mirror of
https://github.com/hwdsl2/openvpn-install.git
synced 2026-01-11 19:06:18 +00:00
Improve setup
- Refactor setup script into functions for better readability and easier maintenance.
This commit is contained in:
hwdsl2
@@ -20,11 +20,355 @@ check_ip() {
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printf '%s' "$1" | tr -d '\n' | grep -Eq "$IP_REGEX"
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printf '%s' "$1" | tr -d '\n' | grep -Eq "$IP_REGEX"
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}
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}
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check_os() {
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if grep -qs "ubuntu" /etc/os-release; then
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os="ubuntu"
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os_version=$(grep 'VERSION_ID' /etc/os-release | cut -d '"' -f 2 | tr -d '.')
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group_name="nogroup"
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elif [[ -e /etc/debian_version ]]; then
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os="debian"
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os_version=$(grep -oE '[0-9]+' /etc/debian_version | head -1)
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group_name="nogroup"
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elif [[ -e /etc/almalinux-release || -e /etc/rocky-release || -e /etc/centos-release ]]; then
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os="centos"
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os_version=$(grep -shoE '[0-9]+' /etc/almalinux-release /etc/rocky-release /etc/centos-release | head -1)
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group_name="nobody"
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elif grep -qs "Amazon Linux release 2" /etc/system-release; then
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os="centos"
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os_version="7"
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group_name="nobody"
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elif [[ -e /etc/fedora-release ]]; then
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os="fedora"
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os_version=$(grep -oE '[0-9]+' /etc/fedora-release | head -1)
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group_name="nobody"
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else
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exiterr "This installer seems to be running on an unsupported distribution.
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Supported distros are Ubuntu, Debian, AlmaLinux, Rocky Linux, CentOS, Fedora and Amazon Linux 2."
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fi
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}
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check_os_ver() {
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if [[ "$os" == "ubuntu" && "$os_version" -lt 1804 ]]; then
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exiterr "Ubuntu 18.04 or higher is required to use this installer.
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This version of Ubuntu is too old and unsupported."
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fi
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if [[ "$os" == "debian" && "$os_version" -lt 9 ]]; then
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exiterr "Debian 9 or higher is required to use this installer.
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This version of Debian is too old and unsupported."
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fi
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if [[ "$os" == "centos" && "$os_version" -lt 7 ]]; then
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exiterr "CentOS 7 or higher is required to use this installer.
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This version of CentOS is too old and unsupported."
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fi
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}
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check_nftables() {
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if [ "$os" = "centos" ]; then
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if grep -qs "hwdsl2 VPN script" /etc/sysconfig/nftables.conf \
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|| systemctl is-active --quiet nftables 2>/dev/null; then
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exiterr "This system has nftables enabled, which is not supported by this installer."
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fi
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fi
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}
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install_wget() {
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# Detect some Debian minimal setups where neither wget nor curl are installed
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if ! hash wget 2>/dev/null && ! hash curl 2>/dev/null; then
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if [ "$auto" = 0 ]; then
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echo "Wget is required to use this installer."
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read -n1 -r -p "Press any key to install Wget and continue..."
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fi
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export DEBIAN_FRONTEND=noninteractive
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(
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set -x
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apt-get -yqq update || apt-get -yqq update
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apt-get -yqq install wget >/dev/null
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) || exiterr2
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fi
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}
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install_iproute() {
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if ! hash ip 2>/dev/null; then
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if [ "$auto" = 0 ]; then
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echo "iproute is required to use this installer."
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read -n1 -r -p "Press any key to install iproute and continue..."
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fi
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if [ "$os" = "debian" ] || [ "$os" = "ubuntu" ]; then
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export DEBIAN_FRONTEND=noninteractive
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(
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set -x
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apt-get -yqq update || apt-get -yqq update
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apt-get -yqq install iproute2 >/dev/null
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) || exiterr2
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else
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(
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set -x
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yum -y -q install iproute >/dev/null
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) || exiterr3
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fi
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fi
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}
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show_start_setup() {
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if [ "$auto" = 0 ]; then
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echo
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echo 'Welcome to this OpenVPN server installer!'
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echo 'GitHub: https://github.com/hwdsl2/openvpn-install'
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echo
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echo 'I need to ask you a few questions before starting setup.'
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echo 'You can use the default options and just press enter if you are OK with them.'
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else
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show_header
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echo
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echo 'Starting OpenVPN setup using default options.'
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fi
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}
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find_public_ip() {
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ip_url1="http://ipv4.icanhazip.com"
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ip_url2="http://ip1.dynupdate.no-ip.com"
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# Get public IP and sanitize with grep
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get_public_ip=$(grep -m 1 -oE '^[0-9]{1,3}(\.[0-9]{1,3}){3}$' <<< "$(wget -T 10 -t 1 -4qO- "$ip_url1" || curl -m 10 -4Ls "$ip_url1")")
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if ! check_ip "$get_public_ip"; then
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get_public_ip=$(grep -m 1 -oE '^[0-9]{1,3}(\.[0-9]{1,3}){3}$' <<< "$(wget -T 10 -t 1 -4qO- "$ip_url2" || curl -m 10 -4Ls "$ip_url2")")
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fi
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}
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detect_ip() {
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# If system has a single IPv4, it is selected automatically.
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if [[ $(ip -4 addr | grep inet | grep -vEc '127(\.[0-9]{1,3}){3}') -eq 1 ]]; then
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ip=$(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}')
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else
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# Use the IP address on the default route
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ip=$(ip -4 route get 1 | sed 's/ uid .*//' | awk '{print $NF;exit}' 2>/dev/null)
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if ! check_ip "$ip"; then
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find_public_ip
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ip_match=0
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if [ -n "$get_public_ip" ]; then
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ip_list=$(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}')
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while IFS= read -r line; do
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if [ "$line" = "$get_public_ip" ]; then
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ip_match=1
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ip="$line"
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fi
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done <<< "$ip_list"
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fi
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if [ "$ip_match" = 0 ]; then
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if [ "$auto" = 0 ]; then
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echo
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echo "Which IPv4 address should be used?"
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number_of_ip=$(ip -4 addr | grep inet | grep -vEc '127(\.[0-9]{1,3}){3}')
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ip -4 addr | grep inet | grep -vE '127(\.[0-9]{1,3}){3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}(\.[0-9]{1,3}){3}' | nl -s ') '
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read -rp "IPv4 address [1]: " ip_number
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until [[ -z "$ip_number" || "$ip_number" =~ ^[0-9]+$ && "$ip_number" -le "$number_of_ip" ]]; do
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echo "$ip_number: invalid selection."
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read -rp "IPv4 address [1]: " ip_number
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done
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[[ -z "$ip_number" ]] && ip_number=1
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else
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ip_number=1
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fi
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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)
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fi
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fi
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fi
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if ! check_ip "$ip"; then
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echo "Error: Could not detect this server's IP address." >&2
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echo "Abort. No changes were made." >&2
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exit 1
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fi
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}
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check_nat_ip() {
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# If $ip is a private IP address, the server must be behind NAT
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if printf '%s' "$ip" | grep -qE '^(10|127|172\.(1[6-9]|2[0-9]|3[0-1])|192\.168|169\.254)\.'; then
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find_public_ip
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if ! check_ip "$get_public_ip"; then
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if [ "$auto" = 0 ]; then
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echo
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echo "This server is behind NAT. What is the public IPv4 address?"
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read -rp "Public IPv4 address: " public_ip
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until check_ip "$public_ip"; do
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echo "Invalid input."
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read -rp "Public IPv4 address: " public_ip
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done
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else
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echo "Error: Could not detect this server's public IP." >&2
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echo "Abort. No changes were made." >&2
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exit 1
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fi
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else
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public_ip="$get_public_ip"
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fi
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fi
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}
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show_config() {
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if [ "$auto" != 0 ]; then
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echo
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printf '%s' "Server IP: "
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[ -n "$public_ip" ] && printf '%s\n' "$public_ip" || printf '%s\n' "$ip"
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echo "Port: UDP/1194"
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echo "Client name: client"
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echo "Client DNS: Google Public DNS"
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fi
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}
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detect_ipv6() {
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# If system has a single IPv6, it is selected automatically
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if [[ $(ip -6 addr | grep -c 'inet6 [23]') -eq 1 ]]; then
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ip6=$(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}')
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fi
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# If system has multiple IPv6, ask the user to select one
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if [[ $(ip -6 addr | grep -c 'inet6 [23]') -gt 1 ]]; then
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if [ "$auto" = 0 ]; then
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echo
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echo "Which IPv6 address should be used?"
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number_of_ip6=$(ip -6 addr | grep -c 'inet6 [23]')
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ip -6 addr | grep 'inet6 [23]' | cut -d '/' -f 1 | grep -oE '([0-9a-fA-F]{0,4}:){1,7}[0-9a-fA-F]{0,4}' | nl -s ') '
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read -rp "IPv6 address [1]: " ip6_number
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until [[ -z "$ip6_number" || "$ip6_number" =~ ^[0-9]+$ && "$ip6_number" -le "$number_of_ip6" ]]; do
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echo "$ip6_number: invalid selection."
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read -rp "IPv6 address [1]: " ip6_number
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done
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[[ -z "$ip6_number" ]] && ip6_number=1
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else
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ip6_number=1
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fi
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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)
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fi
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}
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select_protocol() {
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if [ "$auto" = 0 ]; then
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echo
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echo "Which protocol should OpenVPN use?"
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echo " 1) UDP (recommended)"
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echo " 2) TCP"
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read -rp "Protocol [1]: " protocol
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until [[ -z "$protocol" || "$protocol" =~ ^[12]$ ]]; do
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echo "$protocol: invalid selection."
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read -rp "Protocol [1]: " protocol
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done
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else
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protocol=1
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fi
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case "$protocol" in
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1|"")
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protocol=udp
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;;
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2)
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protocol=tcp
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;;
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esac
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}
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select_port() {
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if [ "$auto" = 0 ]; then
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echo
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echo "What port should OpenVPN listen to?"
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read -rp "Port [1194]: " port
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until [[ -z "$port" || "$port" =~ ^[0-9]+$ && "$port" -le 65535 ]]; do
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echo "$port: invalid port."
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read -rp "Port [1194]: " port
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done
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[[ -z "$port" ]] && port=1194
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else
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port=1194
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fi
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}
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enter_custom_dns() {
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read -rp "Enter primary DNS server: " dns1
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until check_ip "$dns1"; do
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echo "Invalid DNS server."
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read -rp "Enter primary DNS server: " dns1
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done
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read -rp "Enter secondary DNS server (Enter to skip): " dns2
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until [ -z "$dns2" ] || check_ip "$dns2"; do
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echo "Invalid DNS server."
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read -rp "Enter secondary DNS server (Enter to skip): " dns2
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done
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}
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select_dns() {
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if [ "$auto" = 0 ]; then
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echo
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echo "Select a DNS server for the clients:"
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echo " 1) Current system resolvers"
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echo " 2) Google Public DNS"
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echo " 3) Cloudflare DNS"
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echo " 4) OpenDNS"
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echo " 5) Quad9"
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echo " 6) AdGuard DNS"
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echo " 7) Custom"
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read -rp "DNS server [2]: " dns
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until [[ -z "$dns" || "$dns" =~ ^[1-7]$ ]]; do
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echo "$dns: invalid selection."
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read -rp "DNS server [2]: " dns
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|
done
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else
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dns=2
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fi
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if [ "$dns" = 7 ]; then
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enter_custom_dns
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fi
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}
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|
|
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set_client_name() {
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# Allow a limited set of characters to avoid conflicts
|
||||||
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client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client")
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||||||
|
}
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||||||
|
|
||||||
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enter_client_name() {
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if [ "$auto" = 0 ]; then
|
||||||
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echo
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||||||
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echo "Enter a name for the first client:"
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||||||
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read -rp "Name [client]: " unsanitized_client
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set_client_name
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[[ -z "$client" ]] && client=client
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else
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client=client
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||||||
|
fi
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}
|
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|
|
||||||
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check_firewall() {
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||||||
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# Install a firewall if firewalld or iptables are not already available
|
||||||
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if ! systemctl is-active --quiet firewalld.service && ! hash iptables 2>/dev/null; then
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||||||
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if [[ "$os" == "centos" || "$os" == "fedora" ]]; then
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|
firewall="firewalld"
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||||||
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# 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
|
||||||
|
echo "Note: firewalld, which is required to manage routing tables, will also be installed."
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||||||
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elif [[ "$os" == "debian" || "$os" == "ubuntu" ]]; then
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||||||
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firewall="iptables"
|
||||||
|
fi
|
||||||
|
fi
|
||||||
|
}
|
||||||
|
|
||||||
abort_and_exit() {
|
abort_and_exit() {
|
||||||
echo "Abort. No changes were made." >&2
|
echo "Abort. No changes were made." >&2
|
||||||
exit 1
|
exit 1
|
||||||
}
|
}
|
||||||
|
|
||||||
|
confirm_setup() {
|
||||||
|
if [ "$auto" = 0 ]; then
|
||||||
|
printf "Do you want to continue? [Y/n] "
|
||||||
|
read -r response
|
||||||
|
case $response in
|
||||||
|
[yY][eE][sS]|[yY]|'')
|
||||||
|
:
|
||||||
|
;;
|
||||||
|
*)
|
||||||
|
abort_and_exit
|
||||||
|
;;
|
||||||
|
esac
|
||||||
|
fi
|
||||||
|
}
|
||||||
|
|
||||||
get_export_dir() {
|
get_export_dir() {
|
||||||
export_to_home_dir=0
|
export_to_home_dir=0
|
||||||
export_dir=~/
|
export_dir=~/
|
||||||
@@ -37,14 +381,28 @@ get_export_dir() {
|
|||||||
fi
|
fi
|
||||||
}
|
}
|
||||||
|
|
||||||
find_public_ip() {
|
new_client() {
|
||||||
ip_url1="http://ipv4.icanhazip.com"
|
get_export_dir
|
||||||
ip_url2="http://ip1.dynupdate.no-ip.com"
|
# Generates the custom client.ovpn
|
||||||
# Get public IP and sanitize with grep
|
{
|
||||||
get_public_ip=$(grep -m 1 -oE '^[0-9]{1,3}(\.[0-9]{1,3}){3}$' <<< "$(wget -T 10 -t 1 -4qO- "$ip_url1" || curl -m 10 -4Ls "$ip_url1")")
|
cat /etc/openvpn/server/client-common.txt
|
||||||
if ! check_ip "$get_public_ip"; then
|
echo "<ca>"
|
||||||
get_public_ip=$(grep -m 1 -oE '^[0-9]{1,3}(\.[0-9]{1,3}){3}$' <<< "$(wget -T 10 -t 1 -4qO- "$ip_url2" || curl -m 10 -4Ls "$ip_url2")")
|
cat /etc/openvpn/server/easy-rsa/pki/ca.crt
|
||||||
|
echo "</ca>"
|
||||||
|
echo "<cert>"
|
||||||
|
sed -ne '/BEGIN CERTIFICATE/,$ p' /etc/openvpn/server/easy-rsa/pki/issued/"$client".crt
|
||||||
|
echo "</cert>"
|
||||||
|
echo "<key>"
|
||||||
|
cat /etc/openvpn/server/easy-rsa/pki/private/"$client".key
|
||||||
|
echo "</key>"
|
||||||
|
echo "<tls-crypt>"
|
||||||
|
sed -ne '/BEGIN OpenVPN Static key/,$ p' /etc/openvpn/server/tc.key
|
||||||
|
echo "</tls-crypt>"
|
||||||
|
} > "$export_dir$client".ovpn
|
||||||
|
if [ "$export_to_home_dir" = 1 ]; then
|
||||||
|
chown "$SUDO_USER:$SUDO_USER" "$export_dir$client".ovpn
|
||||||
fi
|
fi
|
||||||
|
chmod 600 "$export_dir$client".ovpn
|
||||||
}
|
}
|
||||||
|
|
||||||
update_sysctl() {
|
update_sysctl() {
|
||||||
@@ -77,30 +435,6 @@ EOF
|
|||||||
sysctl -e -q -p "$conf_opt"
|
sysctl -e -q -p "$conf_opt"
|
||||||
}
|
}
|
||||||
|
|
||||||
new_client() {
|
|
||||||
get_export_dir
|
|
||||||
# Generates the custom client.ovpn
|
|
||||||
{
|
|
||||||
cat /etc/openvpn/server/client-common.txt
|
|
||||||
echo "<ca>"
|
|
||||||
cat /etc/openvpn/server/easy-rsa/pki/ca.crt
|
|
||||||
echo "</ca>"
|
|
||||||
echo "<cert>"
|
|
||||||
sed -ne '/BEGIN CERTIFICATE/,$ p' /etc/openvpn/server/easy-rsa/pki/issued/"$client".crt
|
|
||||||
echo "</cert>"
|
|
||||||
echo "<key>"
|
|
||||||
cat /etc/openvpn/server/easy-rsa/pki/private/"$client".key
|
|
||||||
echo "</key>"
|
|
||||||
echo "<tls-crypt>"
|
|
||||||
sed -ne '/BEGIN OpenVPN Static key/,$ p' /etc/openvpn/server/tc.key
|
|
||||||
echo "</tls-crypt>"
|
|
||||||
} > "$export_dir$client".ovpn
|
|
||||||
if [ "$export_to_home_dir" = 1 ]; then
|
|
||||||
chown "$SUDO_USER:$SUDO_USER" "$export_dir$client".ovpn
|
|
||||||
fi
|
|
||||||
chmod 600 "$export_dir$client".ovpn
|
|
||||||
}
|
|
||||||
|
|
||||||
show_header() {
|
show_header() {
|
||||||
cat <<'EOF'
|
cat <<'EOF'
|
||||||
|
|
||||||
@@ -154,46 +488,8 @@ if [[ $(uname -r | cut -d "." -f 1) -eq 2 ]]; then
|
|||||||
exiterr "The system is running an old kernel, which is incompatible with this installer."
|
exiterr "The system is running an old kernel, which is incompatible with this installer."
|
||||||
fi
|
fi
|
||||||
|
|
||||||
# Detect OS
|
check_os
|
||||||
if grep -qs "ubuntu" /etc/os-release; then
|
check_os_ver
|
||||||
os="ubuntu"
|
|
||||||
os_version=$(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=$(grep -oE '[0-9]+' /etc/debian_version | head -1)
|
|
||||||
group_name="nogroup"
|
|
||||||
elif [[ -e /etc/almalinux-release || -e /etc/rocky-release || -e /etc/centos-release ]]; then
|
|
||||||
os="centos"
|
|
||||||
os_version=$(grep -shoE '[0-9]+' /etc/almalinux-release /etc/rocky-release /etc/centos-release | head -1)
|
|
||||||
group_name="nobody"
|
|
||||||
elif grep -qs "Amazon Linux release 2" /etc/system-release; then
|
|
||||||
os="centos"
|
|
||||||
os_version="7"
|
|
||||||
group_name="nobody"
|
|
||||||
elif [[ -e /etc/fedora-release ]]; then
|
|
||||||
os="fedora"
|
|
||||||
os_version=$(grep -oE '[0-9]+' /etc/fedora-release | head -1)
|
|
||||||
group_name="nobody"
|
|
||||||
else
|
|
||||||
exiterr "This installer seems to be running on an unsupported distribution.
|
|
||||||
Supported distros are Ubuntu, Debian, AlmaLinux, Rocky Linux, CentOS, Fedora and Amazon Linux 2."
|
|
||||||
fi
|
|
||||||
|
|
||||||
if [[ "$os" == "ubuntu" && "$os_version" -lt 1804 ]]; then
|
|
||||||
exiterr "Ubuntu 18.04 or higher is required to use this installer.
|
|
||||||
This version of Ubuntu is too old and unsupported."
|
|
||||||
fi
|
|
||||||
|
|
||||||
if [[ "$os" == "debian" && "$os_version" -lt 9 ]]; then
|
|
||||||
exiterr "Debian 9 or higher is required to use this installer.
|
|
||||||
This version of Debian is too old and unsupported."
|
|
||||||
fi
|
|
||||||
|
|
||||||
if [[ "$os" == "centos" && "$os_version" -lt 7 ]]; then
|
|
||||||
exiterr "CentOS 7 or higher is required to use this installer.
|
|
||||||
This version of CentOS is too old and unsupported."
|
|
||||||
fi
|
|
||||||
|
|
||||||
if [[ ! -e /dev/net/tun ]] || ! ( exec 7<>/dev/net/tun ) 2>/dev/null; then
|
if [[ ! -e /dev/net/tun ]] || ! ( exec 7<>/dev/net/tun ) 2>/dev/null; then
|
||||||
exiterr "The system does not have the TUN device available.
|
exiterr "The system does not have the TUN device available.
|
||||||
@@ -202,12 +498,7 @@ fi
|
|||||||
|
|
||||||
auto=0
|
auto=0
|
||||||
if [[ ! -e /etc/openvpn/server/server.conf ]]; then
|
if [[ ! -e /etc/openvpn/server/server.conf ]]; then
|
||||||
if [ "$os" = "centos" ]; then
|
check_nftables
|
||||||
if grep -qs "hwdsl2 VPN script" /etc/sysconfig/nftables.conf \
|
|
||||||
|| systemctl is-active --quiet nftables 2>/dev/null; then
|
|
||||||
exiterr "This system has nftables enabled, which is not supported by this installer."
|
|
||||||
fi
|
|
||||||
fi
|
|
||||||
while [ "$#" -gt 0 ]; do
|
while [ "$#" -gt 0 ]; do
|
||||||
case $1 in
|
case $1 in
|
||||||
--auto)
|
--auto)
|
||||||
@@ -222,244 +513,23 @@ if [[ ! -e /etc/openvpn/server/server.conf ]]; then
|
|||||||
;;
|
;;
|
||||||
esac
|
esac
|
||||||
done
|
done
|
||||||
# Detect some Debian minimal setups where neither wget nor curl are installed
|
install_wget
|
||||||
if ! hash wget 2>/dev/null && ! hash curl 2>/dev/null; then
|
install_iproute
|
||||||
if [ "$auto" = 0 ]; then
|
show_start_setup
|
||||||
echo "Wget is required to use this installer."
|
detect_ip
|
||||||
read -n1 -r -p "Press any key to install Wget and continue..."
|
check_nat_ip
|
||||||
fi
|
show_config
|
||||||
export DEBIAN_FRONTEND=noninteractive
|
detect_ipv6
|
||||||
(
|
select_protocol
|
||||||
set -x
|
select_port
|
||||||
apt-get -yqq update || apt-get -yqq update
|
select_dns
|
||||||
apt-get -yqq install wget >/dev/null
|
enter_client_name
|
||||||
) || exiterr2
|
|
||||||
fi
|
|
||||||
if ! hash ip 2>/dev/null; then
|
|
||||||
if [ "$auto" = 0 ]; then
|
|
||||||
echo "iproute is required to use this installer."
|
|
||||||
read -n1 -r -p "Press any key to install iproute and continue..."
|
|
||||||
fi
|
|
||||||
if [ "$os" = "debian" ] || [ "$os" = "ubuntu" ]; then
|
|
||||||
export DEBIAN_FRONTEND=noninteractive
|
|
||||||
(
|
|
||||||
set -x
|
|
||||||
apt-get -yqq update || apt-get -yqq update
|
|
||||||
apt-get -yqq install iproute2 >/dev/null
|
|
||||||
) || exiterr2
|
|
||||||
else
|
|
||||||
(
|
|
||||||
set -x
|
|
||||||
yum -y -q install iproute >/dev/null
|
|
||||||
) || exiterr3
|
|
||||||
fi
|
|
||||||
fi
|
|
||||||
if [ "$auto" = 0 ]; then
|
|
||||||
echo
|
|
||||||
echo 'Welcome to this OpenVPN server installer!'
|
|
||||||
echo 'GitHub: https://github.com/hwdsl2/openvpn-install'
|
|
||||||
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.'
|
|
||||||
else
|
|
||||||
show_header
|
|
||||||
echo
|
|
||||||
echo 'Starting OpenVPN setup using default options.'
|
|
||||||
fi
|
|
||||||
# If system has a single IPv4, it is selected automatically.
|
|
||||||
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
|
|
||||||
# Use the IP address on the default route
|
|
||||||
ip=$(ip -4 route get 1 | sed 's/ uid .*//' | awk '{print $NF;exit}' 2>/dev/null)
|
|
||||||
if ! check_ip "$ip"; then
|
|
||||||
find_public_ip
|
|
||||||
ip_match=0
|
|
||||||
if [ -n "$get_public_ip" ]; then
|
|
||||||
ip_list=$(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}')
|
|
||||||
while IFS= read -r line; do
|
|
||||||
if [ "$line" = "$get_public_ip" ]; then
|
|
||||||
ip_match=1
|
|
||||||
ip="$line"
|
|
||||||
fi
|
|
||||||
done <<< "$ip_list"
|
|
||||||
fi
|
|
||||||
if [ "$ip_match" = 0 ]; then
|
|
||||||
if [ "$auto" = 0 ]; then
|
|
||||||
echo
|
|
||||||
echo "Which IPv4 address should be used?"
|
|
||||||
number_of_ip=$(ip -4 addr | grep inet | grep -vEc '127(\.[0-9]{1,3}){3}')
|
|
||||||
ip -4 addr | grep inet | grep -vE '127(\.[0-9]{1,3}){3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}(\.[0-9]{1,3}){3}' | nl -s ') '
|
|
||||||
read -rp "IPv4 address [1]: " ip_number
|
|
||||||
until [[ -z "$ip_number" || "$ip_number" =~ ^[0-9]+$ && "$ip_number" -le "$number_of_ip" ]]; do
|
|
||||||
echo "$ip_number: invalid selection."
|
|
||||||
read -rp "IPv4 address [1]: " ip_number
|
|
||||||
done
|
|
||||||
[[ -z "$ip_number" ]] && ip_number=1
|
|
||||||
else
|
|
||||||
ip_number=1
|
|
||||||
fi
|
|
||||||
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
|
|
||||||
fi
|
|
||||||
fi
|
|
||||||
if ! check_ip "$ip"; then
|
|
||||||
echo "Error: Could not detect this server's IP address." >&2
|
|
||||||
echo "Abort. No changes were made." >&2
|
|
||||||
exit 1
|
|
||||||
fi
|
|
||||||
# If $ip is a private IP address, the server must be behind NAT
|
|
||||||
if printf '%s' "$ip" | grep -qE '^(10|127|172\.(1[6-9]|2[0-9]|3[0-1])|192\.168|169\.254)\.'; then
|
|
||||||
find_public_ip
|
|
||||||
if ! check_ip "$get_public_ip"; then
|
|
||||||
if [ "$auto" = 0 ]; then
|
|
||||||
echo
|
|
||||||
echo "This server is behind NAT. What is the public IPv4 address?"
|
|
||||||
read -rp "Public IPv4 address: " public_ip
|
|
||||||
until check_ip "$public_ip"; do
|
|
||||||
echo "Invalid input."
|
|
||||||
read -rp "Public IPv4 address: " public_ip
|
|
||||||
done
|
|
||||||
else
|
|
||||||
echo "Error: Could not detect this server's public IP." >&2
|
|
||||||
echo "Abort. No changes were made." >&2
|
|
||||||
exit 1
|
|
||||||
fi
|
|
||||||
else
|
|
||||||
public_ip="$get_public_ip"
|
|
||||||
fi
|
|
||||||
fi
|
|
||||||
if [ "$auto" != 0 ]; then
|
|
||||||
echo
|
|
||||||
printf '%s' "Server IP: "
|
|
||||||
[ -n "$public_ip" ] && printf '%s\n' "$public_ip" || printf '%s\n' "$ip"
|
|
||||||
echo "Port: UDP/1194"
|
|
||||||
echo "Client name: client"
|
|
||||||
echo "Client DNS: Google Public DNS"
|
|
||||||
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 [[ $(ip -6 addr | grep -c 'inet6 [23]') -gt 1 ]]; then
|
|
||||||
if [ "$auto" = 0 ]; then
|
|
||||||
echo
|
|
||||||
echo "Which IPv6 address should be used?"
|
|
||||||
number_of_ip6=$(ip -6 addr | grep -c 'inet6 [23]')
|
|
||||||
ip -6 addr | grep 'inet6 [23]' | cut -d '/' -f 1 | grep -oE '([0-9a-fA-F]{0,4}:){1,7}[0-9a-fA-F]{0,4}' | nl -s ') '
|
|
||||||
read -rp "IPv6 address [1]: " ip6_number
|
|
||||||
until [[ -z "$ip6_number" || "$ip6_number" =~ ^[0-9]+$ && "$ip6_number" -le "$number_of_ip6" ]]; do
|
|
||||||
echo "$ip6_number: invalid selection."
|
|
||||||
read -rp "IPv6 address [1]: " ip6_number
|
|
||||||
done
|
|
||||||
[[ -z "$ip6_number" ]] && ip6_number=1
|
|
||||||
else
|
|
||||||
ip6_number=1
|
|
||||||
fi
|
|
||||||
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
|
|
||||||
if [ "$auto" = 0 ]; then
|
|
||||||
echo
|
|
||||||
echo "Which protocol should OpenVPN use?"
|
|
||||||
echo " 1) UDP (recommended)"
|
|
||||||
echo " 2) TCP"
|
|
||||||
read -rp "Protocol [1]: " protocol
|
|
||||||
until [[ -z "$protocol" || "$protocol" =~ ^[12]$ ]]; do
|
|
||||||
echo "$protocol: invalid selection."
|
|
||||||
read -rp "Protocol [1]: " protocol
|
|
||||||
done
|
|
||||||
else
|
|
||||||
protocol=1
|
|
||||||
fi
|
|
||||||
case "$protocol" in
|
|
||||||
1|"")
|
|
||||||
protocol=udp
|
|
||||||
;;
|
|
||||||
2)
|
|
||||||
protocol=tcp
|
|
||||||
;;
|
|
||||||
esac
|
|
||||||
if [ "$auto" = 0 ]; then
|
|
||||||
echo
|
|
||||||
echo "What port should OpenVPN listen to?"
|
|
||||||
read -rp "Port [1194]: " port
|
|
||||||
until [[ -z "$port" || "$port" =~ ^[0-9]+$ && "$port" -le 65535 ]]; do
|
|
||||||
echo "$port: invalid port."
|
|
||||||
read -rp "Port [1194]: " port
|
|
||||||
done
|
|
||||||
[[ -z "$port" ]] && port=1194
|
|
||||||
else
|
|
||||||
port=1194
|
|
||||||
fi
|
|
||||||
if [ "$auto" = 0 ]; then
|
|
||||||
echo
|
|
||||||
echo "Select a DNS server for the clients:"
|
|
||||||
echo " 1) Current system resolvers"
|
|
||||||
echo " 2) Google Public DNS"
|
|
||||||
echo " 3) Cloudflare DNS"
|
|
||||||
echo " 4) OpenDNS"
|
|
||||||
echo " 5) Quad9"
|
|
||||||
echo " 6) AdGuard DNS"
|
|
||||||
echo " 7) Custom"
|
|
||||||
read -rp "DNS server [2]: " dns
|
|
||||||
until [[ -z "$dns" || "$dns" =~ ^[1-7]$ ]]; do
|
|
||||||
echo "$dns: invalid selection."
|
|
||||||
read -rp "DNS server [2]: " dns
|
|
||||||
done
|
|
||||||
else
|
|
||||||
dns=2
|
|
||||||
fi
|
|
||||||
if [ "$dns" = 7 ]; then
|
|
||||||
read -rp "Enter primary DNS server: " dns1
|
|
||||||
until check_ip "$dns1"; do
|
|
||||||
echo "Invalid DNS server."
|
|
||||||
read -rp "Enter primary DNS server: " dns1
|
|
||||||
done
|
|
||||||
read -rp "Enter secondary DNS server (Enter to skip): " dns2
|
|
||||||
until [ -z "$dns2" ] || check_ip "$dns2"; do
|
|
||||||
echo "Invalid DNS server."
|
|
||||||
read -rp "Enter secondary DNS server (Enter to skip): " dns2
|
|
||||||
done
|
|
||||||
fi
|
|
||||||
if [ "$auto" = 0 ]; then
|
|
||||||
echo
|
|
||||||
echo "Enter a name for the first client:"
|
|
||||||
read -rp "Name [client]: " unsanitized_client
|
|
||||||
# Allow a limited set of characters to avoid conflicts
|
|
||||||
client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client")
|
|
||||||
[[ -z "$client" ]] && client=client
|
|
||||||
else
|
|
||||||
client=client
|
|
||||||
fi
|
|
||||||
if [ "$auto" = 0 ]; then
|
if [ "$auto" = 0 ]; then
|
||||||
echo
|
echo
|
||||||
echo "OpenVPN installation is ready to begin."
|
echo "OpenVPN installation is ready to begin."
|
||||||
fi
|
fi
|
||||||
# Install a firewall if firewalld or iptables are not already available
|
check_firewall
|
||||||
if ! systemctl is-active --quiet firewalld.service && ! hash iptables 2>/dev/null; then
|
confirm_setup
|
||||||
if [[ "$os" == "centos" || "$os" == "fedora" ]]; then
|
|
||||||
firewall="firewalld"
|
|
||||||
# We don't want to silently enable firewalld, so we give a subtle warning
|
|
||||||
# If the user continues, firewalld will be installed and enabled during setup
|
|
||||||
echo
|
|
||||||
echo "Note: firewalld, which is required to manage routing tables, will also be installed."
|
|
||||||
elif [[ "$os" == "debian" || "$os" == "ubuntu" ]]; then
|
|
||||||
firewall="iptables"
|
|
||||||
fi
|
|
||||||
fi
|
|
||||||
if [ "$auto" = 0 ]; then
|
|
||||||
printf "Do you want to continue? [Y/n] "
|
|
||||||
read -r response
|
|
||||||
case $response in
|
|
||||||
[yY][eE][sS]|[yY]|'')
|
|
||||||
:
|
|
||||||
;;
|
|
||||||
*)
|
|
||||||
abort_and_exit
|
|
||||||
;;
|
|
||||||
esac
|
|
||||||
fi
|
|
||||||
echo
|
echo
|
||||||
echo "Installing OpenVPN, please wait..."
|
echo "Installing OpenVPN, please wait..."
|
||||||
# If running inside a container, disable LimitNPROC to prevent conflicts
|
# If running inside a container, disable LimitNPROC to prevent conflicts
|
||||||
@@ -750,12 +820,12 @@ else
|
|||||||
echo "Provide a name for the client:"
|
echo "Provide a name for the client:"
|
||||||
read -rp "Name: " unsanitized_client
|
read -rp "Name: " unsanitized_client
|
||||||
[ -z "$unsanitized_client" ] && abort_and_exit
|
[ -z "$unsanitized_client" ] && abort_and_exit
|
||||||
client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client")
|
set_client_name
|
||||||
while [[ -z "$client" || -e /etc/openvpn/server/easy-rsa/pki/issued/"$client".crt ]]; do
|
while [[ -z "$client" || -e /etc/openvpn/server/easy-rsa/pki/issued/"$client".crt ]]; do
|
||||||
echo "$client: invalid name."
|
echo "$client: invalid name."
|
||||||
read -rp "Name: " unsanitized_client
|
read -rp "Name: " unsanitized_client
|
||||||
[ -z "$unsanitized_client" ] && abort_and_exit
|
[ -z "$unsanitized_client" ] && abort_and_exit
|
||||||
client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client")
|
set_client_name
|
||||||
done
|
done
|
||||||
cd /etc/openvpn/server/easy-rsa/ || exit 1
|
cd /etc/openvpn/server/easy-rsa/ || exit 1
|
||||||
(
|
(
|
||||||
|
|||||||
Reference in New Issue
Block a user