LICENSE.txt create mode 100644 README.md create mode 100644 wireguard-install.sh diff --git a/LICENSE.txt b/LICENSE.txt new file mode 100644 index 0000000..9157d9c --- /dev/null +++ b/LICENSE.txt @@ -0,0 +1,20 @@ +The MIT License (MIT) + +Copyright (c) 2020 Nyr + +Permission is hereby granted, free of charge, to any person obtaining a copy of +this software and associated documentation files (the "Software"), to deal in +the Software without restriction, including without limitation the rights to +use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of +the Software, and to permit persons to whom the Software is furnished to do so, +subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS +FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR +COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER +IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. diff --git a/README.md b/README.md new file mode 100644 index 0000000..c9354fb --- /dev/null +++ b/README.md @@ -0,0 +1,18 @@ +## wireguard-install +WireGuard [road warrior](http://en.wikipedia.org/wiki/Road_warrior_%28computing%29) installer for Ubuntu, Debian, CentOS and Fedora. + +This script will let you set up your own VPN server in no more than a minute, even if you haven't used WireGuard before. It has been designed to be as unobtrusive and universal as possible. + +### Installation +Run the script and follow the assistant: + +`wget https://git.io/wireguard -O wireguard-install.sh && bash wireguard-install.sh` + +Once it ends, you can run it again to add more users, remove some of them or even completely uninstall WireGuard. + +### I want to run my own VPN but don't have a server for that +You can get a VPS from just $1/month at [VirMach](https://billing.virmach.com/aff.php?aff=4109&url=billing.virmach.com/cart.php?gid=18). + +### Donations + +If you want to show your appreciation, you can donate via [PayPal](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=VBAYDL34Z7J6L) or [cryptocurrency](https://pastebin.com/raw/M2JJpQpC). Thanks! diff --git a/wireguard-install.sh b/wireguard-install.sh new file mode 100644 index 0000000..9bf9555 --- /dev/null +++ b/wireguard-install.sh @@ -0,0 +1,564 @@ +#!/bin/bash +# +# https://github.com/Nyr/wireguard-install +# +# Copyright (c) 2020 Nyr. Released under the MIT License. + + +# Detect Debian users running the script with "sh" instead of bash +if readlink /proc/$$/exe | grep -q "dash"; then + echo "This script needs to be run with bash, not sh" + exit +fi + +if [[ "$EUID" -ne 0 ]]; then + echo "Sorry, you need to run this as root" + exit +fi + +# If running inside a container, do nothing +if systemd-detect-virt -cq 2>/dev/null; then + echo "You are running this script inside a $(systemd-detect-virt) container +We are unable to load the WireGuard kernel module and setup can't continue" + exit +fi + +# Detect OS +# $os_version variables aren't always in use, but are kept here for convenience +if grep -qs "ubuntu" /etc/os-release; then + os="ubuntu" + os_version=$(grep 'VERSION_ID' /etc/os-release | cut -d '"' -f 2 | tr -d '.') + group_name="nogroup" +elif [[ -e /etc/debian_version ]]; then + os="debian" + os_version=$(grep -oE '[0-9]+' /etc/debian_version | head -1) + group_name="nogroup" +elif [[ -e /etc/centos-release ]]; then + os="centos" + os_version=$(grep -oE '[0-9]+' /etc/centos-release | head -1) + group_name="nobody" +elif [[ -e /etc/fedora-release ]]; then + os="fedora" + os_version=$(grep -oE '[0-9]+' /etc/fedora-release | head -1) + group_name="nobody" +else + echo "Looks like you aren't running this installer on Ubuntu, Debian, CentOS or Fedora" + exit +fi + +if [[ "$os" == "ubuntu" && "$os_version" -lt 1804 ]]; then + echo "Ubuntu 18.04 or higher is required to use this installer +This version of Ubuntu is too old and unsupported" + exit +fi + +if [[ "$os" == "debian" && "$os_version" -lt 10 ]]; then + echo "Debian 10 or higher is required to use this installer +This version of Debian is too old and unsupported" + exit +fi + +if [[ "$os" == "centos" && "$os_version" -lt 7 ]]; then + echo "CentOS 7 or higher is required to use this installer +This version of CentOS is too old and unsupported" + exit +fi + +if [[ "$os" == "fedora" && "$os_version" -eq 31 && $(uname -r | cut -d "." -f 2) -lt 6 ]]; then + echo 'Fedora 31 is supported, but your kernel is outdated +Upgrade the kernel using "dnf upgrade kernel" and restart' + exit +fi + +new_client_dns () { + echo "Which DNS do you want to use for this client?" + echo " 1) Current system resolvers" + echo " 2) 1.1.1.1" + echo " 3) Google" + echo " 4) OpenDNS" + echo " 5) NTT" + echo " 6) AdGuard" + read -p "DNS [1]: " dns + until [[ -z "$dns" || "$dns" =~ ^[1-6]$ ]]; do + echo "$dns: invalid selection." + read -p "DNS [1]: " dns + done + # DNS + case "$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 + resolv_conf="/run/systemd/resolve/resolv.conf" + else + resolv_conf="/etc/resolv.conf" + fi + # Extract nameservers and provide them in the required format + dns=$(grep -v '#' "$resolv_conf" | grep nameserver | grep -E -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | xargs | sed -e 's/ /, /g') + ;; + 2) + dns="1.1.1.1, 1.0.0.1" + ;; + 3) + dns="8.8.8.8, 8.8.4.4" + ;; + 4) + dns="208.67.222.222, 208.67.220.220" + ;; + 5) + dns="129.250.35.250, 129.250.35.251" + ;; + 6) + dns="176.103.130.130, 176.103.130.131" + ;; + esac +} + +new_client_setup () { + # Given a list of the assigned internal IPv4 addresses, obtain the lowest still + # available octet. Important to start looking at 2, because 1 is our gateway. + octet=2 + while grep AllowedIPs /etc/wireguard/wg0.conf | cut -d "." -f 4 | cut -d "/" -f 1 | grep -q "$octet"; do + (( octet++ )) + done + # Don't break the WireGuard configuration in case the address space is full + if [[ "$octet" -eq 255 ]]; then + echo "253 clients are already configured. The WireGuard internal subnet is full!" + exit + fi + key=$(wg genkey) + psk=$(wg genpsk) + # Configure client in the server + cat << EOF >> /etc/wireguard/wg0.conf +# BEGIN_PEER $client +[Peer] +PublicKey = $(wg pubkey <<< $key) +PresharedKey = $psk +AllowedIPs = 10.7.0.$octet/32$(grep -q 'fddd:2c4:2c4:2c4::1' /etc/wireguard/wg0.conf && echo ", fddd:2c4:2c4:2c4::$octet/128") +# END_PEER $client +EOF + # Create client configuration + cat << EOF > ~/"$client".conf +[Interface] +Address = 10.7.0.$octet/24$(grep -q 'fddd:2c4:2c4:2c4::1' /etc/wireguard/wg0.conf && echo ", fddd:2c4:2c4:2c4::$octet/64") +DNS = $dns +PrivateKey = $key + +[Peer] +PublicKey = $(grep PrivateKey /etc/wireguard/wg0.conf | cut -d " " -f 3 | wg pubkey) +PresharedKey = $psk +AllowedIPs = 0.0.0.0/0, ::/0 +Endpoint = $(grep '^# ENDPOINT' /etc/wireguard/wg0.conf | cut -d " " -f 3):$(grep ListenPort /etc/wireguard/wg0.conf | cut -d " " -f 3) +PersistentKeepalive = 25 +EOF +} + +if [[ ! -e /etc/wireguard/wg0.conf ]]; then + clear + echo 'Welcome to this WireGuard road warrior installer!' + echo + echo "I need to ask you a few questions before starting setup." + echo "You can use the default options and just press enter if you are ok with them." + # If system has a single IPv4, it is selected automatically. Else, ask the user + if [[ $(ip -4 addr | grep inet | grep -vEc '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}') -eq 1 ]]; then + ip=$(ip -4 addr | grep inet | grep -vE '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}') + else + number_of_ip=$(ip -4 addr | grep inet | grep -vEc '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}') + echo + echo "What IPv4 address should the WireGuard server use?" + ip -4 addr | grep inet | grep -vE '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | nl -s ') ' + read -p "IPv4 address [1]: " ip_number + until [[ -z "$ip_number" || "$ip_number" =~ ^[0-9]+$ && "$ip_number" -le "$number_of_ip" ]]; do + echo "$ip_number: invalid selection." + read -p "IPv4 address [1]: " ip_number + done + [[ -z "$ip_number" ]] && ip_number="1" + ip=$(ip -4 addr | grep inet | grep -vE '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | sed -n "$ip_number"p) + 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 "This server is behind NAT. What is the public IPv4 address or hostname?" + # Get public IP and sanitize with grep + get_public_ip=$(grep -m 1 -oE '^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$' <<< "$(wget -T 10 -t 1 -4qO- "http://ip1.dynupdate.no-ip.com/" || curl -m 10 -4Ls "http://ip1.dynupdate.no-ip.com/")") + read -p "Public IPv4 address / hostname [$get_public_ip]: " public_ip + # If the checkip service is unavailable and user didn't provide input, ask again + until [[ -n "$get_public_ip" || -n $public_ip ]]; do + echo "Invalid input." + read -p "Public IPv4 address / hostname: " public_ip + done + [[ -z "$public_ip" ]] && public_ip="$get_public_ip" + fi + # If system has a single IPv6, it is selected automatically + if [[ $(ip -6 addr | grep -c 'inet6 [23]') -eq 1 ]]; then + ip6=$(ip -6 addr | grep 'inet6 [23]' | cut -d '/' -f 1 | grep -oE '([0-9a-fA-F]{0,4}:){1,7}[0-9a-fA-F]{0,4}') + fi + # If system has multiple IPv6, ask the user to select one + if [[ $(ip -6 addr | grep -c 'inet6 [23]') -gt 1 ]]; then + number_of_ip6=$(ip -6 addr | grep -c 'inet6 [23]') + echo + echo "What IPv6 address should the WireGuard server use?" + ip -6 addr | grep 'inet6 [23]' | cut -d '/' -f 1 | grep -oE '([0-9a-fA-F]{0,4}:){1,7}[0-9a-fA-F]{0,4}' | nl -s ') ' + read -p "IPv6 address [1]: " ip6_number + until [[ -z "$ip6_number" || "$ip6_number" =~ ^[0-9]+$ && "$ip6_number" -le "$number_of_ip6" ]]; do + echo "$ip6_number: invalid selection." + read -p "IPv6 address [1]: " ip6_number + done + [[ -z "$ip6_number" ]] && ip6_number="1" + ip6=$(ip -6 addr | grep 'inet6 [23]' | cut -d '/' -f 1 | grep -oE '([0-9a-fA-F]{0,4}:){1,7}[0-9a-fA-F]{0,4}' | sed -n "$ip6_number"p) + fi + echo + echo "What port do you want WireGuard listening to?" + read -p "Port [51820]: " port + until [[ -z "$port" || "$port" =~ ^[0-9]+$ && "$port" -le 65535 ]]; do + echo "$port: invalid port." + read -p "Port [51820]: " port + done + [[ -z "$port" ]] && port="51820" + echo + echo "Tell me a name for the first client." + read -p "Client name [client]: " unsanitized_client + # Allow a limited set of characters to avoid conflicts + client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client") + [[ -z "$client" ]] && client="client" + echo + new_client_dns + echo + echo "We are ready to set up your WireGuard server now." + # DigitalOcean ships their CentOS and Fedora images without firewalld + # We don't want to silently enable a firewall, so we give a subtle warning + # If the user continues, firewalld will be installed and enabled during setup + if [[ "$os" == "centos" || "$os" == "fedora" ]] && ! systemctl is-active --quiet firewalld.service; then + echo + echo "firewalld, which is required to manage routing tables, will also be installed." + fi + echo + read -n1 -r -p "Press any key to continue..." + # Install WireGuard + if [[ "$os" == "ubuntu" && "$os_version" -ge 2004 ]]; then + # Ubuntu 20.04 or higer + apt-get update + apt-get install -y wireguard qrencode + elif [[ "$os" == "ubuntu" && "$os_version" -eq 1804 ]]; then + # Ubuntu 18.04 + # Repo is added manually so we don't depend on add-apt-repository + apt-key add - << EOF +-----BEGIN PGP PUBLIC KEY BLOCK----- + +xsFNBFgsdJkBEADF7kp11himOaaVQ5rYN05SjdkrNWG2OI+aA8GnBqHk8V9Cjabo +5i+Dof7y6Efcr9kzkHZeRq3sFuyRd4hNBrsTvJbsBkeOZ/O9tUG/hTCBR0E4XHxb +xyXFgdLNvLFKrhcfHo6lPlf5rCGPEp6obuNILh8lzpGKCi1AvC89nCtqZZqeyRKw +MVv1Hf217nDAu3Swgv3iC5a1vncxCni4g5eV2tD8hyCmeIl2Cr/VBDzuFt7YUWCa +TrBkgvE941YQo2xnia203aRiDFi/JhEVAiaNh+ycHQeNIW8bYsp6uoteR/DDoZpt +YKMMQAhdD9QRHKTTDFfOs4a3G2nOsnTdgCcLQKlbHCZo53RSJcQrwOrt+QHop8Ut +yWMcOQ6dk2JK5ISCW8B11XpFJWd/TAlQkLO2J3R7Il40g87k1UnHG58F7N37SNi1 +Hku3AH4sARx8mmcQAUhVHHiriJQ6W8DCE6tX7RBoRcSgA5NK9iCMmX6s+X297Die +yttoGPfDPph6DTd/4SzL5HjQGsusfpYsJmIimNuksHUbyI/fwd7R1n8ho2ZYSbsQ +XLo4NtTc+mD+xu4Au/FAWCQeNxZf6I5iFlhLMvYpswNHIc/TAy9NdEkBaVVt7ILP +GtQNzEeNPdDMjyCsigqP7LtkB0tTuPngvJnZqMCAxnzBbQeLqv4+1MrjyQARAQAB +zR9MYXVuY2hwYWQgUFBBIGZvciB3aXJlZ3VhcmQtcHBhwsF4BBMBAgAiBQJYLHSZ +AhsDBgsJCAcDAgYVCAIJCgsEFgIDAQIeAQIXgAAKCRCuM4NfUEoaJUWCD/9i46Pu +YjRa1xLNTCfwMKhy+xPmi3oiB59iWYfUS82XNISJE2ZVdXbWAmlVVl3enGa1oY4w +aX2XZes4uAq/0S/QTZixHcCZs/vEVDdFg7UdvfswJ+eu4P/A6oh8JoJILMaIXhfy +92wEjFrI2NV3tB/3aee4nxJsUYLbBx3DhRzTfHYXiP1zKJxPWBilNLbme8vhYiLc +6PyUWFXzWms50Nk1c38mmMAv4lqlX7dC4U9HcZs3TT0oOC7oTU7l5F/0HMy0GzRl +Ual7mDmtvcKsUS8HRlCSPDE44hwnXmeuhcV5bRPAlyRlyP63n8zzlzfzQ1sgFjo8 +vN7VEaQVxERManwpT3BTOfyFT82yUGHeGgTAs8FI3Fr6aGk04nH0xpPrCZCQfSAw +ZoziI0DM3iWl603NBFZM7brYJvebQrH8CpiaqzlcvxQe9KfOA9ootSC2pOdLFMa7 +me8nZUSZCo2/9AfKpTlCl3szPmAeAHc/M++doc6VSIchaZgB2NybBLqbm/2hJhc0 +HwWxODILKCzBfjabqfnd+SeOIZkQ5JjYNVGqy4vOv5zkeQ9wVGHurzCGKfJ953ab +bufG+23D72u9enVZT+L4zH666hdQ6zyM0lrYcrBfPPnZkrQxBIilpvlOdLYDieUE +fiJGS5WoFr1yr8b7oQxTrZlCeHk3r3FJIhv2dQ== +=3EYq +-----END PGP PUBLIC KEY BLOCK----- +EOF + echo "deb http://ppa.launchpad.net/wireguard/wireguard/ubuntu bionic main" > /etc/apt/sources.list.d/wireguard-ubuntu-wireguard-bionic.list + apt-get update + # Try to install kernel headers for the running kernel and avoid a reboot. This + # can fail, so it's important to run separately from the other apt-get command. + apt-get install -y linux-headers-$(uname -r) + # linux-headers-generic points to the latest headers. We install it because if + # the system has an outdated kernel, there is no guarantee that old headers were + # still downloadable and to provide suitable headers for future kernel updates. + apt-get install -y linux-headers-generic + apt-get install -y wireguard iptables qrencode + elif [[ "$os" == "debian" && "$os_version" -eq 10 ]]; then + # Debian 10 + if ! grep -qs '^deb .* buster-backports main' /etc/apt/sources.list /etc/apt/sources.list.d/*.list; then + echo "deb http://deb.debian.org/debian buster-backports main" >> /etc/apt/sources.list + fi + apt-get update + # Try to install kernel headers for the running kernel and avoid a reboot. This + # can fail, so it's important to run separately from the other apt-get command. + apt-get install -y linux-headers-$(uname -r) + # There are cleaner ways to find out the $architecture, but we require an + # specific format for the package name and this approach provides what we need. + architecture=$(dpkg --get-selections 'linux-image-*-*' | cut -f 1 | grep -oE '[^-]*$' -m 1) + # linux-headers-$architecture points to the latest headers. We install it + # because if the system has an outdated kernel, there is no guarantee that old + # headers were still downloadable and to provide suitable headers for future + # kernel updates. + apt-get install -y linux-headers-"$architecture" + apt-get install -y wireguard iptables qrencode + elif [[ "$os" == "centos" && "$os_version" -eq 8 ]]; then + # CentOS 8 + dnf install -y epel-release elrepo-release + dnf install -y kmod-wireguard wireguard-tools firewalld qrencode + mkdir -p /etc/wireguard/ + systemctl enable --now firewalld.service + elif [[ "$os" == "centos" && "$os_version" -eq 7 ]]; then + # CentOS 7 + yum install -y epel-release https://www.elrepo.org/elrepo-release-7.el7.elrepo.noarch.rpm + yum install -y yum-plugin-elrepo + yum install -y kmod-wireguard wireguard-tools firewalld qrencode + mkdir -p /etc/wireguard/ + systemctl enable --now firewalld.service + elif [[ "$os" == "fedora" ]]; then + # Fedora + dnf install -y wireguard-tools firewalld qrencode + mkdir -p /etc/wireguard/ + systemctl enable --now firewalld.service + fi + # Generate wg0.conf + cat << EOF > /etc/wireguard/wg0.conf +# Do not alter the commented lines +# They are used by wireguard-install +# ENDPOINT $ip + +[Interface] +Address = 10.7.0.1/24$([[ -n "$ip6" ]] && echo ", fddd:2c4:2c4:2c4::1/64") +PrivateKey = $(wg genkey) +ListenPort = $port + +EOF + chmod 600 /etc/wireguard/wg0.conf + # Enable net.ipv4.ip_forward for the system + echo 'net.ipv4.ip_forward=1' > /etc/sysctl.d/30-wireguard-forward.conf + # Enable without waiting for a reboot or service restart + echo 1 > /proc/sys/net/ipv4/ip_forward + if [[ -n "$ip6" ]]; then + # Enable net.ipv6.conf.all.forwarding for the system + echo "net.ipv6.conf.all.forwarding=1" >> /etc/sysctl.d/30-wireguard-forward.conf + # Enable without waiting for a reboot or service restart + echo 1 > /proc/sys/net/ipv6/conf/all/forwarding + fi + if systemctl is-active --quiet firewalld.service; then + # Using both permanent and not permanent rules to avoid a firewalld + # reload. + firewall-cmd --add-port="$port"/udp + firewall-cmd --zone=trusted --add-source=10.7.0.0/24 + firewall-cmd --permanent --add-port="$port"/udp + firewall-cmd --permanent --zone=trusted --add-source=10.7.0.0/24 + # Set NAT for the VPN subnet + firewall-cmd --direct --add-rule ipv4 nat POSTROUTING 0 -s 10.7.0.0/24 ! -d 10.7.0.0/24 -j SNAT --to "$ip" + firewall-cmd --permanent --direct --add-rule ipv4 nat POSTROUTING 0 -s 10.7.0.0/24 ! -d 10.7.0.0/24 -j SNAT --to "$ip" + if [[ -n "$ip6" ]]; then + firewall-cmd --zone=trusted --add-source=fddd:2c4:2c4:2c4::/64 + firewall-cmd --permanent --zone=trusted --add-source=fddd:2c4:2c4:2c4::/64 + firewall-cmd --direct --add-rule ipv6 nat POSTROUTING 0 -s fddd:2c4:2c4:2c4::/64 ! -d fddd:2c4:2c4:2c4::/64 -j SNAT --to "$ip6" + firewall-cmd --permanent --direct --add-rule ipv6 nat POSTROUTING 0 -s fddd:2c4:2c4:2c4::/64 ! -d fddd:2c4:2c4:2c4::/64 -j SNAT --to "$ip6" + fi + else + # Create a service to set up persistent iptables rules + iptables_path=$(command -v iptables) + ip6tables_path=$(command -v ip6tables) + echo "[Unit] +Before=network.target +[Service] +Type=oneshot +ExecStart=$iptables_path -t nat -A POSTROUTING -s 10.7.0.0/24 ! -d 10.7.0.0/24 -j SNAT --to $ip +ExecStart=$iptables_path -I INPUT -p udp --dport $port -j ACCEPT +ExecStart=$iptables_path -I FORWARD -s 10.7.0.0/24 -j ACCEPT +ExecStart=$iptables_path -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT +ExecStop=$iptables_path -t nat -D POSTROUTING -s 10.7.0.0/24 ! -d 10.7.0.0/24 -j SNAT --to $ip +ExecStop=$iptables_path -D INPUT -p udp --dport $port -j ACCEPT +ExecStop=$iptables_path -D FORWARD -s 10.7.0.0/24 -j ACCEPT +ExecStop=$iptables_path -D FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT" > /etc/systemd/system/wg-iptables.service + if [[ -n "$ip6" ]]; then + echo "ExecStart=/sbin/ip6tables -t nat -A POSTROUTING -s fddd:2c4:2c4:2c4::/64 ! -d fddd:2c4:2c4:2c4::/64 -j SNAT --to $ip6 +ExecStart=$ip6tables_path -I FORWARD -s fddd:2c4:2c4:2c4::/64 -j ACCEPT +ExecStart=$ip6tables_path -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT +ExecStop=$ip6tables_path -t nat -D POSTROUTING -s fddd:2c4:2c4:2c4::/64 ! -d fddd:2c4:2c4:2c4::/64 -j SNAT --to $ip6 +ExecStop=$ip6tables_path -D FORWARD -s fddd:2c4:2c4:2c4::/64 -j ACCEPT +ExecStop=$ip6tables_path -D FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT" >> /etc/systemd/system/wg-iptables.service + fi + echo "RemainAfterExit=yes +[Install] +WantedBy=multi-user.target" >> /etc/systemd/system/wg-iptables.service + systemctl enable --now wg-iptables.service + fi + # If the server is behind NAT, use the correct IP address + [[ ! -z "$public_ip" ]] && ip="$public_ip" + # Generates the custom client.conf + new_client_setup + # Enable and start the wg-quick service + systemctl enable --now wg-quick@wg0.service + echo + qrencode -t UTF8 < ~/"$client.conf" + echo -e '\xE2\x86\x91 That is a QR code containing your client configuration.' + echo + # If the kernel module didn't load, system probably had an outdated kernel + # We'll try to help, but will not will not force a kernel upgrade upon the user + if ! modprobe -nq wireguard; then + echo "Warning!" + echo "Installation was finished, but the WireGuard kernel module could not load." + if [[ "$os" == "ubuntu" && "$os_version" -eq 1804 ]]; then + echo 'Upgrade the kernel and headers with "apt-get install linux-generic" and restart.' + elif [[ "$os" == "debian" && "$os_version" -eq 10 ]]; then + echo "Upgrade the kernel with \"apt-get install linux-image-$architecture\" and restart." + elif [[ "$os" == "centos" && "$os_version" -le 8 ]]; then + echo "Reboot your system to load the most recent kernel." + fi + else + echo "Finished!" + fi + echo + echo "Your client configuration is available at:" ~/"$client.conf" + echo "If you want to add more clients, just run this script again." +else + clear + echo "Looks like WireGuard is already installed." + echo + echo "What do you want to do?" + echo " 1) Add a new user" + echo " 2) Remove an existing user" + echo " 3) Remove WireGuard" + echo " 4) Exit" + read -p "Select an option: " option + until [[ "$option" =~ ^[1-4]$ ]]; do + echo "$option: invalid selection." + read -p "Select an option: " option + done + case "$option" in + 1) + echo + echo "Tell me a name for the client." + read -p "Client name: " unsanitized_client + # Allow a limited set of characters to avoid conflicts + client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client") + while [[ -z "$client" || -n $(grep "^# BEGIN_PEER $client$" /etc/wireguard/wg0.conf) ]]; do + echo "$client: invalid client name." + read -p "Client name: " unsanitized_client + client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client") + done + echo + new_client_dns + new_client_setup + # Append the configuration to the WireGuard interface + wg addconf wg0 <(wg-quick strip wg0) + echo + qrencode -t UTF8 < ~/"$client.conf" + echo -e '\xE2\x86\x91 That is a QR code containing your client configuration.' + echo + echo "Client $client added, configuration is available at:" ~/"$client.conf" + exit + ;; + 2) + # This option could be documented a bit better and maybe even be simplified + # ...but what can I say, I want some sleep too + number_of_clients=$(grep -c '^# BEGIN_PEER' /etc/wireguard/wg0.conf) + if [[ "$number_of_clients" = 0 ]]; then + echo + echo "You have no existing clients!" + exit + fi + echo + echo "Select the existing client you want to remove:" + grep '^# BEGIN_PEER' /etc/wireguard/wg0.conf | cut -d ' ' -f 3 | nl -s ') ' + read -p "Select one client: " client_number + until [[ "$client_number" =~ ^[0-9]+$ && "$client_number" -le "$number_of_clients" ]]; do + echo "$client_number: invalid selection." + read -p "Select one client: " client_number + done + client=$(grep '^# BEGIN_PEER' /etc/wireguard/wg0.conf | cut -d ' ' -f 3 | sed -n "$client_number"p) + echo + read -p "Do you really want to remove access for client $client? [y/N]: " remove + until [[ "$remove" =~ ^[yYnN]*$ ]]; do + echo "$remove: invalid selection." + read -p "Do you really want to remove access for client $client? [y/N]: " remove + done + if [[ "$remove" =~ ^[yY]$ ]]; then + # The following is the right way to avoid disrupting other active connections: + # Remove from the live interface + wg set wg0 peer $(sed -n "/^# BEGIN_PEER $client$/,\$p" /etc/wireguard/wg0.conf | grep -m 1 PublicKey | cut -d " " -f 3) remove + # Remove from the configuration file + sed -i "/^# BEGIN_PEER $client/,/^# END_PEER $client/d" /etc/wireguard/wg0.conf + echo + echo "Client $client has been removed!" + else + echo + echo "Removal of client $client aborted!" + fi + exit + ;; + 3) + echo + read -p "Do you really want to remove WireGuard? [y/N]: " remove + until [[ "$remove" =~ ^[yYnN]*$ ]]; do + echo "$remove: invalid selection." + read -p "Do you really want to remove WireGuard? [y/N]: " remove + done + if [[ "$remove" =~ ^[yY]$ ]]; then + port=$(grep '^ListenPort' /etc/wireguard/wg0.conf | cut -d " " -f 3) + if systemctl is-active --quiet firewalld.service; then + ip=$(firewall-cmd --direct --get-rules ipv4 nat POSTROUTING | grep '\-s 10.7.0.0/24 '"'"'!'"'"' -d 10.7.0.0/24' | grep -oE '[^ ]+$') + # Using both permanent and not permanent rules to avoid a firewalld reload. + firewall-cmd --remove-port="$port"/udp + firewall-cmd --zone=trusted --remove-source=10.7.0.0/24 + firewall-cmd --permanent --remove-port="$port"/udp + firewall-cmd --permanent --zone=trusted --remove-source=10.7.0.0/24 + firewall-cmd --direct --remove-rule ipv4 nat POSTROUTING 0 -s 10.7.0.0/24 ! -d 10.7.0.0/24 -j SNAT --to "$ip" + firewall-cmd --permanent --direct --remove-rule ipv4 nat POSTROUTING 0 -s 10.7.0.0/24 ! -d 10.7.0.0/24 -j SNAT --to "$ip" + if grep -qs 'fddd:2c4:2c4:2c4::1/64' /etc/wireguard/wg0.conf; then + ip6=$(firewall-cmd --direct --get-rules ipv6 nat POSTROUTING | grep '\-s fddd:2c4:2c4:2c4::/64 '"'"'!'"'"' -d fddd:2c4:2c4:2c4::/64' | grep -oE '[^ ]+$') + firewall-cmd --zone=trusted --remove-source=fddd:2c4:2c4:2c4::/64 + firewall-cmd --permanent --zone=trusted --remove-source=fddd:2c4:2c4:2c4::/64 + firewall-cmd --direct --remove-rule ipv6 nat POSTROUTING 0 -s fddd:2c4:2c4:2c4::/64 ! -d fddd:2c4:2c4:2c4::/64 -j SNAT --to "$ip6" + firewall-cmd --permanent --direct --remove-rule ipv6 nat POSTROUTING 0 -s fddd:2c4:2c4:2c4::/64 ! -d fddd:2c4:2c4:2c4::/64 -j SNAT --to "$ip6" + fi + else + systemctl disable --now wg-iptables.service + rm -f /etc/systemd/system/wg-iptables.service + fi + systemctl disable --now wg-quick@wg0.service + rm -f /etc/sysctl.d/30-wireguard-forward.conf + if [[ "$os" == "ubuntu" && "$os_version" -ge 2004 ]]; then + # Ubuntu 20.04 or higher + rm -rf /etc/wireguard/ + apt-get remove --purge -y wireguard wireguard-tools + elif [[ "$os" == "ubuntu" && "$os_version" -eq 1804 ]]; then + # Ubuntu 18.04 + rm -f /etc/apt/sources.list.d/wireguard-ubuntu-wireguard-bionic.list + apt-key del E1B39B6EF6DDB96564797591AE33835F504A1A25 + rm -rf /etc/wireguard/ + apt-get remove --purge -y wireguard wireguard-dkms wireguard-tools + elif [[ "$os" == "debian" && "$os_version" -eq 10 ]]; then + # Debian 10 + rm -rf /etc/wireguard/ + apt-get remove --purge -y wireguard wireguard-dkms wireguard-tools + elif [[ "$os" == "centos" && "$os_version" -eq 8 ]]; then + # CentOS 8 + rm -rf /etc/wireguard/ + dnf remove -y kmod-wireguard wireguard-tools + elif [[ "$os" == "centos" && "$os_version" -eq 7 ]]; then + # CentOS 7 + rm -rf /etc/wireguard/ + yum remove -y kmod-wireguard wireguard-tools + elif [[ "$os" == "fedora" ]]; then + # Fedora + rm -rf /etc/wireguard/ + dnf remove -y wireguard-tools + fi + echo + echo "WireGuard removed!" + else + echo + echo "Removal aborted!" + fi + exit + ;; + 4) + exit + ;; + esac +fi