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AbdelaliDousbah/wireguard-install.sh

Created July 7, 2023 14:52
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WireGuard installer for Ubuntu, Debian, AlmaLinux, Rocky Linux, CentOS and Fedora
Raw
wireguard-install.sh
#!/bin/bash
#
# https://github.com/AbdelaliDousbah
# Detect Debian users running the script with "sh" instead of bash
if readlink /proc/$$/exe | grep -q "dash"; then
echo 'This installer needs to be run with "bash", not "sh".'
exit
fi
# Discard stdin. Needed when running from an one-liner which includes a newline
read -N 999999 -t 0.001
# Detect OpenVZ 6
if [[ $(uname -r | cut -d "." -f 1) -eq 2 ]]; then
echo "The system is running an old kernel, which is incompatible with this installer."
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 '.')
elif [[ -e /etc/debian_version ]]; then
os="debian"
os_version=$(grep -oE '[0-9]+' /etc/debian_version | head -1)
elif [[ -e /etc/almalinux-release || -e /etc/rocky-release || -e /etc/centos-release ]]; then
os="centos"
os_version=$(grep -shoE '[0-9]+' /etc/almalinux-release /etc/rocky-release /etc/centos-release | head -1)
elif [[ -e /etc/fedora-release ]]; then
os="fedora"
os_version=$(grep -oE '[0-9]+' /etc/fedora-release | head -1)
else
echo "This installer seems to be running on an unsupported distribution.
Supported distros are Ubuntu, Debian, AlmaLinux, Rocky Linux, CentOS and Fedora."
exit
fi
if [[ "$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
# Detect environments where $PATH does not include the sbin directories
if ! grep -q sbin <<< "$PATH"; then
echo '$PATH does not include sbin. Try using "su -" instead of "su".'
exit
fi
systemd-detect-virt -cq
is_container="$?"
if [[ "$os" == "fedora" && "$os_version" -eq 31 && $(uname -r | cut -d "." -f 2) -lt 6 && ! "$is_container" -eq 0 ]]; then
echo 'Fedora 31 is supported, but the kernel is outdated.
Upgrade the kernel using "dnf upgrade kernel" and restart.'
exit
fi
if [[ "$EUID" -ne 0 ]]; then
echo "This installer needs to be run with superuser privileges."
exit
fi
if [[ "$is_container" -eq 0 ]]; then
if [ "$(uname -m)" != "x86_64" ]; then
echo "In containerized systems, this installer supports only the x86_64 architecture.
The system runs on $(uname -m) and is unsupported."
exit
fi
# TUN device is required to use BoringTun if running inside a container
if [[ ! -e /dev/net/tun ]] || ! ( exec 7<>/dev/net/tun ) 2>/dev/null; then
echo "The system does not have the TUN device available.
TUN needs to be enabled before running this installer."
exit
fi
fi
new_client_dns () {
echo "Select a DNS server for the client:"
echo " 1) Current system resolvers"
echo " 2) Google"
echo " 3) 1.1.1.1"
echo " 4) OpenDNS"
echo " 5) Quad9"
echo " 6) AdGuard"
read -p "DNS server [1]: " dns
until [[ -z "$dns" || "$dns" =~ ^[1-6]$ ]]; do
echo "$dns: invalid selection."
read -p "DNS server [1]: " dns
done
# DNS
case "$dns" in
1|"")
# Locate the proper resolv.conf
# Needed for systems running systemd-resolved
if grep '^nameserver' "/etc/resolv.conf" | grep -qv '127.0.0.53' ; then
resolv_conf="/etc/resolv.conf"
else
resolv_conf="/run/systemd/resolve/resolv.conf"
fi
# Extract nameservers and provide them in the required format
dns=$(grep -v '^#\|^;' "$resolv_conf" | grep '^nameserver' | grep -v '127.0.0.53' | grep -oE '[0-9]{1,3}(\.[0-9]{1,3}){3}' | xargs | sed -e 's/ /, /g')
;;
2)
dns="8.8.8.8, 8.8.4.4"
;;
3)
dns="1.1.1.1, 1.0.0.1"
;;
4)
dns="208.67.222.222, 208.67.220.220"
;;
5)
dns="9.9.9.9, 149.112.112.112"
;;
6)
dns="94.140.14.14, 94.140.15.15"
;;
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
# Detect some Debian minimal setups where neither wget nor curl are installed
if ! hash wget 2>/dev/null && ! hash curl 2>/dev/null; then
echo "Wget is required to use this installer."
read -n1 -r -p "Press any key to install Wget and continue..."
apt-get update
apt-get install -y wget
fi
clear
echo 'Welcome to this WireGuard road warrior installer!'
# If system has a single IPv4, it is selected automatically. Else, ask the user
if [[ $(ip -4 addr | grep inet | grep -vEc '127(\.[0-9]{1,3}){3}') -eq 1 ]]; then
ip=$(ip -4 addr | grep inet | grep -vE '127(\.[0-9]{1,3}){3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}(\.[0-9]{1,3}){3}')
else
number_of_ip=$(ip -4 addr | grep inet | grep -vEc '127(\.[0-9]{1,3}){3}')
echo
echo "Which IPv4 address should be used?"
ip -4 addr | grep inet | grep -vE '127(\.[0-9]{1,3}){3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}(\.[0-9]{1,3}){3}' | nl -s ') '
read -p "IPv4 address [1]: " ip_number
until [[ -z "$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=$(ip -4 addr | grep inet | grep -vE '127(\.[0-9]{1,3}){3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}(\.[0-9]{1,3}){3}' | sed -n "$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=$(grep -m 1 -oE '^[0-9]{1,3}(\.[0-9]{1,3}){3}$' <<< "$(wget -T 10 -t 1 -4qO- "http://ip1.dynupdate.no-ip.com/" || curl -m 10 -4Ls "http://ip1.dynupdate.no-ip.com/")")
read -p "Public IPv4 address / hostname [$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 "Which IPv6 address should be used?"
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 should WireGuard listen 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 "$port" ]] && port="51820"
echo
echo "Enter a name for the first client:"
read -p "Name [client]: " unsanitized_client
# Allow a limited set of characters to avoid conflicts
client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client")
[[ -z "$client" ]] && client="client"
echo
new_client_dns
# Set up automatic updates for BoringTun if the user is fine with that
if [[ "$is_container" -eq 0 ]]; then
echo
echo "BoringTun will be installed to set up WireGuard in the system."
read -p "Should automatic updates be enabled for it? [Y/n]: " boringtun_updates
until [[ "$boringtun_updates" =~ ^[yYnN]*$ ]]; do
echo "$remove: invalid selection."
read -p "Should automatic updates be enabled for it? [Y/n]: " boringtun_updates
done
[[ -z "$boringtun_updates" ]] && boringtun_updates="y"
if [[ "$boringtun_updates" =~ ^[yY]$ ]]; then
if [[ "$os" == "centos" || "$os" == "fedora" ]]; then
cron="cronie"
elif [[ "$os" == "debian" || "$os" == "ubuntu" ]]; then
cron="cron"
fi
fi
fi
echo
echo "WireGuard installation is ready to begin."
# Install a firewall if firewalld or iptables are not already available
if ! systemctl is-active --quiet firewalld.service && ! hash iptables 2>/dev/null; then
if [[ "$os" == "centos" || "$os" == "fedora" ]]; then
firewall="firewalld"
# We don't want to silently enable firewalld, so we give a subtle warning
# If the user continues, firewalld will be installed and enabled during setup
echo "firewalld, which is required to manage routing tables, will also be installed."
elif [[ "$os" == "debian" || "$os" == "ubuntu" ]]; then
# iptables is way less invasive than firewalld so no warning is given
firewall="iptables"
fi
fi
read -n1 -r -p "Press any key to continue..."
# Install WireGuard
# If not running inside a container, set up the WireGuard kernel module
if [[ ! "$is_container" -eq 0 ]]; then
if [[ "$os" == "ubuntu" ]]; then
# Ubuntu
apt-get update
apt-get install -y wireguard qrencode $firewall
elif [[ "$os" == "debian" && "$os_version" -ge 11 ]]; then
# Debian 11 or higher
apt-get update
apt-get install -y wireguard qrencode $firewall
elif [[ "$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 qrencode $firewall
elif [[ "$os" == "centos" && "$os_version" -ge 9 ]]; then
# CentOS 9 or higher
dnf install -y epel-release
dnf install -y wireguard-tools qrencode $firewall
elif [[ "$os" == "centos" && "$os_version" -eq 8 ]]; then
# CentOS 8
dnf install -y epel-release elrepo-release
dnf install -y kmod-wireguard wireguard-tools qrencode $firewall
mkdir -p /etc/wireguard/
elif [[ "$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 qrencode $firewall
mkdir -p /etc/wireguard/
elif [[ "$os" == "fedora" ]]; then
# Fedora
dnf install -y wireguard-tools qrencode $firewall
mkdir -p /etc/wireguard/
fi
# Else, we are inside a container and BoringTun needs to be used
else
# Install required packages
if [[ "$os" == "ubuntu" ]]; then
# Ubuntu
apt-get update
apt-get install -y qrencode ca-certificates $cron $firewall
apt-get install -y wireguard-tools --no-install-recommends
elif [[ "$os" == "debian" && "$os_version" -ge 11 ]]; then
# Debian 11 or higher
apt-get update
apt-get install -y qrencode ca-certificates $cron $firewall
apt-get install -y wireguard-tools --no-install-recommends
elif [[ "$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
apt-get install -y qrencode ca-certificates $cron $firewall
apt-get install -y wireguard-tools --no-install-recommends
elif [[ "$os" == "centos" && "$os_version" -ge 9 ]]; then
# CentOS 9 or higher
dnf install -y epel-release
dnf install -y wireguard-tools qrencode ca-certificates tar $cron $firewall
elif [[ "$os" == "centos" && "$os_version" -eq 8 ]]; then
# CentOS 8
dnf install -y epel-release
dnf install -y wireguard-tools qrencode ca-certificates tar $cron $firewall
mkdir -p /etc/wireguard/
elif [[ "$os" == "centos" && "$os_version" -eq 7 ]]; then
# CentOS 7
yum install -y epel-release
yum install -y wireguard-tools qrencode ca-certificates tar $cron $firewall
mkdir -p /etc/wireguard/
elif [[ "$os" == "fedora" ]]; then
# Fedora
dnf install -y wireguard-tools qrencode ca-certificates tar $cron $firewall
mkdir -p /etc/wireguard/
fi
# Grab the BoringTun binary using wget or curl and extract into the right place.
# Don't use this service elsewhere without permission! Contact me before you do!
{ wget -qO- https://wg.nyr.be/1/latest/download 2>/dev/null || curl -sL https://wg.nyr.be/1/latest/download ; } | tar xz -C /usr/local/sbin/ --wildcards 'boringtun-*/boringtun' --strip-components 1
# Configure wg-quick to use BoringTun
mkdir /etc/systemd/system/wg-quick@wg0.service.d/ 2>/dev/null
echo "[Service]
Environment=WG_QUICK_USERSPACE_IMPLEMENTATION=boringtun
Environment=WG_SUDO=1" > /etc/systemd/system/wg-quick@wg0.service.d/boringtun.conf
if [[ -n "$cron" ]] && [[ "$os" == "centos" || "$os" == "fedora" ]]; then
systemctl enable --now crond.service
fi
fi
# If firewalld was just installed, enable it
if [[ "$firewall" == "firewalld" ]]; then
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 $([[ -n "$public_ip" ]] && echo "$public_ip" || echo "$ip")
[Interface]
Address = 10.7.0.1/24$([[ -n "$ip6" ]] && echo ", fddd:2c4:2c4:2c4::1/64")
PrivateKey = $(wg genkey)
ListenPort = $port
EOF
chmod 600 /etc/wireguard/wg0.conf
# Enable net.ipv4.ip_forward for the system
echo 'net.ipv4.ip_forward=1' > /etc/sysctl.d/99-wireguard-forward.conf
# Enable without waiting for a reboot or service restart
echo 1 > /proc/sys/net/ipv4/ip_forward
if [[ -n "$ip6" ]]; then
# Enable net.ipv6.conf.all.forwarding for the system
echo "net.ipv6.conf.all.forwarding=1" >> /etc/sysctl.d/99-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)
# nf_tables is not available as standard in OVZ kernels. So use iptables-legacy
# if we are in OVZ, with a nf_tables backend and iptables-legacy is available.
if [[ $(systemd-detect-virt) == "openvz" ]] && readlink -f "$(command -v iptables)" | grep -q "nft" && hash iptables-legacy 2>/dev/null; then
iptables_path=$(command -v iptables-legacy)
ip6tables_path=$(command -v ip6tables-legacy)
fi
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=$ip6tables_path -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=$ip6tables_path -D FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT" >> /etc/systemd/system/wg-iptables.service
fi
echo "RemainAfterExit=yes
[Install]
WantedBy=multi-user.target" >> /etc/systemd/system/wg-iptables.service
systemctl enable --now wg-iptables.service
fi
# Generates the custom client.conf
new_client_setup
# Enable and start the wg-quick service
systemctl enable --now wg-quick@wg0.service
# Set up automatic updates for BoringTun if the user wanted to
if [[ "$boringtun_updates" =~ ^[yY]$ ]]; then
# Deploy upgrade script
cat << 'EOF' > /usr/local/sbin/boringtun-upgrade
#!/bin/bash
latest=$(wget -qO- https://wg.nyr.be/1/latest 2>/dev/null || curl -sL https://wg.nyr.be/1/latest 2>/dev/null)
# If server did not provide an appropriate response, exit
if ! head -1 <<< "$latest" | grep -qiE "^boringtun.+[0-9]+\.[0-9]+.*$"; then
echo "Update server unavailable"
exit
fi
current=$(/usr/local/sbin/boringtun -V)
if [[ "$current" != "$latest" ]]; then
download="https://wg.nyr.be/1/latest/download"
xdir=$(mktemp -d)
# If download and extraction are successful, upgrade the boringtun binary
if { wget -qO- "$download" 2>/dev/null || curl -sL "$download" ; } | tar xz -C "$xdir" --wildcards "boringtun-*/boringtun" --strip-components 1; then
systemctl stop wg-quick@wg0.service
rm -f /usr/local/sbin/boringtun
mv "$xdir"/boringtun /usr/local/sbin/boringtun
systemctl start wg-quick@wg0.service
echo "Succesfully updated to $(/usr/local/sbin/boringtun -V)"
else
echo "boringtun update failed"
fi
rm -rf "$xdir"
else
echo "$current is up to date"
fi
EOF
chmod +x /usr/local/sbin/boringtun-upgrade
# Add cron job to run the updater daily at a random time between 3:00 and 5:59
{ crontab -l 2>/dev/null; echo "$(( $RANDOM % 60 )) $(( $RANDOM % 3 + 3 )) * * * /usr/local/sbin/boringtun-upgrade &>/dev/null" ; } | crontab -
fi
echo
qrencode -t UTF8 < ~/"$client.conf"
echo -e '\xE2\x86\x91 That is a QR code containing the client configuration.'
echo
# If the kernel module didn't load, system probably had an outdated kernel
# We'll try to help, but will not force a kernel upgrade upon the user
if [[ ! "$is_container" -eq 0 ]] && ! modprobe -nq wireguard; then
echo "Warning!"
echo "Installation was finished, but the WireGuard kernel module could not load."
if [[ "$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 the system to load the most recent kernel."
fi
else
echo "Finished!"
fi
echo
echo "The client configuration is available in:" ~/"$client.conf"
echo "New clients can be added by running this script again."
else
clear
echo "WireGuard is already installed."
echo
echo "Select an option:"
echo " 1) Add a new client"
echo " 2) Remove an existing client"
echo " 3) Remove WireGuard"
echo " 4) Exit"
read -p "Option: " option
until [[ "$option" =~ ^[1-4]$ ]]; do
echo "$option: invalid selection."
read -p "Option: " option
done
case "$option" in
1)
echo
echo "Provide a name for the client:"
read -p "Name: " unsanitized_client
# Allow a limited set of characters to avoid conflicts
client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client")
while [[ -z "$client" ]] || grep -q "^# BEGIN_PEER $client$" /etc/wireguard/wg0.conf; do
echo "$client: invalid name."
read -p "Name: " unsanitized_client
client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client")
done
echo
new_client_dns
new_client_setup
# Append new client configuration to the WireGuard interface
wg addconf wg0 <(sed -n "/^# BEGIN_PEER $client/,/^# END_PEER $client/p" /etc/wireguard/wg0.conf)
echo
qrencode -t UTF8 < ~/"$client.conf"
echo -e '\xE2\x86\x91 That is a QR code containing your client configuration.'
echo
echo "$client added. Configuration available in:" ~/"$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 "There are no existing clients!"
exit
fi
echo
echo "Select the client to remove:"
grep '^# BEGIN_PEER' /etc/wireguard/wg0.conf | cut -d ' ' -f 3 | nl -s ') '
read -p "Client: " client_number
until [[ "$client_number" =~ ^[0-9]+$ && "$client_number" -le "$number_of_clients" ]]; do
echo "$client_number: invalid selection."
read -p "Client: " client_number
done
client=$(grep '^# BEGIN_PEER' /etc/wireguard/wg0.conf | cut -d ' ' -f 3 | sed -n "$client_number"p)
echo
read -p "Confirm $client removal? [y/N]: " remove
until [[ "$remove" =~ ^[yYnN]*$ ]]; do
echo "$remove: invalid selection."
read -p "Confirm $client removal? [y/N]: " remove
done
if [[ "$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 "$client removed!"
else
echo
echo "$client removal aborted!"
fi
exit
;;
3)
echo
read -p "Confirm WireGuard removal? [y/N]: " remove
until [[ "$remove" =~ ^[yYnN]*$ ]]; do
echo "$remove: invalid selection."
read -p "Confirm WireGuard removal? [y/N]: " remove
done
if [[ "$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 "$ip6"
fi
else
systemctl disable --now wg-iptables.service
rm -f /etc/systemd/system/wg-iptables.service
fi
systemctl disable --now wg-quick@wg0.service
rm -f /etc/systemd/system/wg-quick@wg0.service.d/boringtun.conf
rm -f /etc/sysctl.d/99-wireguard-forward.conf
# Different packages were installed if the system was containerized or not
if [[ ! "$is_container" -eq 0 ]]; then
if [[ "$os" == "ubuntu" ]]; then
# Ubuntu
rm -rf /etc/wireguard/
apt-get remove --purge -y wireguard wireguard-tools
elif [[ "$os" == "debian" && "$os_version" -ge 11 ]]; then
# Debian 11 or higher
rm -rf /etc/wireguard/
apt-get remove --purge -y wireguard wireguard-tools
elif [[ "$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" && "$os_version" -ge 9 ]]; then
# CentOS 9 or higher
dnf remove -y wireguard-tools
rm -rf /etc/wireguard/
elif [[ "$os" == "centos" && "$os_version" -eq 8 ]]; then
# CentOS 8
dnf remove -y kmod-wireguard wireguard-tools
rm -rf /etc/wireguard/
elif [[ "$os" == "centos" && "$os_version" -eq 7 ]]; then
# CentOS 7
yum remove -y kmod-wireguard wireguard-tools
rm -rf /etc/wireguard/
elif [[ "$os" == "fedora" ]]; then
# Fedora
dnf remove -y wireguard-tools
rm -rf /etc/wireguard/
fi
else
{ crontab -l 2>/dev/null | grep -v '/usr/local/sbin/boringtun-upgrade' ; } | crontab -
if [[ "$os" == "ubuntu" ]]; then
# Ubuntu
rm -rf /etc/wireguard/
apt-get remove --purge -y wireguard-tools
elif [[ "$os" == "debian" && "$os_version" -ge 11 ]]; then
# Debian 11 or higher
rm -rf /etc/wireguard/
apt-get remove --purge -y wireguard-tools
elif [[ "$os" == "debian" && "$os_version" -eq 10 ]]; then
# Debian 10
rm -rf /etc/wireguard/
apt-get remove --purge -y wireguard-tools
elif [[ "$os" == "centos" && "$os_version" -ge 9 ]]; then
# CentOS 9 or higher
dnf remove -y wireguard-tools
rm -rf /etc/wireguard/
elif [[ "$os" == "centos" && "$os_version" -eq 8 ]]; then
# CentOS 8
dnf remove -y wireguard-tools
rm -rf /etc/wireguard/
elif [[ "$os" == "centos" && "$os_version" -eq 7 ]]; then
# CentOS 7
yum remove -y wireguard-tools
rm -rf /etc/wireguard/
elif [[ "$os" == "fedora" ]]; then
# Fedora
dnf remove -y wireguard-tools
rm -rf /etc/wireguard/
fi
rm -f /usr/local/sbin/boringtun /usr/local/sbin/boringtun-upgrade
fi
echo
echo "WireGuard removed!"
else
echo
echo "WireGuard removal aborted!"
fi
exit
;;
4)
exit
;;
esac
fi
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