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Create Openvpn_install_updated.sh
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Openvpn_install_updated.sh
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543
Openvpn_install_updated.sh
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#!/bin/bash
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#
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# https://github.com/Nyr/openvpn-install
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#
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# Copyright (c) 2013 Nyr. Released under the MIT License.
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# Detect Debian users running the script with "sh" instead of bash
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if readlink /proc/$$/exe | grep -q "dash"; then
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echo "This script needs to be run with bash, not sh"
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exit
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fi
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if [[ "$EUID" -ne 0 ]]; then
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echo "Sorry, you need to run this as root"
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exit
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fi
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# Detect OS
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# $os_version variables aren't always in use, but are kept here for convenience
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if grep -qs "ubuntu" /etc/os-release; then
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os="ubuntu"
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os_version=$(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=$(grep -oE '[0-9]+' /etc/debian_version | head -1)
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group_name="nogroup"
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elif [[ -e /etc/centos-release ]]; then
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os="centos"
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os_version=$(grep -oE '[0-9]+' /etc/centos-release | head -1)
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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=$(grep -oE '[0-9]+' /etc/fedora-release | head -1)
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group_name="nobody"
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else
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echo "Looks like you aren't running this installer on Ubuntu, Debian, CentOS or Fedora"
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exit
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fi
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if [[ "$os" == "ubuntu" && "$os_version" -lt 1804 ]]; then
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echo "Ubuntu 18.04 or higher is required to use this installer
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This version of Ubuntu is too old and unsupported"
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exit
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fi
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if [[ "$os" == "debian" && "$os_version" -lt 9 ]]; then
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echo "Debian 9 or higher is required to use this installer
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This version of Debian is too old and unsupported"
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exit
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fi
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if [[ "$os" == "centos" && "$os_version" -lt 7 ]]; then
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echo "CentOS 7 or higher is required to use this installer
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This version of CentOS is too old and unsupported"
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exit
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fi
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if [[ ! -e /dev/net/tun ]]; then
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echo "The TUN device is not available
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You need to enable TUN before running this script"
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exit
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fi
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new_client () {
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# Generates the custom client.ovpn
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{
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cat /etc/openvpn/server/client-common.txt
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echo "<ca>"
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cat /etc/openvpn/server/easy-rsa/pki/ca.crt
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echo "</ca>"
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echo "<cert>"
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sed -ne '/BEGIN CERTIFICATE/,$ 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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} > ~/"$client".ovpn
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}
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if [[ ! -e /etc/openvpn/server/server.conf ]]; then
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clear
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echo 'Welcome to this OpenVPN road warrior 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 system has a single IPv4, it is selected automatically. Else, ask the user
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if [[ $(ip -4 addr | grep inet | grep -vEc '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}') -eq 1 ]]; then
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ip=$(ip -4 addr | grep inet | grep -vE '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}')
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else
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number_of_ip=$(ip -4 addr | grep inet | grep -vEc '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}')
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echo
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echo "What IPv4 address should the OpenVPN server use?"
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ip -4 addr | grep inet | grep -vE '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | nl -s ') '
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read -p "IPv4 address [1]: " ip_number
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until [[ -z "$ip_number" || "$ip_number" =~ ^[0-9]+$ && "$ip_number" -le "$number_of_ip" ]]; do
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echo "$ip_number: invalid selection."
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read -p "IPv4 address [1]: " ip_number
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done
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[[ -z "$ip_number" ]] && ip_number="1"
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ip=$(ip -4 addr | grep inet | grep -vE '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | sed -n "$ip_number"p)
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fi
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# If $ip is a private IP address, the server must be behind NAT
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if echo "$ip" | grep -qE '^(10\.|172\.1[6789]\.|172\.2[0-9]\.|172\.3[01]\.|192\.168)'; then
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echo
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echo "This server is behind NAT. What is the public IPv4 address or hostname?"
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# Get public IP and sanitize with grep
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get_public_ip=$(grep -m 1 -oE '^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$' <<< "$(wget -T 10 -t 1 -4qO- "http://ip1.dynupdate.no-ip.com/" || curl -m 10 -4Ls "http://ip1.dynupdate.no-ip.com/")")
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read -p "Public IPv4 address / hostname [$get_public_ip]: " public_ip
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# If the checkip service is unavailable and user didn't provide input, ask again
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until [[ -n "$get_public_ip" || -n $public_ip ]]; do
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echo "Invalid input."
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read -p "Public IPv4 address / hostname: " public_ip
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done
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[[ -z "$public_ip" ]] && public_ip="$get_public_ip"
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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 "What IPv6 address should the OpenVPN server use?"
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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 -p "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 "$ip6_number: invalid selection."
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read -p "IPv6 address [1]: " ip6_number
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done
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[[ -z "$ip6_number" ]] && ip6_number="1"
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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 do you want for OpenVPN connections?"
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echo " 1) UDP (recommended)"
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echo " 2) TCP"
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read -p "Protocol [1]: " protocol
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until [[ -z "$protocol" || "$protocol" =~ ^[12]$ ]]; do
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echo "$protocol: invalid selection."
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read -p "Protocol [1]: " protocol
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done
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case "$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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echo
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echo "What port do you want OpenVPN listening to?"
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read -p "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 -p "Port [1194]: " port
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done
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[[ -z "$port" ]] && port="1194"
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echo
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echo "Which DNS do you want to use with the VPN?"
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echo " 1) Current system resolvers"
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echo " 2) 1.1.1.1"
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echo " 3) Google"
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echo " 4) OpenDNS"
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echo " 5) NTT"
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echo " 6) AdGuard"
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read -p "DNS [1]: " dns
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until [[ -z "$dns" || "$dns" =~ ^[1-6]$ ]]; do
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echo "$dns: invalid selection."
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read -p "DNS [1]: " dns
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done
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echo
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echo "Finally, tell me a name for the client certificate."
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read -p "Client name [client]: " unsanitized_client
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# Allow a limited set of characters to avoid conflicts
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client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client")
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[[ -z "$client" ]] && client="client"
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echo
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echo "We are ready to set up your OpenVPN server now."
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# Install a firewall in the rare case where one is 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 "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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echo
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read -n1 -r -p "Press any key to continue..."
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# If running inside a container, disable LimitNPROC to prevent conflicts
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if systemd-detect-virt -cq; then
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mkdir /etc/systemd/system/openvpn-server@server.service.d/ 2>/dev/null
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echo "[Service]
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LimitNPROC=infinity" > /etc/systemd/system/openvpn-server@server.service.d/disable-limitnproc.conf
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fi
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if [[ "$os" = "debian" || "$os" = "ubuntu" ]]; then
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apt-get update
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apt-get install -y openvpn openssl ca-certificates $firewall
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elif [[ "$os" = "centos" ]]; then
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yum install -y epel-release
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yum install -y openvpn openssl ca-certificates tar $firewall
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else
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# Else, OS must be Fedora
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dnf install -y openvpn openssl ca-certificates tar $firewall
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fi
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# If firewalld was just installed, enable it
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if [[ "$firewall" == "firewalld" ]]; then
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systemctl enable --now firewalld.service
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fi
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# Get easy-rsa
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easy_rsa_url='https://github.com/OpenVPN/easy-rsa/releases/download/v3.0.7/EasyRSA-3.0.7.tgz'
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wget -O ~/easyrsa.tgz "$easy_rsa_url" 2>/dev/null || curl -Lo ~/easyrsa.tgz "$easy_rsa_url"
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tar xzf ~/easyrsa.tgz -C ~/
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mv ~/EasyRSA-3.0.7/ /etc/openvpn/server/
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mv /etc/openvpn/server/EasyRSA-3.0.7/ /etc/openvpn/server/easy-rsa/
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chown -R root:root /etc/openvpn/server/easy-rsa/
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rm -f ~/easyrsa.tgz
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cd /etc/openvpn/server/easy-rsa/
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# Create the PKI, set up the CA and the server and client certificates
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./easyrsa init-pki
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./easyrsa --batch build-ca nopass
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EASYRSA_CERT_EXPIRE=3650 ./easyrsa build-server-full server nopass
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EASYRSA_CERT_EXPIRE=3650 ./easyrsa build-client-full "$client" nopass
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EASYRSA_CRL_DAYS=3650 ./easyrsa gen-crl
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# Move the stuff we need
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cp pki/ca.crt pki/private/ca.key pki/issued/server.crt pki/private/server.key pki/crl.pem /etc/openvpn/server
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# CRL is read with each client connection, when OpenVPN is dropped to nobody
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chown nobody:"$group_name" /etc/openvpn/server/crl.pem
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# Generate key for tls-crypt
|
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openvpn --genkey --secret /etc/openvpn/server/tc.key
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# Create the DH parameters file using the predefined ffdhe2048 group
|
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echo '-----BEGIN DH PARAMETERS-----
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|
MIIBCAKCAQEA//////////+t+FRYortKmq/cViAnPTzx2LnFg84tNpWp4TZBFGQz
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|
+8yTnc4kmz75fS/jY2MMddj2gbICrsRhetPfHtXV/WVhJDP1H18GbtCFY2VVPe0a
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|
87VXE15/V8k1mE8McODmi3fipona8+/och3xWKE2rec1MKzKT0g6eXq8CrGCsyT7
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||||||
|
YdEIqUuyyOP7uWrat2DX9GgdT0Kj3jlN9K5W7edjcrsZCwenyO4KbXCeAvzhzffi
|
||||||
|
7MA0BM0oNC9hkXL+nOmFg/+OTxIy7vKBg8P+OxtMb61zO7X8vC7CIAXFjvGDfRaD
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||||||
|
ssbzSibBsu/6iGtCOGEoXJf//////////wIBAg==
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-----END DH PARAMETERS-----' > /etc/openvpn/server/dh.pem
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||||||
|
# Generate server.conf
|
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echo "local $ip
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port $port
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proto $protocol
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|
dev tun
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||||||
|
ca ca.crt
|
||||||
|
cert server.crt
|
||||||
|
key server.key
|
||||||
|
dh dh.pem
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||||||
|
auth SHA512
|
||||||
|
tls-crypt tc.key
|
||||||
|
topology subnet
|
||||||
|
server 10.8.0.0 255.255.255.0" > /etc/openvpn/server/server.conf
|
||||||
|
# IPv6
|
||||||
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if [[ -z "$ip6" ]]; then
|
||||||
|
echo 'push "redirect-gateway def1 bypass-dhcp"' >> /etc/openvpn/server/server.conf
|
||||||
|
else
|
||||||
|
echo 'server-ipv6 fddd:1194:1194:1194::/64' >> /etc/openvpn/server/server.conf
|
||||||
|
echo 'push "redirect-gateway def1 ipv6 bypass-dhcp"' >> /etc/openvpn/server/server.conf
|
||||||
|
fi
|
||||||
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echo 'ifconfig-pool-persist ipp.txt' >> /etc/openvpn/server/server.conf
|
||||||
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# DNS
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||||||
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case "$dns" in
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1|"")
|
||||||
|
# Locate the proper resolv.conf
|
||||||
|
# Needed for systems running systemd-resolved
|
||||||
|
if grep -q "127.0.0.53" "/etc/resolv.conf"; then
|
||||||
|
resolv_conf="/run/systemd/resolve/resolv.conf"
|
||||||
|
else
|
||||||
|
resolv_conf="/etc/resolv.conf"
|
||||||
|
fi
|
||||||
|
# Obtain the resolvers from resolv.conf and use them for OpenVPN
|
||||||
|
grep -v '#' "$resolv_conf" | grep nameserver | grep -E -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | while read line; do
|
||||||
|
echo "push \"dhcp-option DNS $line\"" >> /etc/openvpn/server/server.conf
|
||||||
|
done
|
||||||
|
;;
|
||||||
|
2)
|
||||||
|
echo 'push "dhcp-option DNS 1.1.1.1"' >> /etc/openvpn/server/server.conf
|
||||||
|
echo 'push "dhcp-option DNS 1.0.0.1"' >> /etc/openvpn/server/server.conf
|
||||||
|
;;
|
||||||
|
3)
|
||||||
|
echo 'push "dhcp-option DNS 8.8.8.8"' >> /etc/openvpn/server/server.conf
|
||||||
|
echo 'push "dhcp-option DNS 8.8.4.4"' >> /etc/openvpn/server/server.conf
|
||||||
|
;;
|
||||||
|
4)
|
||||||
|
echo 'push "dhcp-option DNS 208.67.222.222"' >> /etc/openvpn/server/server.conf
|
||||||
|
echo 'push "dhcp-option DNS 208.67.220.220"' >> /etc/openvpn/server/server.conf
|
||||||
|
;;
|
||||||
|
5)
|
||||||
|
echo 'push "dhcp-option DNS 129.250.35.250"' >> /etc/openvpn/server/server.conf
|
||||||
|
echo 'push "dhcp-option DNS 129.250.35.251"' >> /etc/openvpn/server/server.conf
|
||||||
|
;;
|
||||||
|
6)
|
||||||
|
echo 'push "dhcp-option DNS 176.103.130.130"' >> /etc/openvpn/server/server.conf
|
||||||
|
echo 'push "dhcp-option DNS 176.103.130.131"' >> /etc/openvpn/server/server.conf
|
||||||
|
;;
|
||||||
|
esac
|
||||||
|
echo "keepalive 10 120
|
||||||
|
cipher AES-256-CBC
|
||||||
|
user nobody
|
||||||
|
group $group_name
|
||||||
|
persist-key
|
||||||
|
persist-tun
|
||||||
|
crl-verify crl.pem" >> /etc/openvpn/server/server.conf
|
||||||
|
if [[ "$protocol" = "udp" ]]; then
|
||||||
|
echo "explicit-exit-notify" >> /etc/openvpn/server/server.conf
|
||||||
|
fi
|
||||||
|
# Enable net.ipv4.ip_forward for the system
|
||||||
|
echo 'net.ipv4.ip_forward=1' > /etc/sysctl.d/30-openvpn-forward.conf
|
||||||
|
# Enable without waiting for a reboot or service restart
|
||||||
|
echo 1 > /proc/sys/net/ipv4/ip_forward
|
||||||
|
if [[ -n "$ip6" ]]; then
|
||||||
|
# Enable net.ipv6.conf.all.forwarding for the system
|
||||||
|
echo "net.ipv6.conf.all.forwarding=1" >> /etc/sysctl.d/30-openvpn-forward.conf
|
||||||
|
# Enable without waiting for a reboot or service restart
|
||||||
|
echo 1 > /proc/sys/net/ipv6/conf/all/forwarding
|
||||||
|
fi
|
||||||
|
if systemctl is-active --quiet firewalld.service; then
|
||||||
|
# Using both permanent and not permanent rules to avoid a firewalld
|
||||||
|
# reload.
|
||||||
|
# We don't use --add-service=openvpn because that would only work with
|
||||||
|
# the default port and protocol.
|
||||||
|
firewall-cmd --add-port="$port"/"$protocol"
|
||||||
|
firewall-cmd --zone=trusted --add-source=10.8.0.0/24
|
||||||
|
firewall-cmd --permanent --add-port="$port"/"$protocol"
|
||||||
|
firewall-cmd --permanent --zone=trusted --add-source=10.8.0.0/24
|
||||||
|
# Set NAT for the VPN subnet
|
||||||
|
firewall-cmd --direct --add-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to "$ip"
|
||||||
|
firewall-cmd --permanent --direct --add-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to "$ip"
|
||||||
|
if [[ -n "$ip6" ]]; then
|
||||||
|
firewall-cmd --zone=trusted --add-source=fddd:1194:1194:1194::/64
|
||||||
|
firewall-cmd --permanent --zone=trusted --add-source=fddd:1194:1194:1194::/64
|
||||||
|
firewall-cmd --direct --add-rule ipv6 nat POSTROUTING 0 -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to "$ip6"
|
||||||
|
firewall-cmd --permanent --direct --add-rule ipv6 nat POSTROUTING 0 -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to "$ip6"
|
||||||
|
fi
|
||||||
|
else
|
||||||
|
# Create a service to set up persistent iptables rules
|
||||||
|
iptables_path=$(command -v iptables)
|
||||||
|
ip6tables_path=$(command -v ip6tables)
|
||||||
|
echo "[Unit]
|
||||||
|
Before=network.target
|
||||||
|
[Service]
|
||||||
|
Type=oneshot
|
||||||
|
ExecStart=$iptables_path -t nat -A POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $ip
|
||||||
|
ExecStart=$iptables_path -I INPUT -p $protocol --dport $port -j ACCEPT
|
||||||
|
ExecStart=$iptables_path -I FORWARD -s 10.8.0.0/24 -j ACCEPT
|
||||||
|
ExecStart=$iptables_path -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
|
||||||
|
ExecStop=$iptables_path -t nat -D POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $ip
|
||||||
|
ExecStop=$iptables_path -D INPUT -p $protocol --dport $port -j ACCEPT
|
||||||
|
ExecStop=$iptables_path -D FORWARD -s 10.8.0.0/24 -j ACCEPT
|
||||||
|
ExecStop=$iptables_path -D FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT" > /etc/systemd/system/openvpn-iptables.service
|
||||||
|
if [[ -n "$ip6" ]]; then
|
||||||
|
echo "ExecStart=/sbin/ip6tables -t nat -A POSTROUTING -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to $ip6
|
||||||
|
ExecStart=$ip6tables_path -I FORWARD -s fddd:1194:1194:1194::/64 -j ACCEPT
|
||||||
|
ExecStart=$ip6tables_path -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
|
||||||
|
ExecStop=$ip6tables_path -t nat -D POSTROUTING -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to $ip6
|
||||||
|
ExecStop=$ip6tables_path -D FORWARD -s fddd:1194:1194:1194::/64 -j ACCEPT
|
||||||
|
ExecStop=$ip6tables_path -D FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT" >> /etc/systemd/system/openvpn-iptables.service
|
||||||
|
fi
|
||||||
|
echo "RemainAfterExit=yes
|
||||||
|
[Install]
|
||||||
|
WantedBy=multi-user.target" >> /etc/systemd/system/openvpn-iptables.service
|
||||||
|
systemctl enable --now openvpn-iptables.service
|
||||||
|
fi
|
||||||
|
# If SELinux is enabled and a custom port was selected, we need this
|
||||||
|
if sestatus 2>/dev/null | grep "Current mode" | grep -q "enforcing" && [[ "$port" != 1194 ]]; then
|
||||||
|
# Install semanage if not already present
|
||||||
|
if ! hash semanage 2>/dev/null; then
|
||||||
|
if [[ "$os_version" -eq 7 ]]; then
|
||||||
|
# Centos 7
|
||||||
|
yum install -y policycoreutils-python
|
||||||
|
else
|
||||||
|
# CentOS 8 or Fedora
|
||||||
|
dnf install -y policycoreutils-python-utils
|
||||||
|
fi
|
||||||
|
fi
|
||||||
|
semanage port -a -t openvpn_port_t -p "$protocol" "$port"
|
||||||
|
fi
|
||||||
|
# If the server is behind NAT, use the correct IP address
|
||||||
|
[[ ! -z "$public_ip" ]] && ip="$public_ip"
|
||||||
|
# client-common.txt is created so we have a template to add further users later
|
||||||
|
echo "client
|
||||||
|
dev tun
|
||||||
|
proto $protocol
|
||||||
|
remote $ip $port
|
||||||
|
resolv-retry infinite
|
||||||
|
nobind
|
||||||
|
persist-key
|
||||||
|
persist-tun
|
||||||
|
remote-cert-tls server
|
||||||
|
auth SHA512
|
||||||
|
cipher AES-256-CBC
|
||||||
|
ignore-unknown-option block-outside-dns
|
||||||
|
block-outside-dns
|
||||||
|
verb 3" > /etc/openvpn/server/client-common.txt
|
||||||
|
# Enable and start the OpenVPN service
|
||||||
|
systemctl enable --now openvpn-server@server.service
|
||||||
|
# Generates the custom client.ovpn
|
||||||
|
new_client
|
||||||
|
echo
|
||||||
|
echo "Finished!"
|
||||||
|
echo
|
||||||
|
echo "Your client configuration is available at:" ~/"$client.ovpn"
|
||||||
|
echo "If you want to add more clients, just run this script again!"
|
||||||
|
else
|
||||||
|
clear
|
||||||
|
echo "Looks like OpenVPN is already installed."
|
||||||
|
echo
|
||||||
|
echo "What do you want to do?"
|
||||||
|
echo " 1) Add a new user"
|
||||||
|
echo " 2) Revoke an existing user"
|
||||||
|
echo " 3) Remove OpenVPN"
|
||||||
|
echo " 4) Exit"
|
||||||
|
read -p "Select an option: " option
|
||||||
|
until [[ "$option" =~ ^[1-4]$ ]]; do
|
||||||
|
echo "$option: invalid selection."
|
||||||
|
read -p "Select an option: " option
|
||||||
|
done
|
||||||
|
case "$option" in
|
||||||
|
1)
|
||||||
|
echo
|
||||||
|
echo "Tell me a name for the client certificate."
|
||||||
|
read -p "Client name: " unsanitized_client
|
||||||
|
client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client")
|
||||||
|
while [[ -z "$client" || -e /etc/openvpn/server/easy-rsa/pki/issued/"$client".crt ]]; do
|
||||||
|
echo "$client: invalid client name."
|
||||||
|
read -p "Client name: " unsanitized_client
|
||||||
|
client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client")
|
||||||
|
done
|
||||||
|
cd /etc/openvpn/server/easy-rsa/
|
||||||
|
EASYRSA_CERT_EXPIRE=3650 ./easyrsa build-client-full "$client" nopass
|
||||||
|
# Generates the custom client.ovpn
|
||||||
|
new_client
|
||||||
|
echo
|
||||||
|
echo "Client $client added, configuration is available at:" ~/"$client.ovpn"
|
||||||
|
exit
|
||||||
|
;;
|
||||||
|
2)
|
||||||
|
# This option could be documented a bit better and maybe even be simplified
|
||||||
|
# ...but what can I say, I want some sleep too
|
||||||
|
number_of_clients=$(tail -n +2 /etc/openvpn/server/easy-rsa/pki/index.txt | grep -c "^V")
|
||||||
|
if [[ "$number_of_clients" = 0 ]]; then
|
||||||
|
echo
|
||||||
|
echo "You have no existing clients!"
|
||||||
|
exit
|
||||||
|
fi
|
||||||
|
echo
|
||||||
|
echo "Select the existing client certificate you want to revoke:"
|
||||||
|
tail -n +2 /etc/openvpn/server/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | nl -s ') '
|
||||||
|
read -p "Select one client: " client_number
|
||||||
|
until [[ "$client_number" =~ ^[0-9]+$ && "$client_number" -le "$number_of_clients" ]]; do
|
||||||
|
echo "$client_number: invalid selection."
|
||||||
|
read -p "Select one client: " client_number
|
||||||
|
done
|
||||||
|
client=$(tail -n +2 /etc/openvpn/server/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | sed -n "$client_number"p)
|
||||||
|
echo
|
||||||
|
read -p "Do you really want to revoke access for client $client? [y/N]: " revoke
|
||||||
|
until [[ "$revoke" =~ ^[yYnN]*$ ]]; do
|
||||||
|
echo "$revoke: invalid selection."
|
||||||
|
read -p "Do you really want to revoke access for client $client? [y/N]: " revoke
|
||||||
|
done
|
||||||
|
if [[ "$revoke" =~ ^[yY]$ ]]; then
|
||||||
|
cd /etc/openvpn/server/easy-rsa/
|
||||||
|
./easyrsa --batch revoke "$client"
|
||||||
|
EASYRSA_CRL_DAYS=3650 ./easyrsa gen-crl
|
||||||
|
rm -f /etc/openvpn/server/crl.pem
|
||||||
|
cp /etc/openvpn/server/easy-rsa/pki/crl.pem /etc/openvpn/server/crl.pem
|
||||||
|
# CRL is read with each client connection, when OpenVPN is dropped to nobody
|
||||||
|
chown nobody:"$group_name" /etc/openvpn/server/crl.pem
|
||||||
|
echo
|
||||||
|
echo "Certificate for client $client revoked!"
|
||||||
|
else
|
||||||
|
echo
|
||||||
|
echo "Certificate revocation for client $client aborted!"
|
||||||
|
fi
|
||||||
|
exit
|
||||||
|
;;
|
||||||
|
3)
|
||||||
|
echo
|
||||||
|
read -p "Do you really want to remove OpenVPN? [y/N]: " remove
|
||||||
|
until [[ "$remove" =~ ^[yYnN]*$ ]]; do
|
||||||
|
echo "$remove: invalid selection."
|
||||||
|
read -p "Do you really want to remove OpenVPN? [y/N]: " remove
|
||||||
|
done
|
||||||
|
if [[ "$remove" =~ ^[yY]$ ]]; then
|
||||||
|
port=$(grep '^port ' /etc/openvpn/server/server.conf | cut -d " " -f 2)
|
||||||
|
protocol=$(grep '^proto ' /etc/openvpn/server/server.conf | cut -d " " -f 2)
|
||||||
|
if systemctl is-active --quiet firewalld.service; then
|
||||||
|
ip=$(firewall-cmd --direct --get-rules ipv4 nat POSTROUTING | grep '\-s 10.8.0.0/24 '"'"'!'"'"' -d 10.8.0.0/24' | grep -oE '[^ ]+$')
|
||||||
|
# Using both permanent and not permanent rules to avoid a firewalld reload.
|
||||||
|
firewall-cmd --remove-port="$port"/"$protocol"
|
||||||
|
firewall-cmd --zone=trusted --remove-source=10.8.0.0/24
|
||||||
|
firewall-cmd --permanent --remove-port="$port"/"$protocol"
|
||||||
|
firewall-cmd --permanent --zone=trusted --remove-source=10.8.0.0/24
|
||||||
|
firewall-cmd --direct --remove-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to "$ip"
|
||||||
|
firewall-cmd --permanent --direct --remove-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to "$ip"
|
||||||
|
if grep -qs "server-ipv6" /etc/openvpn/server/server.conf; then
|
||||||
|
ip6=$(firewall-cmd --direct --get-rules ipv6 nat POSTROUTING | grep '\-s fddd:1194:1194:1194::/64 '"'"'!'"'"' -d fddd:1194:1194:1194::/64' | grep -oE '[^ ]+$')
|
||||||
|
firewall-cmd --zone=trusted --remove-source=fddd:1194:1194:1194::/64
|
||||||
|
firewall-cmd --permanent --zone=trusted --remove-source=fddd:1194:1194:1194::/64
|
||||||
|
firewall-cmd --direct --remove-rule ipv6 nat POSTROUTING 0 -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to "$ip6"
|
||||||
|
firewall-cmd --permanent --direct --remove-rule ipv6 nat POSTROUTING 0 -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to "$ip6"
|
||||||
|
fi
|
||||||
|
else
|
||||||
|
systemctl disable --now openvpn-iptables.service
|
||||||
|
rm -f /etc/systemd/system/openvpn-iptables.service
|
||||||
|
fi
|
||||||
|
if sestatus 2>/dev/null | grep "Current mode" | grep -q "enforcing" && [[ "$port" != 1194 ]]; then
|
||||||
|
semanage port -d -t openvpn_port_t -p "$protocol" "$port"
|
||||||
|
fi
|
||||||
|
systemctl disable --now openvpn-server@server.service
|
||||||
|
rm -rf /etc/openvpn/server
|
||||||
|
rm -f /etc/systemd/system/openvpn-server@server.service.d/disable-limitnproc.conf
|
||||||
|
rm -f /etc/sysctl.d/30-openvpn-forward.conf
|
||||||
|
if [[ "$os" = "debian" || "$os" = "ubuntu" ]]; then
|
||||||
|
apt-get remove --purge -y openvpn
|
||||||
|
else
|
||||||
|
# Else, OS must be CentOS or Fedora
|
||||||
|
yum remove -y openvpn
|
||||||
|
fi
|
||||||
|
echo
|
||||||
|
echo "OpenVPN removed!"
|
||||||
|
else
|
||||||
|
echo
|
||||||
|
echo "Removal aborted!"
|
||||||
|
fi
|
||||||
|
exit
|
||||||
|
;;
|
||||||
|
4)
|
||||||
|
exit
|
||||||
|
;;
|
||||||
|
esac
|
||||||
|
fi
|
||||||
|
|
||||||
Loading…
Reference in New Issue
Block a user