mirror of
https://github.com/hwdsl2/openvpn-install.git
synced 2024-07-02 17:55:47 +02:00
Support auto install
- Support automatic install using default options. To do this, users can add the argument "--auto" when running the script. - Cleanup
This commit is contained in:
hwdsl2
parent
1b20eadf22
commit
01865085c6
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@ -120,12 +120,12 @@ find_public_ip() {
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fi
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}
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abort_and_exit () {
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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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get_export_dir () {
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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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if [ -n "$SUDO_USER" ] && getent group "$SUDO_USER" >/dev/null 2>&1; then
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@ -137,7 +137,7 @@ get_export_dir () {
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fi
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}
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update_sysctl () {
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update_sysctl() {
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# Enable net.ipv4.ip_forward for the system
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echo 'net.ipv4.ip_forward=1' > /etc/sysctl.d/99-openvpn-forward.conf
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if [[ -n "$ip6" ]]; then
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@ -166,7 +166,7 @@ EOF
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sysctl -e -q -p /etc/sysctl.d/99-openvpn-optimize.conf
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}
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new_client () {
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new_client() {
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get_export_dir
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# Generates the custom client.ovpn
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{
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@ -198,10 +198,25 @@ if [[ ! -e /etc/openvpn/server/server.conf ]]; then
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exit 1
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fi
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fi
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auto=0
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while [ "$#" -gt 0 ]; do
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case $1 in
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--auto)
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auto=1
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shift
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;;
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*)
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echo "Unknown parameter: $1" >&2
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exit 1
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;;
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esac
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done
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# Detect some Debian minimal setups where neither wget nor curl are installed
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if ! hash wget 2>/dev/null && ! hash curl 2>/dev/null; then
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echo "Wget is required to use this installer."
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read -n1 -r -p "Press any key to install Wget and continue..."
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if [ "$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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@ -209,11 +224,16 @@ if [[ ! -e /etc/openvpn/server/server.conf ]]; then
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apt-get -yqq install wget >/dev/null
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) || exit 1
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fi
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echo
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echo 'Welcome to this OpenVPN server installer!'
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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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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
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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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echo
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echo 'Starting OpenVPN setup using default options.'
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fi
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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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@ -233,16 +253,20 @@ if [[ ! -e /etc/openvpn/server/server.conf ]]; then
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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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number_of_ip=$(ip -4 addr | grep inet | grep -vEc '127(\.[0-9]{1,3}){3}')
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echo
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echo "Which IPv4 address should be used?"
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ip -4 addr | grep inet | grep -vE '127(\.[0-9]{1,3}){3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}(\.[0-9]{1,3}){3}' | nl -s ') '
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read -rp "IPv4 address [1]: " ip_number
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until [[ -z "$ip_number" || "$ip_number" =~ ^[0-9]+$ && "$ip_number" -le "$number_of_ip" ]]; do
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echo "$ip_number: invalid selection."
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if [ "$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=$(ip -4 addr | grep inet | grep -vEc '127(\.[0-9]{1,3}){3}')
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ip -4 addr | grep inet | grep -vE '127(\.[0-9]{1,3}){3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}(\.[0-9]{1,3}){3}' | nl -s ') '
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read -rp "IPv4 address [1]: " ip_number
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done
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[[ -z "$ip_number" ]] && ip_number="1"
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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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@ -251,44 +275,66 @@ if [[ ! -e /etc/openvpn/server/server.conf ]]; then
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if printf '%s' "$ip" | grep -qE '^(10|127|172\.(1[6-9]|2[0-9]|3[0-1])|192\.168|169\.254)\.'; then
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find_public_ip
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if [ -z "$get_public_ip" ]; 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 "$public_ip"; do
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echo "Invalid input."
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if [ "$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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done
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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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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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# 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 [[ $(ip -6 addr | grep -c 'inet6 [23]') -gt 1 ]]; then
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number_of_ip6=$(ip -6 addr | grep -c 'inet6 [23]')
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echo
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echo "Which IPv6 address should be used?"
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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 "$ip6_number: invalid selection."
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if [ "$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=$(ip -6 addr | grep -c 'inet6 [23]')
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ip -6 addr | grep 'inet6 [23]' | cut -d '/' -f 1 | grep -oE '([0-9a-fA-F]{0,4}:){1,7}[0-9a-fA-F]{0,4}' | nl -s ') '
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read -rp "IPv6 address [1]: " ip6_number
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done
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[[ -z "$ip6_number" ]] && ip6_number="1"
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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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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 "$protocol: invalid selection."
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if [ "$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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done
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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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@ -297,28 +343,36 @@ if [[ ! -e /etc/openvpn/server/server.conf ]]; then
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protocol=tcp
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;;
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esac
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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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if [ "$auto" = 0 ]; then
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echo
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echo "What port should OpenVPN listen to?"
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read -rp "Port [1194]: " port
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done
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[[ -z "$port" ]] && port="1194"
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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 "$dns: invalid selection."
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until [[ -z "$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 "$port" ]] && port=1194
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else
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port=1194
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fi
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if [ "$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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done
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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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read -rp "Enter primary DNS server: " dns1
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until check_ip "$dns1"; do
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@ -331,27 +385,36 @@ if [[ ! -e /etc/openvpn/server/server.conf ]]; then
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read -rp "Enter secondary DNS server (Enter to skip): " dns2
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done
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fi
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echo
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echo "Enter a name for the first client:"
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read -rp "Name [client]: " unsanitized_client
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# Allow a limited set of characters to avoid conflicts
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client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client")
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[[ -z "$client" ]] && client="client"
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echo
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echo "OpenVPN installation is ready to begin."
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if [ "$auto" = 0 ]; then
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echo
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echo "Enter a name for the first client:"
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read -rp "Name [client]: " unsanitized_client
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# Allow a limited set of characters to avoid conflicts
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client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client")
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[[ -z "$client" ]] && client=client
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else
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client=client
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fi
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if [ "$auto" = 0 ]; then
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echo
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echo "OpenVPN installation is ready to begin."
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fi
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# Install a firewall if firewalld or iptables are not already available
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if ! systemctl is-active --quiet firewalld.service && ! hash iptables 2>/dev/null; then
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if [[ "$os" == "centos" || "$os" == "fedora" ]]; then
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firewall="firewalld"
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# We don't want to silently enable firewalld, so we give a subtle warning
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# If the user continues, firewalld will be installed and enabled during setup
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echo "firewalld, which is required to manage routing tables, will also be installed."
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echo
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echo "Note: firewalld, which is required to manage routing tables, will also be installed."
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elif [[ "$os" == "debian" || "$os" == "ubuntu" ]]; then
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# iptables is way less invasive than firewalld so no warning is given
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firewall="iptables"
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fi
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fi
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read -n1 -r -p "Press any key to continue..."
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if [ "$auto" = 0 ]; then
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read -n1 -r -p "Press any key to continue..."
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fi
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echo
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echo "Installing OpenVPN, please wait..."
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# If running inside a container, disable LimitNPROC to prevent conflicts
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