mirror of
https://github.com/hwdsl2/openvpn-install.git
synced 2024-05-28 17:03:30 +02:00
Improve setup
- Refactor setup script into functions for better readability and easier maintenance.
This commit is contained in:
hwdsl2
parent
6bdb4cc635
commit
824d59772e
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@ -20,11 +20,355 @@ check_ip() {
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printf '%s' "$1" | tr -d '\n' | grep -Eq "$IP_REGEX"
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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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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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enter_client_name() {
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if [ "$auto" = 0 ]; then
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echo
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echo "Enter a name for the first client:"
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read -rp "Name [client]: " unsanitized_client
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set_client_name
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[[ -z "$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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check_firewall() {
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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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if [[ "$os" == "centos" || "$os" == "fedora" ]]; then
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firewall="firewalld"
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# We don't want to silently enable firewalld, so we give a subtle warning
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# If the user continues, firewalld will be installed and enabled during setup
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echo
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echo "Note: firewalld, which is required to manage routing tables, will also be installed."
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elif [[ "$os" == "debian" || "$os" == "ubuntu" ]]; then
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firewall="iptables"
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fi
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fi
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}
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abort_and_exit() {
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echo "Abort. No changes were made." >&2
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exit 1
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}
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confirm_setup() {
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if [ "$auto" = 0 ]; then
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printf "Do you want to continue? [Y/n] "
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read -r response
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case $response in
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[yY][eE][sS]|[yY]|'')
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:
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;;
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*)
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abort_and_exit
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;;
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esac
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fi
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}
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get_export_dir() {
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export_to_home_dir=0
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export_dir=~/
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@ -37,14 +381,28 @@ get_export_dir() {
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fi
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}
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find_public_ip() {
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ip_url1="http://ipv4.icanhazip.com"
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ip_url2="http://ip1.dynupdate.no-ip.com"
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# Get public IP and sanitize with grep
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get_public_ip=$(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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new_client() {
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get_export_dir
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# Generates the custom client.ovpn
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{
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cat /etc/openvpn/server/client-common.txt
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echo "<ca>"
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cat /etc/openvpn/server/easy-rsa/pki/ca.crt
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echo "</ca>"
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echo "<cert>"
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sed -ne '/BEGIN CERTIFICATE/,$ p' /etc/openvpn/server/easy-rsa/pki/issued/"$client".crt
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echo "</cert>"
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echo "<key>"
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cat /etc/openvpn/server/easy-rsa/pki/private/"$client".key
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echo "</key>"
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echo "<tls-crypt>"
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sed -ne '/BEGIN OpenVPN Static key/,$ p' /etc/openvpn/server/tc.key
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echo "</tls-crypt>"
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} > "$export_dir$client".ovpn
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if [ "$export_to_home_dir" = 1 ]; then
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chown "$SUDO_USER:$SUDO_USER" "$export_dir$client".ovpn
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fi
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chmod 600 "$export_dir$client".ovpn
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}
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update_sysctl() {
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@ -77,30 +435,6 @@ EOF
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sysctl -e -q -p "$conf_opt"
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}
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new_client() {
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get_export_dir
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# Generates the custom client.ovpn
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{
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cat /etc/openvpn/server/client-common.txt
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echo "<ca>"
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cat /etc/openvpn/server/easy-rsa/pki/ca.crt
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echo "</ca>"
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echo "<cert>"
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sed -ne '/BEGIN CERTIFICATE/,$ p' /etc/openvpn/server/easy-rsa/pki/issued/"$client".crt
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echo "</cert>"
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echo "<key>"
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cat /etc/openvpn/server/easy-rsa/pki/private/"$client".key
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echo "</key>"
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echo "<tls-crypt>"
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sed -ne '/BEGIN OpenVPN Static key/,$ p' /etc/openvpn/server/tc.key
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echo "</tls-crypt>"
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} > "$export_dir$client".ovpn
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if [ "$export_to_home_dir" = 1 ]; then
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chown "$SUDO_USER:$SUDO_USER" "$export_dir$client".ovpn
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fi
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chmod 600 "$export_dir$client".ovpn
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}
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show_header() {
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cat <<'EOF'
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|
|
@ -154,46 +488,8 @@ if [[ $(uname -r | cut -d "." -f 1) -eq 2 ]]; then
|
|||
exiterr "The system is running an old kernel, which is incompatible with this installer."
|
||||
fi
|
||||
|
||||
# Detect OS
|
||||
if grep -qs "ubuntu" /etc/os-release; then
|
||||
os="ubuntu"
|
||||
os_version=$(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=$(grep -oE '[0-9]+' /etc/debian_version | head -1)
|
||||
group_name="nogroup"
|
||||
elif [[ -e /etc/almalinux-release || -e /etc/rocky-release || -e /etc/centos-release ]]; then
|
||||
os="centos"
|
||||
os_version=$(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" && "$os_version" -lt 7 ]]; then
|
||||
exiterr "CentOS 7 or higher is required to use this installer.
|
||||
This version of CentOS is too old and unsupported."
|
||||
fi
|
||||
check_os
|
||||
check_os_ver
|
||||
|
||||
if [[ ! -e /dev/net/tun ]] || ! ( exec 7<>/dev/net/tun ) 2>/dev/null; then
|
||||
exiterr "The system does not have the TUN device available.
|
||||
|
|
@ -202,12 +498,7 @@ fi
|
|||
|
||||
auto=0
|
||||
if [[ ! -e /etc/openvpn/server/server.conf ]]; then
|
||||
if [ "$os" = "centos" ]; then
|
||||
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
|
||||
check_nftables
|
||||
while [ "$#" -gt 0 ]; do
|
||||
case $1 in
|
||||
--auto)
|
||||
|
|
@ -222,244 +513,23 @@ if [[ ! -e /etc/openvpn/server/server.conf ]]; then
|
|||
;;
|
||||
esac
|
||||
done
|
||||
# Detect some Debian minimal setups where neither wget nor curl are installed
|
||||
if ! hash wget 2>/dev/null && ! hash curl 2>/dev/null; then
|
||||
if [ "$auto" = 0 ]; then
|
||||
echo "Wget is required to use this installer."
|
||||
read -n1 -r -p "Press any key to install Wget and continue..."
|
||||
fi
|
||||
export DEBIAN_FRONTEND=noninteractive
|
||||
(
|
||||
set -x
|
||||
apt-get -yqq update || apt-get -yqq update
|
||||
apt-get -yqq install wget >/dev/null
|
||||
) || 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 "$client" ]] && client=client
|
||||
else
|
||||
client=client
|
||||
fi
|
||||
install_wget
|
||||
install_iproute
|
||||
show_start_setup
|
||||
detect_ip
|
||||
check_nat_ip
|
||||
show_config
|
||||
detect_ipv6
|
||||
select_protocol
|
||||
select_port
|
||||
select_dns
|
||||
enter_client_name
|
||||
if [ "$auto" = 0 ]; then
|
||||
echo
|
||||
echo "OpenVPN installation is ready to begin."
|
||||
fi
|
||||
# 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
|
||||
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 $response in
|
||||
[yY][eE][sS]|[yY]|'')
|
||||
:
|
||||
;;
|
||||
*)
|
||||
abort_and_exit
|
||||
;;
|
||||
esac
|
||||
fi
|
||||
check_firewall
|
||||
confirm_setup
|
||||
echo
|
||||
echo "Installing OpenVPN, please wait..."
|
||||
# If running inside a container, disable LimitNPROC to prevent conflicts
|
||||
|
|
@ -750,12 +820,12 @@ else
|
|||
echo "Provide a name for the client:"
|
||||
read -rp "Name: " unsanitized_client
|
||||
[ -z "$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
|
||||
echo "$client: invalid name."
|
||||
read -rp "Name: " unsanitized_client
|
||||
[ -z "$unsanitized_client" ] && abort_and_exit
|
||||
client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client")
|
||||
set_client_name
|
||||
done
|
||||
cd /etc/openvpn/server/easy-rsa/ || exit 1
|
||||
(
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user